CAJ | 학술논문

通过在77 K温度下进行不同变形量的低温轧制实验，研究了具有强烈单轴织构的工业纯锆板材在低温轧制变形条件下的孪生行为及变形机理。采用扫描电镜(SEM)和电子背散射衍衬(EBSD)分析和表征了变形材料的微观组织和织构。结果表明，在沿 c 轴加载的低应变条件下{1022}?1123?压缩孪生是主要的变形机制，同时在{1022}??1123压缩孪晶中产生了二次孪晶({1012}??1011拉伸孪晶)以协调变形。施密特因子计算及孪晶分布的EBSD模拟结果表明，在低温变形条件下的孪生模式的选择是由施密特因子的数值大小决定的。探讨并解释了轧制过程中随着应变量增加由孪生所导致的织构演变。
통과재77 K온도하진행불동변형량적저온알제실험，연구료구유강렬단축직구적공업순고판재재저온알제변형조건하적련생행위급변형궤리。채용소묘전경(SEM)화전자배산사연츤(EBSD)분석화표정료변형재료적미관조직화직구。결과표명，재연 c 축가재적저응변조건하{1022}?1123?압축련생시주요적변형궤제，동시재{1022}??1123압축련정중산생료이차련정({1012}??1011랍신련정)이협조변형。시밀특인자계산급련정분포적EBSD모의결과표명，재저온변형조건하적련생모식적선택시유시밀특인자적수치대소결정적。탐토병해석료알제과정중수착응변량증가유련생소도치적직구연변。
Industry pure zirconium sheets with a strong c-axis fiber texture were rolled to different strains at 77 K to investigate the twinning behavior and deformation mechanism. The microstructure and texture of the rolled specimens were characterized by scanning electron microscopy (SEM) together with electron backscatter diffraction (EBSD) techniques. The results show that the{1022}?1123? compression twinning mode is the dominant deformation twin at low strains loaded along the c-axis, and the{1012}?1011?tensile twinning generates as the second twin in {1022}?1123?twins. The selection of twinning modes is governed by Schmid factor (SF) due to the calculating of SF and the EBSD simulating of twinning distribution. The evolution of texture during rolling affected by twins with increase of the strain was explained.