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Full-Text Articles in Science and Technology Studies
Microstructure And Micro-Texture Evolution During The Dynamic Recrystallisation Of A Ni-30fe-Nb-C Model Alloy, Parvez Mannan, Ahmed A. Saleh, Azdiar A. Gazder, Gilberto Casillas, Elena V. Pereloma
Microstructure And Micro-Texture Evolution During The Dynamic Recrystallisation Of A Ni-30fe-Nb-C Model Alloy, Parvez Mannan, Ahmed A. Saleh, Azdiar A. Gazder, Gilberto Casillas, Elena V. Pereloma
Faculty of Engineering and Information Sciences - Papers: Part A
The evolution of microstructure and micro-texture during discontinuous dynamic recrystallisation of an austenitic Ni-30Fe-Nb-C model alloy subjected to interrupted plane strain compression at strains (ε) of 0.23, 0.35, 0.68, 0.85 and 1.2 was investigated using electron backscattering diffraction and transmission electron microscopy. Throughout the strain range, the majority of dynamic recrystallisation events comprised nucleation in necklace-like arrangements located at and along grain boundaries via bulging. At ε ≥ 0.68, discrete nucleation events were also observed within grain interiors. Grain growth during dynamic recrystallisation is characteristic of strain induced boundary migration. The initial texture comprised Cube-RD ({013}〈100〉), Cube-ND ({001}〈310〉) and Cube …
Enhanced Mechanical Properties Of Arb-Processed Aluminum Alloy 6061 Sheets By Subsequent Asymmetric Cryorolling And Ageing, Hai Liang Yu, Lihong Su, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Jintao Li, Ajit R. Godbole, Charlie Kong
Enhanced Mechanical Properties Of Arb-Processed Aluminum Alloy 6061 Sheets By Subsequent Asymmetric Cryorolling And Ageing, Hai Liang Yu, Lihong Su, Cheng Lu, Anh Kiet Tieu, Hui Jun Li, Jintao Li, Ajit R. Godbole, Charlie Kong
Faculty of Engineering and Information Sciences - Papers: Part A
Grain size and precipitations affect the strength and ductility of ultrafine-grained materials. In this study, aluminum alloy 6061 sheets were fabricated using the accumulative roll bonding (ARB) technique. The ARB-processed sheets were subsequently subjected to cryorolling and asymmetric cryorolling. The sheets were further aged at 100 °C for 48 h. Mechanical tests show that a combination of asymmetric cryorolling and ageing results in significant improvement in both the ductility and the strength of the ARB-processed sheets. The microstructures of the sheets at different stages of the process were also analyzed using optical microscopy, scanning electron microscopy, transmission electron microscopy and …
Correlation Between Zn-Rich Phase And Corrosion/Oxidation Behavior Of Sn-8zn-3bi Alloy, Xin Zhang, Chong Li, Zhiming Gao, Yongchang Liu, Zongqing Ma, Liming Yu, Hui Jun Li
Correlation Between Zn-Rich Phase And Corrosion/Oxidation Behavior Of Sn-8zn-3bi Alloy, Xin Zhang, Chong Li, Zhiming Gao, Yongchang Liu, Zongqing Ma, Liming Yu, Hui Jun Li
Faculty of Engineering and Information Sciences - Papers: Part A
The microstructure of Sn-8Zn-3Bi alloy was refined by increasing the solidification rate and the correlation between Zn-rich phase and the corrosion/oxidation behavior of the alloy was investigated. The Zn-rich phase transforms from coarse flakes to fine needles dispersed in the β-Sn matrix with the increase of the cooling rate. The transformation of Zn-rich precipitates enhances the anticorrosive ability of Sn-8Zn-3Bi alloy in 3.5 wt.% NaCl solution. On the contrary, Sn-8Zn-3Bi alloy with a fine needle-like Zn-rich phase shows poor oxidation resistance under air atmosphere, due to the fast diffusion of Zn atoms in Sn matrix.
Arc Erosion Behavior Of La-Doping Titanium-Zirconium-Molybdenum Alloy, Ping Hu, Bo-Liang Hu, Kuai-She Wang, Fan Yang, Rui Song, Zhi-Tao Yu, Qiang Wang, Wei-Cheng Cao, Dong-Xin Liu, Geng An, Lei Guo, Hai Liang Yu
Arc Erosion Behavior Of La-Doping Titanium-Zirconium-Molybdenum Alloy, Ping Hu, Bo-Liang Hu, Kuai-She Wang, Fan Yang, Rui Song, Zhi-Tao Yu, Qiang Wang, Wei-Cheng Cao, Dong-Xin Liu, Geng An, Lei Guo, Hai Liang Yu
Faculty of Engineering and Information Sciences - Papers: Part A
La-doping titanium-zirconium-molybdenum alloys have good arc erosion resistance performances, but there is no research about the changes during the arc erosion. Arc erosion characteristics of La-doping titanium-zirconium-molybdenum alloys after 5000 operations under direct current 20 V, 15 A and resistive load conditions were investigated using a JF04C test system. The results indicated that the probability distribution and change trend of arc energy and arc time during 5000 operations were similar and the relationship between arc time and arc energy followed exponential function. The change of arc energy with test number was consistent to electrical resistance. Oxide particles, crater and cracks …
The Effects Of Vacuum Annealing Temperatures On The Microstructure, Mechanical Properties And Electrical Resistivity Of Mg-3al-1zn Alloy Ribbons, Fenghua Chen, Qingxue Huang, Zhengyi Jiang, Jingwei Zhao, Binyu Sun, Yugui Li
The Effects Of Vacuum Annealing Temperatures On The Microstructure, Mechanical Properties And Electrical Resistivity Of Mg-3al-1zn Alloy Ribbons, Fenghua Chen, Qingxue Huang, Zhengyi Jiang, Jingwei Zhao, Binyu Sun, Yugui Li
Faculty of Engineering and Information Sciences - Papers: Part A
This paper investigates the influence of vacuum annealing temperature on the microstructure, mechanical properties and electrical resistivity of Mg-3Al-1Zn rapid solidification (RS) magnesium ribbons. The results indicate that when the annealing temperature is increased, the grain size of the ribbons is dramatically reduced from 10 to 1 μm. The highest break stress and micro-hardness is obtained at 673 K. These effects are ascribed to the dispersion strengthening caused by the high amount of fine nanoparticles distributed in the material. Electrical resistivity-temperature (ρ-T) curves have been used to provide useful information about the effects of the annealing temperature on the grain …
Microstructural Evolution And Mechanical Property Of Aa5050 Alloy Deformed By Accumulative Roll Bonding, Kuiyu Cheng, Cheng Lu, A Kiet Tieu, Hongtao Zhu
Microstructural Evolution And Mechanical Property Of Aa5050 Alloy Deformed By Accumulative Roll Bonding, Kuiyu Cheng, Cheng Lu, A Kiet Tieu, Hongtao Zhu
Faculty of Engineering and Information Sciences - Papers: Part A
In this study, ultrafine-grained AA5050 sheets were fabricated by the accumulative roll bonding (ARB) process. Transmission electron microscope observations showed that at the early stage of ARB, the grain size was reduced in the normal direction and became elongated along the rolling direction. The elongated grains were cut out by dense dislocations, which then tangled and condensed, resulting in the formation of dislocation cells. As the deformation proceeded, the dislocation cells evolved to sub-grain boundaries and then grain boundaries. The ultrafinegrained microstructure was obtained via four ARB cycles. The tensile tests at 473 K and 523 K (200 degrees C …
Optimization And Application Of Process Parameters In An Az61 Alloy Twin-Roll Strip Casting, Jintao Li, Guangming Xu, Hailiang Yu, Lihong Su, Guanyu Deng, Cheng Lu, Lizi He, Huijun Li
Optimization And Application Of Process Parameters In An Az61 Alloy Twin-Roll Strip Casting, Jintao Li, Guangming Xu, Hailiang Yu, Lihong Su, Guanyu Deng, Cheng Lu, Lizi He, Huijun Li
Faculty of Engineering and Information Sciences - Papers: Part A
Twin-roll strip casting is a concerned technology for economically producing magnesium alloys sheets. In this paper, numerical simulation of the twin-roll strip casting of an AZ61 magnesium alloy was carried out and the optimal process parameters were obtained. Then, under the conditions obtained through simulation, AZ61 strips of good surface quality were successfully manufactured. The microstructure of the alloy by twin-rolled strip casting is obvious refined compared with that by conventional casting.
A Comparative Study For Wear Resistant Of Stellite 6 Coatings On Nickel Alloy Substrate Produced By Laser Cladding, Hvof And Plasma Spraying Techniques, Alain Kusmoko, Druce P. Dunne, Huijun Li
A Comparative Study For Wear Resistant Of Stellite 6 Coatings On Nickel Alloy Substrate Produced By Laser Cladding, Hvof And Plasma Spraying Techniques, Alain Kusmoko, Druce P. Dunne, Huijun Li
Faculty of Engineering and Information Sciences - Papers: Part A
Stellite 6 coatings were deposited using laser cladding, high velocity oxygen fuel (HVOF) thermal spraying and plasma spraying techniques on a nickel alloy substrate. The surface roughness, chemical composition and microstructure of these coatings were characterised by a surface profilometer, optical microscopy (OM) and scanning electron microscopy (SEM). The microhardness of the coatings was measured and the wear behaviour of the coatings was examined under controlled test conditions in a pin-on-plate (reciprocating) tribometer. The results showed that fully dense and crack-free laser clad Stellite 6 coatings can be formed on a high nickel steel substrate. Average microhardness values of the …
An Amorphous Alloy Core Medium Frequency Magnetic-Link For Medium Voltage Photovoltaic Inverters, Md Rabiul Islam, Youguang Guo, Zhi Wei Lin, Jianguo Zhu
An Amorphous Alloy Core Medium Frequency Magnetic-Link For Medium Voltage Photovoltaic Inverters, Md Rabiul Islam, Youguang Guo, Zhi Wei Lin, Jianguo Zhu
Faculty of Engineering and Information Sciences - Papers: Part B
The advanced magnetic materials with high saturation flux density and low specific core loss have led to the development of an efficient, compact, and lightweight multiple-input multiple-output medium frequency magnetic-link. It offers a new route to eliminate some critical limitations of recently proposed medium voltage photovoltaic inverters. In this paper, a medium frequency magnetic-link is developed with Metglas amorphous alloy 2605S3A. The common magnetic-link generates isolated and balanced multiple DC supplies for all of the H-bridge inverter cells of the medium voltage inverter. The design and implementation of the prototype, test platform, and the experimental test results are analyzed and …
Effects Of Hydrogen On The Critical Conditions For Dynamic Recrystallization Of Titanium Alloy During Hot Deformation, Jingwei Zhao, Hua Ding, Zhengyi Jiang, Dongbin Wei, Kezhi Linghu
Effects Of Hydrogen On The Critical Conditions For Dynamic Recrystallization Of Titanium Alloy During Hot Deformation, Jingwei Zhao, Hua Ding, Zhengyi Jiang, Dongbin Wei, Kezhi Linghu
Faculty of Engineering and Information Sciences - Papers: Part A
Hot deformation tests were performed to study the flow behavior and microstructural evolution of a Ti600 titanium alloy with different hydrogen contents. The effects of hydrogen on the critical conditions for the initiation of dynamic recrystallization (DRX) were investigated. The DRX kinetics models of hydrogenated Ti600 alloy were developed, and the DRX volume fractions were quantified under different deformation conditions. The results indicate that the addition of proper hydrogen (no greater than 0.3 pct) benefits the decrease of both the critical stress and critical strain for the initiation of DRX. The critical stress and critical strain are dependent linearly on …
The Effect Of Ageing On Microstructure And Mechanical Properties Of Powder Ti-5al-5mo-5v-1cr-1fe Alloy, Mansur Ahmed, Dmytro Savvakin, Orest M. Ivasishin, E V. Pereloma
The Effect Of Ageing On Microstructure And Mechanical Properties Of Powder Ti-5al-5mo-5v-1cr-1fe Alloy, Mansur Ahmed, Dmytro Savvakin, Orest M. Ivasishin, E V. Pereloma
Faculty of Engineering and Information Sciences - Papers: Part A
The thermo-mechanically processed powder Ti-5Al-5V-5Mo-1Cr-1Fe alloy was aged at 9.23 K for 1-8 h in order to investigate the effect of ageing time on the microstructure-mechanical properties relationships. The microstructures of the alloy after ageing cosist of the both primary and secondary alpha phases with retained B matrix phase. The shift of B peaks in X-ray pattern with ageing time indicates an increase in lattice parameter distorition due to diffusion into the retained B phase of more B stabilisers with smaller atomic radius compared to the elemental Ti. The tensile test results indicate that the sample aged for 1 h …
The Magnetocaloric Effect And Critical Behaviour Of The Mn0.94ti0.06coge Alloy, P Shamba, Jianli Wang, J C. Debnath, S J. Kennedy, Rong Zeng, M F Md Din, F Hong, Z X. Cheng, A J. Studer, S X. Dou
The Magnetocaloric Effect And Critical Behaviour Of The Mn0.94ti0.06coge Alloy, P Shamba, Jianli Wang, J C. Debnath, S J. Kennedy, Rong Zeng, M F Md Din, F Hong, Z X. Cheng, A J. Studer, S X. Dou
Jianli Wang
Structural, magnetic and magnetocaloric properties of the Mn0.94Ti0.06CoGe alloy have been investigated using x-ray diffraction, DC magnetization and neutron diffraction measurements. Two phase transitions have been detected, at T-str = 235 K and T-C = 270 K. A giant magnetocaloric effect has been obtained at around Tstr associated with a structural phase transition from the low temperature orthorhombic TiNiSi-type structure to the high temperature hexagonal Ni2In-type structure, which is confirmed by neutron study. In the vicinity of the structural transition, at T-str, the magnetic entropy change, -Delta S-M reached a maximum value of 14.8 J kg(-1) K-1 under a magnetic …
The Magnetocaloric Effect And Critical Behaviour Of The Mn0.94ti0.06coge Alloy, P Shamba, Jianli Wang, J C. Debnath, S J. Kennedy, Rong Zeng, M F Md Din, F Hong, Z X. Cheng, A J. Studer, S X. Dou
The Magnetocaloric Effect And Critical Behaviour Of The Mn0.94ti0.06coge Alloy, P Shamba, Jianli Wang, J C. Debnath, S J. Kennedy, Rong Zeng, M F Md Din, F Hong, Z X. Cheng, A J. Studer, S X. Dou
Shi Xue Dou
Structural, magnetic and magnetocaloric properties of the Mn0.94Ti0.06CoGe alloy have been investigated using x-ray diffraction, DC magnetization and neutron diffraction measurements. Two phase transitions have been detected, at T-str = 235 K and T-C = 270 K. A giant magnetocaloric effect has been obtained at around Tstr associated with a structural phase transition from the low temperature orthorhombic TiNiSi-type structure to the high temperature hexagonal Ni2In-type structure, which is confirmed by neutron study. In the vicinity of the structural transition, at T-str, the magnetic entropy change, -Delta S-M reached a maximum value of 14.8 J kg(-1) K-1 under a magnetic …
The Magnetocaloric Effect And Critical Behaviour Of The Mn0.94ti0.06coge Alloy, P Shamba, Jianli Wang, J C. Debnath, S J. Kennedy, Rong Zeng, M F Md Din, F Hong, Z X. Cheng, A J. Studer, S X. Dou
The Magnetocaloric Effect And Critical Behaviour Of The Mn0.94ti0.06coge Alloy, P Shamba, Jianli Wang, J C. Debnath, S J. Kennedy, Rong Zeng, M F Md Din, F Hong, Z X. Cheng, A J. Studer, S X. Dou
Faculty of Engineering and Information Sciences - Papers: Part A
Structural, magnetic and magnetocaloric properties of the Mn0.94Ti0.06CoGe alloy have been investigated using x-ray diffraction, DC magnetization and neutron diffraction measurements. Two phase transitions have been detected, at T-str = 235 K and T-C = 270 K. A giant magnetocaloric effect has been obtained at around Tstr associated with a structural phase transition from the low temperature orthorhombic TiNiSi-type structure to the high temperature hexagonal Ni2In-type structure, which is confirmed by neutron study. In the vicinity of the structural transition, at T-str, the magnetic entropy change, -Delta S-M reached a maximum value of 14.8 J kg(-1) K-1 under a magnetic …
Microtexture Based Analysis Of Surface Asperity Flattening Behavior Of Annealed Aluminum Alloy In Uniaxial Planar Compression, Hejie Li, Zhengyi Jiang, Dongbin Wei, Xiaoming Zhang
Microtexture Based Analysis Of Surface Asperity Flattening Behavior Of Annealed Aluminum Alloy In Uniaxial Planar Compression, Hejie Li, Zhengyi Jiang, Dongbin Wei, Xiaoming Zhang
Faculty of Engineering and Information Sciences - Papers: Part A
During the uniaxial planar compression of annealed aluminum alloy, a novel approach to determine surface asperity flattening (roughness Ra) is employed by analyzing the evolution of surface microtexture. With an increase in gauged reduction, surface asperity tends to be flattened, and strain hardening increases. Lubrication can constrain the surface asperity flattening process. Development of surface asperity features shows the obvious dependency on [111] orientation. In-grain slips contribute significantly to the evolution of surface microtexture. Influence of deformation twins (brass orientation) on the evolution of microtexture is not obvious under our current experimental conditions.
Towards Improved Steel Alloy Designs For Control Of Weld Heat Affected Zone Properties, F J. Barbaro, Z Zhu, L Kuzmikova, H Li, J M. Gray
Towards Improved Steel Alloy Designs For Control Of Weld Heat Affected Zone Properties, F J. Barbaro, Z Zhu, L Kuzmikova, H Li, J M. Gray
Faculty of Engineering and Information Sciences - Papers: Part A
This paper reviews the current technology related to control of weld HAZ properties in high strength steels. The debate related to appropriate balance of Ti and N is addressed and it appears that a stoichiometric ratio provides optimum fracture toughness. The results are significant because despite the well established difficulties in controlling Ti/N ratio, this data now provides guidance in terms of alloy design to achieve optimum fracture toughness in the HAZ of welds. The enhanced resistance to grain coarsening behaviour of high Nb steels has now provided another incremental improvement in the weldability of steels for critical applications such …
Mechanical Properties Of Al-Mg-Si Alloy Sheets Produced Using Asymmetric Cryorolling And Ageing Treatment, Hai-Liang Yu, A Kiet Tieu, Cheng Lu, Xiang-Hua Liu, Ajit Godbole, Charlie Kong
Mechanical Properties Of Al-Mg-Si Alloy Sheets Produced Using Asymmetric Cryorolling And Ageing Treatment, Hai-Liang Yu, A Kiet Tieu, Cheng Lu, Xiang-Hua Liu, Ajit Godbole, Charlie Kong
Faculty of Engineering and Information Sciences - Papers: Part A
An asymmetric cryorolling technique was used to reduce the thickness of an Al-Mg-Si alloy sheet from 1.5 mm to 0.19 mm. The samples were subsequently aged for 48 h at 100 degrees celcius. The hardness and tensile strength of both rolled and aged sheets increased with the number of passes up to the sixth pass, but the tensile stress decreased after the seventh pass. Investigation of the microstructure of the sheets showed that the grain size after seven passes was about 235 nm and revealed the presence of Fe-Cr-Mn-Si particles in the samples. The deformation of Fe-Cr-Mn-Si particles and sheet …
Defect Dynamics In Polycrystalline Zirconium Alloy Probed In Situ By Primary Extinction Of Neutron Diffraction, Saurabh Kabra, Kun Yan, David G. Carr, Robert P. Harrison, Rian J. Dippenaar, Mark Reid, Klaus-Dieter Liss
Defect Dynamics In Polycrystalline Zirconium Alloy Probed In Situ By Primary Extinction Of Neutron Diffraction, Saurabh Kabra, Kun Yan, David G. Carr, Robert P. Harrison, Rian J. Dippenaar, Mark Reid, Klaus-Dieter Liss
Faculty of Engineering and Information Sciences - Papers: Part A
After α + β-zirconium has fully transformed into β-phase upon heating, the intensities of all β-Zr Bragg reflections decrease simultaneously as a function of time. It is shown that this effect represents a transition from the kinematic to the dynamic theory of diffraction due to the ever increasing crystal perfection driven by thermal recovery of the system. The best fitting coherent crystallite size of 30 μm and other microstructural features are verified by in situ laser scanning confocal microscopy. This effect of primary extinction in neutron diffraction has been employed to further investigate the crystal perfection kinetics. Upon further heating, …
Simulation Of Defects In Micro-Deep Drawing Of An Aluminium Alloy Foil, Syamsul Hadi, Hai-Liang Yu, Kiet Tieu, Cheng Lu
Simulation Of Defects In Micro-Deep Drawing Of An Aluminium Alloy Foil, Syamsul Hadi, Hai-Liang Yu, Kiet Tieu, Cheng Lu
Faculty of Engineering and Information Sciences - Papers: Part A
Micro-forming refers to the application of conventional forming processes to manufacture products from ultra-thin sheet materials. While attempting to meet the increasing demand for cost-effective manufacturing of micro-formed components, it is very important to reduce the defects in the products. In this paper, we report a number of Finite Element (FE) simulations of the micro-deep drawing process with various sample thicknesses and eccentric distances. The simulations indicated that when the sample thickness is nearly equal to the gap between the plunger and the die, the sample is likely to develop fractures at the bottom corner. When the sample thickness is …
Analysis Of Thermal Stress During Of Twin-Roll Casting Of Magnesium Alloy, Yucheng Zhang, T Han, Zhengyi Jiang, Dongbin Wei
Analysis Of Thermal Stress During Of Twin-Roll Casting Of Magnesium Alloy, Yucheng Zhang, T Han, Zhengyi Jiang, Dongbin Wei
Faculty of Engineering and Information Sciences - Papers: Part A
The process of twin-roll casting including pouring, solidifying, rolling and cooling can be accomplished in a very short time. Consequently, some important process parameters in the twin-roll casting that are difficult to be obtained in experiment can be acquired using numerical simulation. In this paper, a numerical simulation based on a 2D finite element model of vertical twin-roll strip casting of magnesium alloy has been conducted, and the thermal stress fields are significantly discussed. The influences of key process parameters consisting of submerged nozzle depth and nozzle spray angle have been studied. The thermal cracks on the surface of the …
Effect Of Magnetostatic Field On Microstructure Of 5005 Aluminum Alloy Sheet By Roll-Casting, Jintao Li, Guangming Xu, Jianzhong Cui
Effect Of Magnetostatic Field On Microstructure Of 5005 Aluminum Alloy Sheet By Roll-Casting, Jintao Li, Guangming Xu, Jianzhong Cui
Faculty of Engineering and Information Sciences - Papers: Part A
The roll-casting technology of 5000 series aluminum alloy is one of the difficulties at present. Roll-casting technology was employed in this paper and high quality 5005 aluminum alloy sheets were fabricated successfully under different conditions. The solidification of melt in roll-casting process is the rapid directional solidification. The effect of magnetostatic field on microstructure of 5005 aluminum alloy sheet by roll-casting has been investigated and analyzed. The results indicate that imposing magnetostatic field can refine the grains of 5005 aluminum alloy.
Influence Of Hydrogen Content On Hot Deformation Behavior And Microstructural Evolution Of Ti600 Alloy, J W. Zhao, H Ding, H L. Hou, Z Q. Li
Influence Of Hydrogen Content On Hot Deformation Behavior And Microstructural Evolution Of Ti600 Alloy, J W. Zhao, H Ding, H L. Hou, Z Q. Li
Faculty of Engineering and Information Sciences - Papers: Part A
Isothermal hot compression tests of a Ti600 alloy after hydrogenation were carried out over the temperature range of 760 to 880℃ and strain rate range of 0.01 to 10 s-1. The influence of hydrogen content was studied on the flow stress and activation energy of deformation. The microstructural changes were examined by transmission electron microscopy (TEM). The results show that the addition of 0.3% hydrogen in Ti600 alloy can decrease the hot deformation temperature by 80 ◦C and increase the deformation strain rate by two orders of magnitude. Both the flow stress and activation energy of deformation of Ti600 alloy …
Glass Formation In A (Ti,Zr,Hf)-(Cu,Ni,Ag)-Al High-Order Alloy System By Mechanical Alloying, L C. Zhang, Z Q. Shen, Jian Xu
Glass Formation In A (Ti,Zr,Hf)-(Cu,Ni,Ag)-Al High-Order Alloy System By Mechanical Alloying, L C. Zhang, Z Q. Shen, Jian Xu
Faculty of Engineering and Information Sciences - Papers: Part A
In this work, glass formation under high-energy ball milling was investigated for a (Ti0.33Zr0.33Hf0.33)50(Ni0.33Cu0.33Ag0.33)40Al10 high-order alloy system with equiatomic substitution for early and late transition-metal contents. For comparison, an amorphous alloy ribbon with the same composition was prepared using the melt-spinning method as well. Structural features of the samples were characterized using x-ray diffraction, transmission electron microscopy, and differential scanning calorimetry. Mechanical alloying resulted in a glassy alloy similar to that obtained by melt spinning. However, the glass formation was incomplete, and a …