CAJ | 학술논문

通过晶体塑性有限元与电子背散射衍射（EBSD ）技术相结合的方法，实现 T A15钛合金相变点以上高温压缩变形的晶体塑性有限元模拟。采用元胞自动机方法获得了晶粒的初始形貌，通过用户子程序UMAT将基于率相关晶体塑性本构方程嵌入到软件ABAQUS中。模拟结果显示， TA15合金热压缩变形组织呈明显的形变不均匀特征，模型中晶粒内部应力应变分布不均匀。不同晶粒滑移系的开动不同，即使在同一晶粒内部，也存在滑移系开动不同步的情况。采用电子背散射衍射（EBSD ）技术对T A15钛合金的热压缩变形组织的变形不均匀特征进行了验证。
통과정체소성유한원여전자배산사연사（EBSD ）기술상결합적방법，실현 T A15태합금상변점이상고온압축변형적정체소성유한원모의。채용원포자동궤방법획득료정립적초시형모，통과용호자정서UMAT장기우솔상관정체소성본구방정감입도연건ABAQUS중。모의결과현시， TA15합금열압축변형조직정명현적형변불균균특정，모형중정립내부응력응변분포불균균。불동정립활이계적개동불동，즉사재동일정립내부，야존재활이계개동불동보적정황。채용전자배산사연사（EBSD ）기술대T A15태합금적열압축변형조직적변형불균균특정진행료험증。
A crystal plasticity finite element model (CPFEM ) and the technology of EBSD have been developed to investigate the activation of the slip systems during compression of T A15 polycrystal at the temperature of 1 050℃ and the strain rate 0.01 s-1 . The constitutive equations based on rate‐dependent crystal plasticity were embedded in the software ABAQUS .The results show that , the activation of the slip system are quite different .Both strain and stress show nonuniformity in and out the grains due to the nonuniformity of the activation of the slip systems .The inhomogeneous characteristics of TA15 alloy hot deformation are ob‐served with electron backscatter diffraction (EBSD) .