基于同步辐射连续X射线谱的多重孪生形态与长大的原位分析（英文）

发布时间：2018-03-09 19:02

本文选题：同步辐射X射线　切入点：形变孪生　出处：《Transactions of Nonferrous Metals Society of China》2015年07期 　论文类型：期刊论文

【摘要】：同步辐射连续X射线谱微衍射技术被应用于原位研究AZ31(Mg-3Al-1Zn)薄板单向拉伸过程中的形变孪生,对孪晶在64~73 MPa载荷条件下的形态和生长进行原位分析。在先进光源中心(ALS)的12.3.2光束线采集的X射线衍射数据被用来表征面积为396μm×200μm的关注区域。该实验装置和具有深度分辨能力的X射线显微术可在亚微米尺度上确定晶粒内位置与取向联系。一系列基体晶粒按照晶体取向分类来研究孪生行为。结果展示了相同晶粒内多重孪生的孪生变体选择、局域取向差波动及镶嵌块扩展。随着载荷增加,沿孪晶迹线方向的取向差波动持续增加,其原因归结为几何必需位错的积累。
[Abstract]:Synchrotron radiation continuous X-ray microdiffraction technique has been used to study in situ deformation twinning of AZ31Mg-3Al-1Zn1 thin plate during uniaxial stretching. In situ analysis of the morphology and growth of the twin under 64N73 MPa loading was carried out. The X-ray diffraction data collected by the 12.3.2 beam line at the center of the advanced light source ALS were used to characterize the area of concern with an area of 396 渭 m 脳 200 渭 m. X-ray microscopy with depth resolution can determine the relationship between the position and orientation of grains at submicron scale. A series of matrix grains are classified according to crystal orientation to study twinning behavior. The results show that there are multiple twins in the same grains. Twin variant selection, With the increase of load, the fluctuation of orientation difference along the twinning trace continues to increase, which can be attributed to the accumulation of geometric necessary dislocations.
【作者单位】：湖南工学院先进制造技术研究所;Institute
【基金】：Project(DP140102355)supported by the Australian Research Council(ARC) Project supported by the China Scholarship Council(CSC)
【分类号】：TG146.22

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