徐春杰;郭学锋;刘礼;张忠明;

• 1:西安理工大学材料科学与工程学院
• 2:西安理工大学材料科学与工程学院
• 3:西安理工大学材料科学与工程学院
• 4:西安理工大学材料科学与工程学院 陕西西安710048

摘要(Abstract)：

采用往复挤压工艺将快速凝固Mg92.5Zn6.4Y1.1合金薄带在330℃挤压2道次和4道次,然后正挤压制成Φ10 mm的棒材。用OM,TEM,XRD及DTA研究了往复挤压过程中准晶相I-Mg3YZn6弥散析出及对力学性能的影响。研究表明,往复挤压有利于快速凝固Mg92.5Zn6.4Y1.1合金薄带的焊合,获得组织致密、均匀、高强韧合金。往复挤压2道次,相组成为-αMg和准晶I-Mg3YZn6,脱溶析出纳米准晶相较少;4道次相组成为-αMg和准晶I-Mg3YZn6及MgZn相,脱溶弥散析出的纳米I-Mg3YZn6准晶相及MgZn相较多。往复挤压提高材料的拉伸性能,其主要原因是细晶强化和析出强化。

关键词(KeyWords)： 往复挤压;准晶;快速凝固;镁合金;组织与性能;稀土

Abstract:

Keywords:

基金项目(Foundation): 陕西省自然科学研究计划项目(2002E110,2003E111);; 教育部回国留学人员启动基金;; 西安市科技攻关计划-工业攻关项目(GG06062);; 西安理工大学科学研究计划(X类)项目(101-210602)资助

作者(Author): 徐春杰;郭学锋;刘礼;张忠明;

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DOI:

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