杨晓红,彭丽梅,杨晨辉,贾波,安建

• 1:吉林大学汽车材料教育部重点实验室
• 2:长春轨道客车股份有限公司技术中心

摘要(Abstract)：

用XRD衍射和透射高分辨HTEM方法分析Mg-4Y-3Nd合金在固溶处理525℃×8 h、时效温度250℃、时效时间16 h状态下的显微组织、析出相的点阵结构和基体点阵常数变化。结果表明:经过固溶时效的Mg-4Y-3Nd合金的显微组织由α-Mg固溶体、析出相Mg24Y5、Mg41Nd5和Mg14Nd2Y组成。析出相在晶内和晶界同时析出,晶内析出相形状为块状或短杆状,呈弥散分布,晶界上析出相呈三角形为链状分布,时效析出相Mg14Nd2Y与基体为半共格界面位相关系。随着析出相的生成,基体的点阵常数变大,同一晶面的衍射角(2θ)减小,晶面间距增大。

关键词(KeyWords)： Mg-4Y-3Nd合金;固溶时效;析出相;位相关系

Abstract:

Keywords:

基金项目(Foundation): 吉林省自然科学基金(201215026)

作者(Author): 杨晓红,彭丽梅,杨晨辉,贾波,安建

DOI: 10.13289/j.issn.1009-6264.2015.04.007

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