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Study on the Transformation Mechanism of Twinning Martensite and the Growth Behavior of Variants Based on Phase‐Field Method
Steel Research International ( IF 2.2 ) Pub Date : 2020-06-09 , DOI: 10.1002/srin.202000142
Jingxiang Gao 1 , Chang Li 1 , Dacheng Zhang 1 , Xing Han 1
Affiliation  

Martensite is a common metallographic structure. Accurately revealing the objective law of the martensite transformation process is of great significance for controlling material organization and design materials. Herein, based on the phase‐field method, a 3D three‐variant martensite transformation model from the metastable to steady state is established based on the Khachaturyan. A. G. dislocation dynamic model. The transformation mechanism of martensite is analyzed and the transformation law and the law of growth behavior of variants is obtained. The research reveals the growth mechanism of martensite in multivariant martensite transformation, verifies the microstructure of steel after the quenching process, and proposes the “phagocytic” behavior of martensite transformation process and the prediction method of transforming variants. Finally, an interpretation of the interface fluctuations and residual austenite appearing during the transformation process is made. Herein, the objective law of martensite transformation is revealed, the universal prediction of martensite transformation morphology is realized, and an important theoretical basis for quenching tissue regulation and large‐scale high‐precision phase‐transition simulation is provided.

中文翻译:

基于相场法的孪晶马氏体相变机理和变体的生长行为研究

马氏体是一种常见的金相组织。准确揭示马氏体相变过程的客观规律对控制材料组织和设计材料具有重要意义。在此,基于相场方法,基于Khachaturyan建立了从亚稳态到稳态的3D三变量马氏体转变模型。AG脱位动力学模型。分析了马氏体的相变机理,得到了相变规律和变体的生长行为规律。研究揭示了马氏体在多相马氏体相变中的生长机理,验证了淬火后钢的显微组织,并提出了马氏体相变过程的“吞噬”行为和相变预测方法。最后,解释了在转变过程中出现的界面波动和残余奥氏体。揭示了马氏体相变的客观规律,实现了马氏体相变形态的普遍预测,为淬火组织调控和大规模高精度相变模拟提供了重要的理论基础。
更新日期:2020-06-09
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