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陈国兴,刘才溢.Ti-6Al-4V钛合金组成相微观变形行为影响因素[J].稀有金属材料与工程(英文),2020,49(11):3662~3668.[Chen Guoxing and Liu Caiyi.Influencing Factors of Micro Deformation Behavior of Constituent Phases in Ti-6Al-4V Titanium Alloy[J].Rare Metal Materials and Engineering,2020,49(11):3662~3668.]
Influencing Factors of Micro Deformation Behavior of Constituent Phases in Ti-6Al-4V Titanium Alloy
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Received:October 14, 2019  Revised:November 14, 2019
DOI:
Key words: Ti-6Al-4V alloy  Tension at ambient temperature  Micro deformation  Stress ratio  Strain ratio
Foundation item:湖北理工学院人才引进项目
Author NameAffiliation
Chen Guoxing and Liu Caiyi  
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Abstract:
      In this paper, A micro-mechanics finite element model is established based on the realistic microstructure of Ti-6Al-4V alloy. And considering the dual-phase characteristic, the micro deformation behaviors during the uniaxial tension at ambient temperature are studied. The results show that the hard transformed β matrix (βt) in Ti-6Al-4V alloy bears most external loading force, while the external load deformation is mainly carried out by the soft primary α phase (αp). The strain and stress distribution in different regions within the same phase are also strongly asymmetrical. With the increase of the macro-strain, the strain ratio of αp to βt and the stress ratio of βt to αp are basically unchanged at first, then increase rapidly, and finally maintain stability. The volume fraction and grain size of αp have a significant effect on the strain and stress distribution in the constituent phases. With the increases of volume fraction or the decreases of grain size, the strain ratio and the stress ratio increases and decreases, respectively.