马氏体
形状记忆合金
材料科学
晶体孪晶
微观结构
梅克尔
合金
正交晶系
相(物质)
冶金
结晶学
晶体结构
化学
有机化学
作者
Saeid Amini,Mohsen Rezaee-Hajidehi,S. Stupkiewicz
标识
DOI:10.1016/j.commatsci.2023.112472
摘要
Needle-like twins are observed experimentally within the transition layer at the martensite-twinned martensite interface. We utilize a phase-field approach to investigate this microstructure. Our goal is to simulate the morphology of the transition layer and to perform a detailed analysis to characterize its interfacial and elastic micro-strain energy. To illustrate the micromechanical framework developed for that purpose, sample computations are carried out for a CuAlNi shape memory alloy undergoing the cubic-to-orthorhombic martensitic transformation. A particular focus of the study is on size-dependent morphology through examining the impact of twin spacing. Additionally, our results reveal that certain twin volume fractions lead to the emergence of twin branching, as a way to minimize the total free energy stored in the microstructure.
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