Effect of Allotropic Transformation on Plasticity of Fe-15Mn-10Al-0.3C Dual Phase Steel during Annealing

被引：0
|
作者：
Liu Y. [1 ,2 ]
Wang B. [1 ,2 ]
Liu R. [3 ]
Guo J. [3 ]
Shi W. [1 ,2 ]
机构：
[1] School of Materials Science and Engineering, Shanghai University, Shanghai
[2] State Key Laboratory of Advanced Special Steel, Shanghai
[3] Technology Center of Ansteel Institute, Anshan
来源：
Cailiao Yanjiu Xuebao/Chinese Journal of Materials Research | 2019年 / 33卷 / 11期
关键词：
Allotropic transformation; Dislocation glide; Double cold rolling; Metallic materials; Orientation relationship;
D O I：
10.11901/1005.3093.2019.136
中图分类号：
学科分类号：
摘要：
The evolution of microstructure and properties of Fe-15Mn-10Al-0.3C steel during static annealing after different cold rolling treatments was investigated. The microstructure and properties of the test steel were characterized by means of SEM, XRD and EBSD. The results show that during the annealing process, the austenite bands undergo obvious allotropic transformation, whilst γ -phase transforms to α-phase and the amount of transformation increases with annealing time. The isomeric transformation affects the tensile deformation behavior of the annealed steel, the orientation relationship between the α-phase and the γ-phase changed from the neighbor relationship to the K-S with the prolongation of annealing time, which is beneficial to dislocation sliding across phase boundary and improves plasticity. When the annealing time is long enough, the K-S relationship between the two phases loses coherent and the plasticity is reduced. The transformation can regulate the parallelism of the slip system between the α-ferrite and the γ-austenite, which can improve the plasticity of Fe-Mn-Al-C steel. © All right reserved.
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页码：837 / 847
页数：10
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