材料科学技术(英文版)2021，Vol.90Issue(31) ：168-182.

Phase field simulation of the stress-induced α microstructure in Ti-6Al-4 V alloy and its CPFEM properties evaluation

Jinhu Zhang Xuexiong Li Dongsheng Xu Chunyu Teng Hao Wang Liang Yang Hongtao Ju Haisheng Xu Zhichao Meng Yingjie Ma Yunzhi Wang Rui Yang
材料科学技术(英文版)2021，Vol.90Issue(31) ：168-182.
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  • NSTL
  • 万方数据

Phase field simulation of the stress-induced α microstructure in Ti-6Al-4 V alloy and its CPFEM properties evaluation

Jinhu Zhang 1Xuexiong Li 1Dongsheng Xu 2Chunyu Teng 3Hao Wang 1Liang Yang 1Hongtao Ju 2Haisheng Xu 2Zhichao Meng 2Yingjie Ma 2Yunzhi Wang 4Rui Yang2
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作者信息

  • 1. Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China
  • 2. Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;Shi-changxu Innovation Center for Advanced Materials,Institute of Metal Research,Chinese Academy of Sciences,Shenyang 110016,China;School of Materials Science and Engineering,University of Science and Technology of China,Shenyang 110016,China
  • 3. China Aero-Polytechnology Establishment,Beijing 100028,China
  • 4. Department of Materials Science and Engineering,The Ohio State University,2041 College Road,Columbus,OH 43210,United States
  • 折叠

Abstract

Variant selection under specific applied stresses during precipitation of α plates from prior-β matrix in Ti-6Al-4 V was investigated by 3D phase field simulations.The model incorporates the Burgers transfor-mation path from β to α phase,with consideration of interfacial energy anisotropy,externally applied stresses and elastic interactions among α variants and β matrix.The Gibbs free energy and atomic mo-bility data are taken from available thermodynamic and kinetic databases.It was found that external stresses have a profound influence on variant selection,and the selection has a sensitive dependence,as evidenced by both interaction energy calculations and phase field simulations.Compared with normal stresses,shear stresses applied in certain directions were found more effective in accelerating the trans-formation,with a stronger preference to fewer variants.The volume fractions of various α variants and the final microstructure were determined by both the external stress and the elastic interaction among different variants.The α clusters formed by variants with Type2 misorientation ([11-20]/60°) relation were found more favored than those with Type4 ([1055-3]/63.26°) under certain applied tensile stress such as along < 111 >β.The mechanical properties of different microstructures from our phase field simu-lation under different conditions were calculated for different loading conditions,utilizing crystal plastic finite element simulation.The mechanical behavior of the various microstructures from phase field sim-ulation can be evaluated well before the alloys are fabricated,and therefore it is possible to select mi-crostructure for optimizing the mechanical properties of the alloy through thermomechanical processing based on the two types of simulations.

Key words

Titanium alloy/Phase transformation/Microtexture/Mechanical evaluation/Phase field/Crystal plasticity finite element

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基金项目

National Key Research and Development Program of China(2016YFB0701304)

National Key Research and Development Program of China(2016YFC0304200)

Strategic Priority Research Program of Chinese Academy of Sciences(XDC01040100)

Special Project on Information Technology of the Chinese Academy of Sciences(XXH13506-304)

CAS-Shenyang Supercomputing Center and the Doctoral Scientific Research Foundation of Liaoning Province(20180540133)

出版年

2021
材料科学技术(英文版)
中国金属学会 中国材料研究学会 中国科学院金属研究所

材料科学技术(英文版)

CSTPCDCSCDSCI
影响因子：0.657
ISSN：1005-0302
参考文献量68
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