Xiang Hao, Van Paepegem Wim, Kestens Leo A I
Department of Electromechanical, Systems and Metal Engineering, Faculty of Engineering and Architecture, Ghent University, Tech-Lane Ghent Science Park-Campus A, Technologiepark Zwijnaarde 46, B-9052 Ghent, Belgium.
Department of Materials, Textiles and Chemical Engineering (MaTCh), Faculty of Engineering and Architecture, Ghent University, Tech-Lane Ghent Science Park-Campus A, Technologiepark Zwijnaarde 46, B-9052 Ghent, Belgium.
Materials (Basel). 2022 Aug 2;15(15):5325. doi: 10.3390/ma15155325.
Formation of a habit plane during martensitic transformation is related to an invariant plane strain transformation, which involves dislocation glide and twins. In the current work, the Phenomenological Theory of Martensitic Transformation (PTMT) is employed to study the crystallographic features while the phase field simulation is used to study the microstructure evolution for martensitic transformation of Ti-6Al-4V alloy. Results show that mechanical constraints play a key role in the microstructure evolution. It is shown that a twinned structure with very small twinned variants is geometrically difficult to form due to the lattice parameters of Ti-6Al-4V alloy. It is concluded that the predicted habit plane from the PTMT is consistent with results of the micro-elastic theory. The formation of a triangular morphology is favored geometrically and elastically.
马氏体相变过程中习惯平面的形成与不变平面应变转变有关，这涉及位错滑移和孪晶。在当前工作中，采用马氏体相变现象学理论（PTMT）来研究晶体学特征，同时利用相场模拟来研究Ti-6Al-4V合金马氏体相变的微观结构演变。结果表明，力学约束在微观结构演变中起关键作用。结果表明，由于Ti-6Al-4V合金的晶格参数，具有非常小的孪晶变体的孪晶结构在几何上难以形成。得出的结论是，PTMT预测的习惯平面与微观弹性理论的结果一致。三角形形态的形成在几何和弹性方面都更有利。
