An Experimental Study on Evolution of Grain-Scale Stress/Strain and Geometrical Necessary Dislocations in Advanced TA15 Titanium Alloy during Uniaxial Tension Deformation
An Experimental Study on Evolution of Grain-Scale Stress/Strain and Geometrical Necessary Dislocations in Advanced TA15 Titanium Alloy during Uniaxial Tension Deformation
复制标题
先进TA15钛合金单轴拉伸变形过程中晶粒应力/应变和几何必要位错演化的实验研究
DOI：
10.1002/adem.201600306
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发表时间：
2017
影响因子：
3.6
通讯作者：
Zaefferer Stefan
中科院分区：
文献类型：
--
作者：
He Dong;Yasmeen Tabassam;Li Qiang;Li Hong;Zaefferer Stefan
研究了TA15钛合金在室温拉伸变形过程中的晶界应力应变和几何必要位错的空间分布特征。用电子背散射衍射仪(EBSD)研究了不同应变下的显微组织。通过对高角分辨率EBSD图样的分析，揭示了晶间应力应变的演化规律。利用自行开发的程序计算了GND的空间分布。结果表明，塑性变形过程中晶级残余应力应变和GND的空间分布受多种因素的影响，且主导因素随微观组织特征和宏观变形参数的变化而变化。
This study aims to characterize the spatial distributions of grain‐scale stress/strain and geometrical necessary dislocations (GNDs) in TA15 titanium alloy subjected to tensile deformation at room temperature. The microstructures under different strains are investigated through electron backscatter diffraction (EBSD) measurements. Evolution of intergranular stress/strain is revealed by analysis of high angular resolution EBSD patterns. The spatial distributions of GNDs are calculated using a self‐developed routine. Results indicate that many factors influence the spatial distributions of grain‐scale residual stress/strain and GNDs during plastic deformation, and the dominant factor varies with the changes in microstructure characteristics and macroscopic deformation parameters.