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OALib Journal期刊
ISSN: 2333-9721
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用相变晶体学指导Mg-Sn-Mn合金优化设计
DOI: 10.3724/SP.J.1037.2010.00323, PP. 41-46
Keywords: 镁合金设计,相变晶体学,析出相形貌,位向关系
Abstract:
以相变晶体学为主要原则对Mg-Sn-X合金进行优化设计.在对现有镁合金系统充分调研的基础上,根据Mg基体与析出相的相变晶体学匹配关系,提出2条相变晶体学判据来判断可能沿Mg基体[0001]α方向择优生长的析出相.根据这2条相变晶体学判据结合相图分析推测在Mg-Sn-Mn系统中可能得到沿Mg基体[0001]α方向择优生长的β-Mn析出相.对Mg-7.5Sn-2.2Mn(质量分数,%)合金时效组织的TEM研究证实了上述判断.研究结果表明,β-Mn析出相呈棒状,长轴沿Mg基体[0001]α方向,它与Mg基体的位向关系(OR)是[0001]α///[211]β-Mn,[0110]α///[011]β-Mn,[2110]α//[111]β-Mn.
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