陈庆军,张少伟,高霁雯

• 1:南昌航空大学材料科学与工程学院
• 2:南昌航空大学土木建筑学院

摘要(Abstract)：

采用水冷铜模吸铸法制备直径为4 mm的Fe_(41)Co_7Cr_(15)Mo_(14)Y_2C_(15)B_6块体非晶合金,利用X射线衍射(XRD)和差式扫描量热分析仪(DSC)分别对该非晶的结构及热力学参数进行表征。利用Gleeble 3500热模拟机在过冷液相区温度620℃下,以1×10~(-2)s~(-1)的应变速率对该非晶合金进行压缩变形,研究变形量(20%、40%和75%)对该非晶合金结构和热稳定性的影响。结果表明,该条件下非晶试样能发生较好的塑性变形并未发现明显的晶化,且随着塑性变形的增加,非晶合金的热稳定性更加优异,当形变量为75%时,非晶合金的玻璃转变温度和过冷液相区宽度分别从铸态的585℃和40℃增大至658℃和59℃。变形影响非晶试样的显微硬度,宏观表现为应变量越大其显微硬度越高,当塑性形变量为20%、40%及75%时,对应最高维氏硬度分别为1258,1270和1288 HV。

关键词(KeyWords)： 铁基非晶合金;塑性变形;热稳定性;自由体积

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金(51261021);; 江西省科技落地计划项目(KJLD13056)

作者(Author): 陈庆军,张少伟,高霁雯

DOI: 10.13289/j.issn.1009-6264.2016.07.002

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