Role of {332}<113> twinning on adiabatic shear behavior during dynamic loading in β-type Ti-15Mo alloy

被引：3
作者：
Dai, Jincai [1 ]
Min, Xiaohua [1 ]
机构：
[1] Dalian Univ Technol, Sch Mat Sci & Engn, 2 Linggong Rd, Dalian 116024, Peoples R China
来源：
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING | 2024年 / 912卷
基金：
中国国家自然科学基金;
关键词：
beta-type titanium alloy; TWIP effect; Adiabatic shear band; High strain rate; Dynamic recrystallization; TRANSFORMATION-INDUCED PLASTICITY; MICROSTRUCTURAL EVOLUTION; DEFORMATION; LOCALIZATION; COMPRESSION;
D O I：
10.1016/j.msea.2024.146963
中图分类号：
TB3 [工程材料学];
学科分类号：
0805 ; 080502 ;
摘要：
The microstructural evolution and formation mechanism of the adiabatic shear band (ASB) in {332}<113> twinning-induced plasticity (TWIP) Ti-15Mo alloy were investigated by applying stopper rings in a split Hopkinson pressure bar apparatus. Accompanied by activation of numerous {332}<113> twins, ASB consisting of elongated fine-grains initiated in the dynamically compressed sample with 0.28 true strain. Multiple twins adjacent to the ASB region were severely distorted and refined along the shear direction. Further deformation led to refinement of elongated twins into elongated subgrains, then some of them were subdivided into equiaxed fine-grains. The morphology of the fine-grains within the ASB underwent a complete transition from elongated to equiaxed as the strain increased to 0.33. The equiaxed fine-grains exhibited a random distribution of orientation, which was regarded as the result of dynamic recrystallization. The formation of equiaxed fine-grains was found to obey rotational dynamic recrystallization mechanism through the thermodynamic and kinetic calculations.
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页数：13
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