METALS AND METAL MATRIX COMPOSITES |
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PFM-FEM Based Simulation of Multi-Variant Martensitic Transformation Process and Sensitivity Analysis of Model Parameters |
LI Chang, GAO Jingxiang, ZHANG Dacheng, YU Zhibin, HAN Xing
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School of Mechanical Engineering and Automation, University of Science and Technology Liaoning, Anshan 114051 |
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Abstract It is generally recognized that accurate acquisition of the microscopic representation of the martensite transformation process is crucial for obtaining the best performance of the material and exceedingly significant in the field of material design. There are multiple parameters that exert influence on the transformation process of martensite. Accordingly, the key to precisely grasp the transformation mechanism of martensite lies in the quantitative analysis of the sensitivity of each parameter to the influence of martensite transformation. In this work, we employed phase field method to deduce the phase field equation of martensite transformation from metastable to steady state. Then, the solutions of the equation were figured out by finite element method, and the solution results were visualized as well. The variation curve of order parameter at various positions during martensite nucleation and growth were obtained, which revealed the nucleation growth law and dynamic variation characteristics of martensite transformation. On this basis, we designed an orthogonal test and quantitatively evaluated the impact and sensitivity degree of diverse parameters on martensitic transformation by response surface method. This study effectively expounded and determined the martensite transformation law and realized the quantitative evaluation of the martensite transformation process. It also provides a valuable approach to determine the law of martensite transformation and acquire the optimal process parameters, paving the way for improving the mechanical properties of materials.
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Published: 29 August 2019
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About author:: Chang Li, associate professor, School of Mechanical Engineering and Automation, Liaoning University of Science and Technology, Master Instructor. Graduated from the School of Mechanical Engineering and Automation of Northeastern University with a Ph.D, in Mechanical Design and Theory in January 2009. Mainly engaged in mechanical reliability engineering, modern transmission and digital design, aerospace gear transmission system, rolling bearing service damage mechanism reliability analysis and dynamic optimization, welding reliability and metal large plastic deformation micro-characterization reliability test method, parallel, series robot mechanism motion accuracy reliability analysis, laser cladding, laser quenching, laser cleaning, supersonic spraying, flame spraying, welding, surfacing and other metal surface advanced manufacturing technology research. He was selected as one of the thousand-level candidates for Liaoning Province’s "Millions of Talents Project" and Liaoning Province's Supporting Plan for Excellent Talents in Colleges and Universities. He has published 52 articles in important journals at home and abroad, including 39 SCI/EI searches, 8 invention patents, 15 utility model patents and 2 software copyrights, and published a monograph. |
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