Evaluation of strain fields caused by the η′ phase in an Al-Zn-Mg-Cu alloy

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• 作者：Xiaohu Hou^a ; Pucun Bai^b ; ^{pcbai@imut.edu.cn}
• 关键词：Strain field ; High-resolution transmission electron microscopy ; η&prime ; phase ; Al-Zn-Mg-Cu alloy
• 刊名：Materials Science and Engineering: A
• 出版年：2017
• 出版时间：23 January 2017
• 年：2017
• 卷：683
• 期：Complete
• 页码：90-93
• 全文大小：1064 K
• 卷排序：683

文摘

Strain fields around the η′ phase precipitated in an Al-12Zn-2.4Mg-1.1Cu alloy were quantitatively measured employing high-resolution transmission electron microscopy (HRTEM) and geometric phase analysis (GPA) technique. Afterwards, experimental strain maps were compared with the simulated strain maps obtained from a simulated HRTEM image which was created using the CrystalMaker and JEMS software. Compressive strain is found around the η′ phase, and the maximum compressive strain is about 2.8%. The simulated results are consistent with the experimental results to describe the distributions of strain fields around the η′ phase along the x direction which is parallel to [1¯1¯1 ]Al direction.