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Articles 1 - 15 of 15
Full-Text Articles in Engineering
Metaheuristic Multiobjective Optimization In Steel Welds, Muruganant Marimuthu
Metaheuristic Multiobjective Optimization In Steel Welds, Muruganant Marimuthu
Muruganant Marimuthu
Strength and toughness of steel welds have always been considered as inversely related. This contradicting combination of these properties has made it difficult for designers to achieve an optimum combination. Optimizing the control variables like chemistry and process parameters for obtaining highest combination of strength and toughness is the target of this research. Nondominated Sorting Genetic Algorithms (NSGA) was used to arrive at the pareto-front. It was observed that for the interpass temperatures 150, 200, and 250°C the manganese concentration was decreased while increasing the nickel concentrations. However, for interpass temperatures greater than 200°C, the concentration of manganese was increased …
Reactive Gas Shielding During Laser Surface Alloying For Production Of Hard Coatings, S. Babu, S. Kelly, Muruganant Marimuthu, R. Martukanitz
Reactive Gas Shielding During Laser Surface Alloying For Production Of Hard Coatings, S. Babu, S. Kelly, Muruganant Marimuthu, R. Martukanitz
Muruganant Marimuthu
No abstract provided.
Influence Of Ti/N Ratio On Simulated Cghaz Microstructure And Toughness In X70 Steels, Z X. Zhu, M Marimuthu, L Kuzmikova, H J. Li, F Barbaro, L Zheng, M Z. Bai, C Jones
Influence Of Ti/N Ratio On Simulated Cghaz Microstructure And Toughness In X70 Steels, Z X. Zhu, M Marimuthu, L Kuzmikova, H J. Li, F Barbaro, L Zheng, M Z. Bai, C Jones
Muruganant Marimuthu
Three API 5L X70 steels with different Ti and N contents and otherwise identical chemistry were selected to investigate the effect of Ti/N ratio on the toughness in coarse grained heat affected zone (CGHAZ). A Gleeble 3500 thermomechanical simulator was used to simulate the thermal profile of CGHAZ of double submerged arc welding process. The microstructure was examined by optical microscopy. Statistics of CGHAZ grain coarsening were compiled by measuring the prior austenite grain size. Toughness of the simulated CGHAZ regions was evaluated by Charpy V-notch testing at -20 and -40°C. Morphology of the impact fracture surface was investigated using …
Materials Modeling: A Directive Tool Towards Innovation, M Murugananth
Materials Modeling: A Directive Tool Towards Innovation, M Murugananth
Muruganant Marimuthu
No abstract provided.
Effect Of Ti And N Concentrations On Microstructure And Mechanical Properties Of Microalloyed High Strength Line Pipe Steel Welds, Leigh Fletcher, Zhixiong Zhu, Marimuthu Murugananth, Lei Zheng, Mingzhuo Bai, Huijun Li, F Barbaro
Effect Of Ti And N Concentrations On Microstructure And Mechanical Properties Of Microalloyed High Strength Line Pipe Steel Welds, Leigh Fletcher, Zhixiong Zhu, Marimuthu Murugananth, Lei Zheng, Mingzhuo Bai, Huijun Li, F Barbaro
Muruganant Marimuthu
A selection of nine heats of line pipe steel from the same project with different Ti and N content were used to evaluate the effects of Ti/N ratio on weld zone microstructure, hardness and prior austenite grain size (PAGS) in the coarse grained heat-affected zone (CGHAZ). It was shown that the microstructure of the base metal (BM) mainly consisted of fine grained polygonal ferrite with fine islands of pearlite. The weld metal (WM) microstructure was predominantly acicular ferrite with a small volume fraction of pro-eutectoid ferrite. The CGHAZ consisted of bainitic ferrite and islands of martensite-austenite. The inside region of …
Modeling Mechanical Properties In Dual Phase Steels, Himanshu Panjiar, R Thyagarajan, M Murugananth, Sumitesh Das, Karamveer Singh
Modeling Mechanical Properties In Dual Phase Steels, Himanshu Panjiar, R Thyagarajan, M Murugananth, Sumitesh Das, Karamveer Singh
Muruganant Marimuthu
No abstract provided.
Artificial Neural Networks In Materials Modeling, Muruganant Marimuthu
Artificial Neural Networks In Materials Modeling, Muruganant Marimuthu
Muruganant Marimuthu
No abstract provided.
Deploying Cpu Load Balancing In The Linux Cluster Using Non-Repetitive Cpu Selection, M. Shoaib Jameel, Muruganant Marimuthu, Tejbanta Chingtham
Deploying Cpu Load Balancing In The Linux Cluster Using Non-Repetitive Cpu Selection, M. Shoaib Jameel, Muruganant Marimuthu, Tejbanta Chingtham
Muruganant Marimuthu
Maintaining load balancing in a computingcluster is an evident problem in distributed systems andresearch in this field is not new. The challenges in designing theload balancing algorithms are immense. This paper lists some ofthose challenges in the design of CPU load balancing algorithmand provides solutions to some of them. The algorithmconsiders one node in the cluster as the Master Server andanother as the Load Balancer. The master server maintains theCPU and IP information of each machine. The nodes in thecluster send their CPU status and IP information to the masterserver after every 30 seconds. The implementation solves“readers-writers” problem exclusively using …
Delta Trip Steel, S. Chatterjeea, Muruganant Marimuthu, H. Bhadeshi
Delta Trip Steel, S. Chatterjeea, Muruganant Marimuthu, H. Bhadeshi
Muruganant Marimuthu
No abstract provided.
Thermomechanical Behavior Of Nickel Base Single Crystal Superalloy Towards Understanding Of Weld Hot Cracking, S S. Babu, J M. Vitek, S A. David, M Murugananth
Thermomechanical Behavior Of Nickel Base Single Crystal Superalloy Towards Understanding Of Weld Hot Cracking, S S. Babu, J M. Vitek, S A. David, M Murugananth
Muruganant Marimuthu
"Thermomechanical responses of three single crystal superalloys were measured in between 600 and 1200 degrees C using a thermomechanical simulator. On-heating results showed no softening while testing below 1000 degrees C. In contrast, extensive softening was observed while testing above 1000 degrees C. This rapid softening is related to dissolution of gamma' precipitates. During on-cooling tests from 1300 degrees C, strength recovery of these samples occurred only below 900 degrees C. The delay in strength recovery is attributed to the extent of undercooling required for rapid decomposition of the gamma phase into mixture of gamma and gamma' phases."
Effect Of 30 T Magnetic Field On Transformations In A Novel Bainitic Steel, Muruganant Marimuthu, H.K.D.H Bhadeshia, S Babu, J Wilgen, D Nicholson, R Jaramillo, G Ludtka, R Kisner, G Mackiewicz-Ludtka, S Kelly
Effect Of 30 T Magnetic Field On Transformations In A Novel Bainitic Steel, Muruganant Marimuthu, H.K.D.H Bhadeshia, S Babu, J Wilgen, D Nicholson, R Jaramillo, G Ludtka, R Kisner, G Mackiewicz-Ludtka, S Kelly
Muruganant Marimuthu
The continuous cooling transformation characteristics of novel bainitic steels have been studied, both under ordinary conditionsand whilst subjected to a 30 T magnetic field. The magnetic field has been found to completely change the microstructure obtained,from a mixture of bainite and martensite to one containing an incredibly fine pearlite with an interlamellar spacing of about 50 nm.As a consequence, the pearlite is found to be much harder than any other examples found in the published literature.
Strength-Toughness Optimization In Steel Welds, M Murugananth
Strength-Toughness Optimization In Steel Welds, M Murugananth
Muruganant Marimuthu
No abstract provided.
Application Of Computational Thermodynamic And Kinetic Models To Laser Surface Alloying, S S. Babu, S M. Kelly, R P. Martukanitz, M Murugananth
Application Of Computational Thermodynamic And Kinetic Models To Laser Surface Alloying, S S. Babu, S M. Kelly, R P. Martukanitz, M Murugananth
Muruganant Marimuthu
Surface physical and mechanical properties can be tailored to different needs by the laser surface alloying process. These property modifications are made by localized melting of substrate material by laser beams with addition of alloying elements as well as hard particles. Through selection of proper hard particles, modification of underlying microstructure through rapid cooling and controlled alloying addition, one can tailor these surfaces for required properties. However, these processes are developed through extensive experimental trial-anderror methodology. This research shows an alternate design methodology by which these processes can be designed through computational thermodynamic and kinetic models.
Thermomechanical Testing Of Nickel Base Superalloy Single Crystals, S S. Babu, J M. Vitek, S A. David, M Murugananth
Thermomechanical Testing Of Nickel Base Superalloy Single Crystals, S S. Babu, J M. Vitek, S A. David, M Murugananth
Muruganant Marimuthu
Thermomechanical response of single crystal superalloys during weld heating and cooling will affect cracking behavior in the heat-affected-zone (HAZ) and weld-metal (WM) regions. Thermomechanical response of these superalloys will depend on the phase fractions of ordered am ma-prime precipitates in the am ma matrix. During weld heating, the am ma-prime precipitates will dissolve as they approach the solvus temperature and some liquation may occur in the interdendritic regions. On cooling, the single-phase gamma matrix will decompose to a mixture of am ma and am ma-prime phases. In this work we evaluated the strength, ductility and reduction in area as a …
Computational Methods In Materials Science, M Murugananth
Computational Methods In Materials Science, M Murugananth
Muruganant Marimuthu
No abstract provided.