Wang Yuhui, Shi Baodong, He Yanming, Zhang Hongwang, Peng Yan, Wang Tiansheng
State Key Laboratory of Metastable Materials Science and Technology, Yanshan University, Qinhuangdao 066004, China.
National Engineering Research Center for Equipment and Technology of Cold Strip Rolling, Yanshan University, Qinhuangdao 066004, China.
Materials (Basel). 2018 Feb 7;11(2):253. doi: 10.3390/ma11020253.
A Fe-34.5 wt % Mn-0.04 wt % C ultra-high Mn steel with a fully recrystallised fine-grained structure was produced by cold rolling and subsequent annealing. The steel exhibited excellent cryogenic temperature properties with enhanced work hardening rate, high tensile strength, and high uniform elongation. In order to capture the unique mechanical behaviour, a constitutive model within finite strain plasticity framework based on Hill-type yield function was established with standard Armstrong-Frederick type isotropic hardening. In particular, the evolution of isotropic hardening was determined by the content of martensite; thus, a relationship between model parameters and martensite content is built explicitly.
通过冷轧及后续退火制备了一种具有完全再结晶细晶组织的Fe-34.5 wt% Mn-0.04 wt% C超高锰钢。该钢表现出优异的低温性能，具有增强的加工硬化率、高抗拉强度和高均匀伸长率。为了捕捉其独特的力学行为，基于Hill型屈服函数在有限应变塑性框架内建立了本构模型，并采用标准的阿姆斯特朗-弗雷德里克型各向同性硬化。特别地，各向同性硬化的演化由马氏体含量决定；因此，明确建立了模型参数与马氏体含量之间的关系。
