Grain rotations in ultrafine-grained aluminum films studied using in situ TEM straining with automated crystal orientation mapping

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• 作者：Ehsan Izadi^a ; Amith Darbal^b ; Rohit Sarkar^c ; Jagannathan Rajagopalan^a ; ^c ; ^{jrajago1@asu.edu}
• 关键词：In situ TEM ; Automated crystal orientation map ; Reversible grain rotation ; Bauschinger effect ; Grain boundary migration ; Detwinning
• 刊名：Materials & Design
• 出版年：2017
• 出版时间：5 January 2017
• 年：2017
• 卷：113
• 期：Complete
• 页码：186-194
• 全文大小：2040 K
• 卷排序：113

文摘

Large grain rotations occur during loading and are partially or fully reversible in a significant fraction of grains during unloading. Despite a sharp reduction in stress during unloading, the direction of rotation remains unchanged for a small fraction of grains. Reversible grain and twin boundary migrations, possibly caused by local stress reversal, are observed during both loading and unloading.