丁万武,祝江涛,赵文军,夏天东

• 1:兰州理工大学材料科学与工程学院

摘要(Abstract)：

采用X射线衍射(XRD)、扫描电镜(SEM)、光学显微镜(OM)等实验手段研究重熔过程中Al-5Ti-B合金的微观组织演变及其对纯铝的晶粒细化作用。结果表明:在730℃时,随着重熔体保温时间的增加,原来弥散分布的Ti B2发生偏聚,并被α-Al推向晶界处。在1000℃时,随着保温时间的增加,不仅Ti B2发生偏聚,而且Ti Al3的大小和形态均发生显著变化,Ti Al3的形貌由块状转变为粗大的长条状和针片状。重熔后的Al-5Ti-B合金仍具有较好的晶粒细化作用。

关键词(KeyWords)： Al-Ti-B合金;重熔;微观组织;细化性能

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(50965012);; 甘肃省青年科技基金(1308RJYA088);; 甘肃省自然科学基金(1308RJZA291,145RJYA295)

作者(Author): 丁万武,祝江涛,赵文军,夏天东

DOI: 10.13289/j.issn.1009-6264.2014.s2.009

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