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Full-Text Articles in Social and Behavioral Sciences
Microstructure And Mechanical Properties Of 1050/6061 Laminated Composite Processed By Accumulative Roll Bonding, Lihong Su, Cheng Lu, Guanyu Deng, A K. Tieu, Xudong Sun
Microstructure And Mechanical Properties Of 1050/6061 Laminated Composite Processed By Accumulative Roll Bonding, Lihong Su, Cheng Lu, Guanyu Deng, A K. Tieu, Xudong Sun
Faculty of Engineering and Information Sciences - Papers: Part A
1050/6061 laminated composite sheets have been fabricated by the accumulative roll bonding (ARB) using commercial 1050 and 6061 aluminium alloys. Through-thickness hardness and tensile testes have been conducted to examine the mechanical properties of the laminated composites. It has been found that the strength of the composite materials is between the strengths of 6061 and 1050 primary materials. The average hardness of the 6061 layer is almost twice of the average value of the 1050 layer for both one and two-cycle processed composites. Optical microscopy, scanning electron microscopy and transmission electron microscopy were used to evaluate the microstructure of the …
The Effect Of Cooling Rates On The Microstructure And Mechanical Properties Of Thermo-Mechanically Processed Ti-Al-Mo-V-Cr-Fe Alloys, Mansur Ahmed, Dmytro G. Savvakin, Orest M. Ivasishin, Elena V. Pereloma
The Effect Of Cooling Rates On The Microstructure And Mechanical Properties Of Thermo-Mechanically Processed Ti-Al-Mo-V-Cr-Fe Alloys, Mansur Ahmed, Dmytro G. Savvakin, Orest M. Ivasishin, Elena V. Pereloma
Faculty of Engineering and Information Sciences - Papers: Part A
Two near-β titanium alloys, Ti–5Al–5Mo–5V–1Cr–1Fe and a modified one containing 2 wt% Cr (Ti–5Al–5Mo–5V–2Cr–1Fe) were produced from Ti hydride precursor powders via the cost-effective blended elemental powder metallurgy technique. The effects of two cooling rates (10 K s−1 and 1 K s−1) during thermo-mechanical processing on the microstructure and mechanical properties were investigated using X-ray diffraction and scanning electron microscopy. X-ray line profile analysis revealed that dislocation densities and microstrain in β-Ti phase are higher than in α-Ti phase for all cases. In both alloys, slower cooling results in an increase in α volume fraction and promotes morphology of continuous …
Smart Multifunctional Fluids For Lithium Ion Batteries: Enhanced Rate Performance And Intrinsic Mechanical Protection, Jie Ding, Tongfei Tian, Qing Meng, Zaiping Guo, Weihua Li, Peng Zhang, Fabio T. Ciacchi, Jewel Huang, Wenrong Yang
Smart Multifunctional Fluids For Lithium Ion Batteries: Enhanced Rate Performance And Intrinsic Mechanical Protection, Jie Ding, Tongfei Tian, Qing Meng, Zaiping Guo, Weihua Li, Peng Zhang, Fabio T. Ciacchi, Jewel Huang, Wenrong Yang
Faculty of Engineering and Information Sciences - Papers: Part A
Lithium ion batteries are attractive power sources for the consumer electronics market and are being aggressively developed for road transportation. Nevertheless, issues with safety and reliability need to be solved prior to the large-scale uptake of these batteries. There have recently been significant development and assessment of materials with resistance to mechanical abuse, with the aims of reinforcing the battery and preventing puncturing during a crash. Most of the work on battery mechanical safety has concentrated on the external packaging of batteries, with little attention being paid to the enclosed electrolyte. We report on smart multifunctional fluids that act as …
Effects Of Tungsten Addition And Heat Treatment Conditions On Microstructure And Mechanical Properties Of Microalloyed Forging Steels, Jingwei Zhao, Zhengyi Jiang, Chong Soo Lee
Effects Of Tungsten Addition And Heat Treatment Conditions On Microstructure And Mechanical Properties Of Microalloyed Forging Steels, Jingwei Zhao, Zhengyi Jiang, Chong Soo Lee
Faculty of Engineering and Information Sciences - Papers: Part A
In the present work, the effects of tungsten (W) addition and heat treatment conditions on the microstructure, impact toughness and tensile properties of microalloyed forging steels were studied. Four kinds of microalloyed forging steels were produced by varying W additions (0, 0.5, 1 and 2 wt%). Heat treatment was carried out at temperatures ranging from 840 to 950 °C followed by air and furnace cooling. Mechanical tests were used to evaluate the room temperature Charpy impact and tensile properties. The resulting microstructures were analysed via optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show …
Enhancing Mechanical Properties Of A Low-Carbon Microalloyed Cast Steel By Controlled Heat Treatment, Jingwei Zhao, Jeong Hun Lee, Yong Woo Kim, Zhengyi Jiang, Chong Soo Lee
Enhancing Mechanical Properties Of A Low-Carbon Microalloyed Cast Steel By Controlled Heat Treatment, Jingwei Zhao, Jeong Hun Lee, Yong Woo Kim, Zhengyi Jiang, Chong Soo Lee
Faculty of Engineering and Information Sciences - Papers: Part A
In the present work, detailed studies were made on the optimization of microstructure and mechanical properties of a low-carbon microalloyed cast steel through control of heat treatment conditions. Specimens were austenitized at temperatures ranging from 950 to 1200 °C for 2 h followed by different cooling methods (furnace, air and water). For analyzing the effect of holding time on mechanical properties, some cast specimens were austenitized at 1100 °C for different times followed by furnace cooling. After heat treatment, mechanical tests were employed to evaluate the room temperature Charpy impact and tensile properties. The characterization of complex precipitates formed during …
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 …
Modeling And Experimental Investigation On The Mechanical Behavior Of A Spiral-Type Capsule In The Small Intestine, Hao Zhou, Gursel Alici, Trung Duc Than, Weihua Li
Modeling And Experimental Investigation On The Mechanical Behavior Of A Spiral-Type Capsule In The Small Intestine, Hao Zhou, Gursel Alici, Trung Duc Than, Weihua Li
Faculty of Engineering and Information Sciences - Papers: Part A
This paper reports on the study of the behavior of the viscoelastic contact between a spiral-type capsule and the small intestine. Both 2D and 3D simulations show that the traction force, which is due to the pressure difference between the two sides of the spirals, is velocity dependent. With an increase in the sliding velocity, the traction force decreases initially due to the reduced stress relaxation. However, if the velocity reaches some certain magnitude, the reduction in the stress becomes negligibly small. The traction force starts to increase because of the higher stress coming from the higher strain rates. The …
Effects Of Tungsten Addition On The Microstructure And Mechanical Properties Of Microalloyed Forging Steels, Jingwei Zhao, Taekyung Lee, Jeong Hun Lee, Zhengyi Jiang, Chong Soo Lee
Effects Of Tungsten Addition On The Microstructure And Mechanical Properties Of Microalloyed Forging Steels, Jingwei Zhao, Taekyung Lee, Jeong Hun Lee, Zhengyi Jiang, Chong Soo Lee
Faculty of Engineering and Information Sciences - Papers: Part A
In the current study, the effects of tungsten (W) addition on the microstructure, hardness, and room/low [223 K and 173 K (-50 C and -100 C)] temperature tensile properties of microalloyed forging steels were systematically investigated. Four kinds of steel specimens were produced by varying the W additions (0, 0.1, 0.5, and 1 wt pct). The microstructure showed that the addition of W does not have any noticeable effect on the amount of precipitates. The precipitates in W-containing steels were all rich in W, and the W concentration in the precipitates increased with the increasing W content. The mean sizes …