渠成,李彦生,王金辉,徐瑞

• 1:燕山大学材料科学与工程学院亚稳材料制备技术与科学国家重点实验室
• 2:河北省金属产品工艺与性能综合优化实验室

摘要(Abstract)：

对铸态ZK60镁合金固溶处理后进行高压扭转(HPT)处理,随后进行时效处理,利用光学显微镜(OM)、扫描电镜(SEM)、X射线衍射分析(XRD)及显微硬度仪等对其微观结构和力学性能进行了研究。结果表明:高压扭转(HPT)大塑性变形使ZK60镁合金的晶粒尺寸细化到纳米级晶粒,合金基体中粗大的针状、短杆状和块状的析出相转变为细小弥散的颗粒状和椭球状。固溶态ZK60镁合金经HPT处理5圈后显微硬度达到最高约为124.05 HV0.1,HPT提高了其时效峰值硬度并大幅度缩短了峰值时效时间。

关键词(KeyWords)： ZK60镁合金;高压扭转;时效强化;析出相;显微硬度

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金项目(No.51675092)

作者(Author): 渠成,李彦生,王金辉,徐瑞

DOI: 10.13289/j.issn.1009-6264.2018-0519

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