郭周强,葛利玲,袁航,秦超

• 1:西安理工大学材料科学与工程学院

摘要(Abstract)：

利用超音速微粒轰击技术(supersonic fine particles bombarding,SFPB)对钛合金TC4进行了表面纳米化处理,并对SFPB处理后的试样进行不同温度2 h退火处理。借助X射线衍射、显微硬度计、透射电子显微镜和差热分析对纳米化及热处理后的试样进行了组织和性能表征,研究钛合金表面纳米化机理及其热稳定性。结果表明:经过SFPB处理后的试样在表层形成了纳米结构层,随着处理时间的延长,变形层厚度不断增加,晶粒尺寸逐步细化,当SFPB处理30 min后晶粒尺寸趋于稳定,在表层形成了晶粒尺寸约为15 nm具有随机取向的纳米等轴晶。纳米化后的试样在750℃退火时,纳米晶未发生明显粗化,因而具有很好的热稳定性。

关键词(KeyWords)： 钛合金TC4;表面纳米化;热稳定性

Abstract:

Keywords:

基金项目(Foundation): 全国大学生创新性实验计划项目(091070025);; 陕西省科技计划项目(2009K06-22)

作者(Author): 郭周强,葛利玲,袁航,秦超

DOI: 10.13289/j.issn.1009-6264.2012.03.004

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