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Deformation-induced martensite in austenitic stainless steels: A review
Archives of Civil and Mechanical Engineering ( IF 4.4 ) Pub Date : 2020-10-08 , DOI: 10.1007/s43452-020-00130-1
Mohammad Javad Sohrabi , Meysam Naghizadeh , Hamed Mirzadeh

Recent progress in the understanding of the deformation-induced martensitic transformation, the transformation-induced plasticity (TRIP) effect, and the reversion annealing in the metastable austenitic stainless steels are reviewed in the present work. For this purpose, the introduced methods for the measurement of martensite content are summarized. Moreover, the austenite stability as the key factor for controlling the austenite to martensite transformation is critically discussed. This is realized by analyzing the effects of chemical composition, initial grain size, applied strain, deformation temperature, strain rate, and deformation mode (stress state). For instance, the effect of initial grain size is found to be complicated, especially in the ultrafine grained (UFG) regime. Furthermore, it seems that there is a critical grain size for changing the trend of α′-martensite formation. Decreasing the deformation temperature motivates the formation of α′-martensite, but there is a critical temperature for achieving the maximum tensile ductility. Afterwards, the modeling techniques for the transformation kinetics and the contribution of deformation-induced martensitic transformation to the strengthening of material and also strength-ductility trade-off are critically surveyed. The processing of UFG microstructure during reversion annealing, the effects of the recrystallization of the retained austenite, the martensitic shear and diffusional reversion mechanisms, and the annealing-induced martensitic transformation are also summarized. Accordingly, this overview presents the opportunities that the strain-induced martensitic transformation can offer for controlling the microstructure and mechanical properties of metastable austenitic stainless steels.



中文翻译:

奥氏体不锈钢中的变形诱发马氏体:综述

本文对亚稳态奥氏体不锈钢中的形变诱发马氏体相变,相变诱发塑性(TRIP)效应和回复退火的理解进行了综述。为此,总结了介绍的马氏体含量测量方法。此外,对奥氏体稳定性作为控制奥氏体向马氏体相变的关键因素进行了严格的讨论。这是通过分析化学成分,初始晶粒尺寸,施加的应变,变形温度,应变速率和变形模式(应力状态)的影响来实现的。例如,发现初始晶粒尺寸的影响是复杂的,尤其是在超细晶粒(UFG)制度中。此外,似乎存在改变α'马氏体形成趋势的临界晶粒尺寸。降低变形温度会促使α'马氏体的形成,但要达到最大的拉伸延展性,则存在临界温度。然后,严格研究了相变动力学的建模技术,以及变形诱发的马氏体相变对材料强化的贡献以及强度-延展性的权衡。还总结了UFG显微组织在回复退火过程中的处理,残余奥氏体再结晶的影响,马氏体剪切和扩散回复机制以及退火引起的马氏体相变。因此,

更新日期:2020-10-08
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