Visco-plastic self-consistent modeling of crystallographic texture evolution related to slip systems activated during machining Ti-6AL-4V
Visco-plastic self-consistent modeling of crystallographic texture evolution related to slip systems activated during machining Ti-6AL-4V
复制标题
与加工 Ti-6AL-4V 期间激活的滑移系统相关的晶体织构演化的粘塑性自洽建模
DOI：
10.1016/j.jallcom.2020.157336
复制
发表时间：
2021
影响因子：
6.2
通讯作者：
Liu, Zhanqiang
中科院分区：
文献类型：
--
作者：
Wang, Qingqing;Shankar, Ravi M.;Liu, Zhanqiang
探索织构变化与滑移系统激活之间的相互关系，对于钛铝钒合金加工过程中织构的产生和控制具有重要意义。结合取向成像显微镜(OIM)和粘塑性自洽框架(VPSC)研究了Ti-6Al-4V合金加工过程中晶体织构的演化和不同滑移系统的激活。采用考虑五个滑移族激活和六方密排(HCP)钛组织孪生的VPSC模型，结合有限元切削仿真模型，模拟了Ti-6Al-4V材料在加工过程中的织构变化。用光学显微镜研究了Ti-6Al-4V在切屑和已加工表面的晶体织构演化。Ti-6Al-4V的两种初始织构产生了相同的末端织构，即强烈的C纤维织构。最后，对VOCE硬化参数进行了修正，以控制滑移模式和孪生模式的激活，并对VPSC的织构和力学性能模拟结果进行了校正。研究发现，在Ti-6Al-4V的加工过程中，棱柱体、基面、棱锥体和二阶棱锥体<；c+a>；滑移系的组合导致了C形剪切织构的产生。二阶滑移系的激活对C剪切织构的形成有很大贡献，与初始织构和加工参数无关。结果表明，在Ti-6Al-4V材料的加工过程中，滑移系的激活及其相关活动依赖于剪切变形。这一发现对控制Ti-6Al-4V变形过程中的织构变化具有重要意义。
Exploring the interconnection between texture variation and the activations of slip systems is vital for the texture generation and controlling during machining of Ti-6AL-4V. The evolution of crystallographic texture and the activations of different slip systems during machining of Ti-6AL-4V were studied combined with the orientation imaging microscopy (OIM) and visco-plastic self-consistent (VPSC) framework. A VPSC model considering the activations of five slip families as well as twinning of hexagonal close packed (HCP) Ti structure and coupled with a finite element cutting simulation model were used to simulate the texture variations during machining of Ti-6AL-4V. Crystallographic texture evolutions of Ti-6AL-4V in chips and machined surface were examined using OIM. Two initial textures of Ti-6AL-4V yielded the same end texture, a strong C fiber texture. Lastly, Voce hardening parameters were modified to control the activations of slip modes as well as twinning and calibrate the VPSC simulation results of texture and mechanical property. It is found that the combination of prismatic , basal , pyramidal and 2-nd order pyramidal <c+a> slip systems induce the generation of C shear texture in machining of Ti-6AL-4V. The activation of 2-nd order <c+a> slip system makes large contribution to the formation of C shear texture irrespective of the initial textures and machining parameters. The result demonstrates that activations of slip systems and their relative activities depend on the shear deformation in machining of Ti-6AL-4V. This finding is important to control the texture variation in the deformation of Ti-6AL-4V.
影响因子：
9.4
作者：
S. Basu;Zhiyu Wang;C. Saldana
通讯作者：
S. Basu;Zhiyu Wang;C. Saldana
DOI：
10.1007/s11661-014-2672-8
发表时间：
2015
期刊：
Metallurgical and Materials Transactions A
影响因子：
--
作者：
S. Basu;M. Ravi Shankar
通讯作者：
M. Ravi Shankar
加工过程中的微观结构纹理预测
DOI：
--
发表时间：
2016
期刊：
影响因子：
--
作者：
O. Fergani;Z. Pan;S. Liang;Z. Atmani;T. Welo
通讯作者：
T. Welo