Constitutive Modeling of the Mechanical Properties of V-added Medium Manganese TRIP Steel
Constitutive Modeling of the Mechanical Properties of V-added Medium Manganese TRIP Steel
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DOI：
10.1007/s11661-013-1648-4
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发表时间：
2013-07-01
影响因子：
2.8
通讯作者：
De Cooman, Bruno C.
中科院分区：
文献类型：
--
作者：
Lee, Seawoong;Estrin, Yuri;De Cooman, Bruno C.
本文研究了一种成分为Fe-0.08%C-6.15%Mn-1.5%Si-2.0%Al-0.08%V的中锰相变诱发塑性钢。在1013 K（740 A ℃）的亚温退火后，钢中含有粗晶铁素体和两个超细晶（UFG）相：铁素体和残留奥氏体。该材料没有变形的局部吕德斯带传播：它没有遭受这个主要问题，因为大多数UFG钢。局部化的塑性流动被证明是抑制，因为一系列因素，包括双峰晶粒尺寸分布，多相显微组织，纳米尺寸的碳化钒沉淀物的存在下，和残余奥氏体的变形诱导马氏体相变的发生。一个本构模型，将这些影响的开发。该模型被用来识别的因素，可以导致进一步提高的力学性能的UFG中锰TRIP钢。
In this study, medium Mn transformation-induced plasticity steel with the composition Fe-0.08 pct C-6.15 pct Mn-1.5 pct Si-2.0 pct Al-0.08 pct V was investigated. After intercritical annealing at 1013 K (740 A degrees C), the steel contained coarse-grained ferrite and two ultrafine-grained (UFG) phases: ferrite and retained austenite. The material did not deform by localized Luders band propagation: it did not suffer from this major problem as most UFG steels do. Localization of plastic flow was shown to be suppressed because of a combination of factors, including a bimodal grain size distribution, a multiphase microstructure, the presence of nanosized vanadium carbide precipitates, and the occurrence of the deformation-induced martensitic transformation of retained austenite. A constitutive model incorporating these effects was developed. The model was used to identify the factors which can lead to a further improvement of the mechanical properties of the UFG medium Mn TRIP steels.