A polycrystal plasticity based thermo-mechanical-dynamic recrystallization coupled modeling method and its application to light weight alloys
A polycrystal plasticity based thermo-mechanical-dynamic recrystallization coupled modeling method and its application to light weight alloys
复制标题
基于多晶塑性的热机械动态再结晶耦合建模方法及其在轻质合金中的应用
DOI：
10.1016/j.ijplas.2019.01.001
复制
发表时间：
2019-05
影响因子：
9.8
通讯作者：
Lee Myoung-Gyu
中科院分区：
文献类型：
--
作者：
Tang Tao;Zhou Guowei;Li Zihan;Li Dayong;Peng Liming;Peng Yinghong;Wu Peidong;Wang Huamiao;Lee Myoung-Gyu
热成形往往不得不求助于加工金属有限的室温成形性，如铝，镁等塑性工作引起的温升，特别是在高应变速率下，可以产生显着的影响，以及变形金属的力学响应和动态再结晶。在本工作中，基于多晶塑性的热-机械-动态再结晶（DRX）耦合方法建立了一个多晶塑性的VPSC-DRX模型中的热-机械效应，晶粒形核和生长模型实施到VPSC框架。通过等温压缩实验标定了与不同滑移模式、温度和应变速率相关的模型参数，建立了硬化和动态再结晶相关参数随温度和应变速率的演化函数。实现了金属热变形过程中塑性变形、织构、晶粒尺寸和温度变化的综合计算。对所提出的方法进行了验证，并应用于模拟三种不同冲压速度下镁合金棒材的热挤压过程。分析了冲压速度对变形织构和晶粒尺寸发展的影响。塑性功引起的温度升高增强了应力软化并刺激了晶粒长大，使材料的宏/微观响应不再随应变率单调变化。
Hot forming often has to be resorted when processing metals with limited room-temperature formability, such as aluminum, magnesium, etc. The temperature rise induced by plastic work, especially under high strain rates, can exert significant effect on mechanical response as well as dynamic recrystallization of deformed metals. In the present work, a polycrystal plasticity based thermo-mechanical-dynamic recrystallization (DRX) coupled approach is established by implementing thermo-mechanical effect in a VPSC-DRX model where a grain nucleation and growth model is implemented into the VPSC framework. The modeling parameters associated with various slip modes, temperatures and strain rates are calibrated by isothermal compression experiments, and then evolution functions of hardening and DRX related parameters with respect to temperature and strain rate are established. The integrated computation of plastic deformation, texture, grain size and temperature update in hot deformation of metals can be achieved. The proposed method is verified and then applied to simulate hot extrusion processes of magnesium alloy bars at three different ram speeds. The influences of ram speed on development of deformation texture and grain size are analyzed. The temperature rise due to plastic work enhances stress softening and stimulates grain growth, makes the macro/micro responses of materials no longer monotonically varied with strain rate.
登录
查看更多内容
DOI：
10.1016/j.msea.2006.06.117
发表时间：
2006-10
影响因子：
6.4
作者：
Y. Uematsu;K. Tokaji;M. Kamakura;K. Uchida;H. Shibata;Norikatsu Bekku
通讯作者：
Y. Uematsu;K. Tokaji;M. Kamakura;K. Uchida;H. Shibata;Norikatsu Bekku
DOI：
10.1088/0965-0393/23/5/055011
发表时间：
2015-06
影响因子：
1.8
作者：
Yichuan Shao;Tao Tang;Dayong Li;Weiqin Tang;Ying-hong Peng
通讯作者：
Yichuan Shao;Tao Tang;Dayong Li;Weiqin Tang;Ying-hong Peng
影响因子：
9.4
作者：
Cram, D. G.;Zurob, H. S.;Hutchinson, C. R.
通讯作者：
Hutchinson, C. R.
影响因子：
1.8
作者：
K. S. Nair;M. Mittal;R. Sikand;A. Gupta
通讯作者：
K. S. Nair;M. Mittal;R. Sikand;A. Gupta
影响因子：
9.4
作者：
H. Watanabe;T. Mukai;M. Kohzu;Shigenori Tanabe;K. Higashi
通讯作者：
H. Watanabe;T. Mukai;M. Kohzu;Shigenori Tanabe;K. Higashi