發(fā)布時間：2018-03-09 19:02

  本文選題：同步輻射X射線　切入點：形變孿生　出處：《Transactions of Nonferrous Metals Society of China》2015年07期 　論文類型：期刊論文

【摘要】：同步輻射連續(xù)X射線譜微衍射技術(shù)被應(yīng)用于原位研究AZ31(Mg-3Al-1Zn)薄板單向拉伸過程中的形變孿生,對孿晶在64~73 MPa載荷條件下的形態(tài)和生長進行原位分析。在先進光源中心(ALS)的12.3.2光束線采集的X射線衍射數(shù)據(jù)被用來表征面積為396μm×200μm的關(guān)注區(qū)域。該實驗裝置和具有深度分辨能力的X射線顯微術(shù)可在亞微米尺度上確定晶粒內(nèi)位置與取向聯(lián)系。一系列基體晶粒按照晶體取向分類來研究孿生行為。結(jié)果展示了相同晶粒內(nèi)多重孿生的孿生變體選擇、局域取向差波動及鑲嵌塊擴展。隨著載荷增加,沿孿晶跡線方向的取向差波動持續(xù)增加,其原因歸結(jié)為幾何必需位錯的積累。
[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.
【作者單位】： 湖南工學(xué)院先進制造技術(shù)研究所;Institute
【基金】：Project(DP140102355)supported by the Australian Research Council(ARC) Project supported by the China Scholarship Council(CSC)
【分類號】：TG146.22

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本文編號：1589837