(Cu50Zr50)92Al8块体非晶合金高温塑性变形过程中的晶化行为

稀有金属材料与工程, 2012, 41(4): 658-662.

(Cu50Zr50)92Al8块体非晶合金高温塑性变形过程中的晶化行为

田延豹 ^1, , 马蓦 ^2, , 罗致春 ^3, , 万小军 ^4, , 林建国 ^5,

1.湘潭大学低维材料与应用教育部重点实验室,湖南湘潭411105

2.湘潭大学低维材料与应用教育部重点实验室,湖南湘潭411105

3.湘潭大学低维材料与应用教育部重点实验室,湖南湘潭411105

4.湘潭大学低维材料与应用教育部重点实验室,湖南湘潭411105

5.湘潭大学低维材料与应用教育部重点实验室,湖南湘潭411105

基金项目: 湘潭大学科研项目(08XZX10) 湖南省自然科学基金(09JJ0386) 国家自然科学基金(10972190)

关键词：块体非晶合金 , 塑性变形 , 晶化 , 热稳定性 , 显微硬度

Crystallization Behavior of (Cu50Zr50)92Al8 Bulk Metallic Glass During the High Temperature Plastic Deformation

采用水冷铜模吸铸法制备直径2 mm的(Cu50Zr50)92Al8块体非晶合金.利用X射线衍射(XRD)、差示扫描量热分析仪(DSC)对该非晶合金的结构及热力学参数进行表征.利用万能试验机在过冷液相区内对该非晶合金进行压缩变形,研究变形量(20％,60％和80％)对非晶合金显微结构和热稳定性的影响.结果表明,塑性变形使得该非晶合金的热稳定性降低,并导致其部分晶化,其晶化程度取决于合金的变形量的大小,当变形量为80％时,该合金的XRD图谱中出现了明显的晶化峰.晶化相的析出使得变形后的非晶合金的显微硬度有明显提高.

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