熊毅,郭志强,何红玉,卢艳君,张凌峰

• 1:河南科技大学材料科学与工程学院
• 2:河南省有色金属材料科学与加工技术重点实验室
• 3:广州民航职业技术学院飞机维修工程学院

摘要(Abstract)：

采用多道次ECAP温变形实现了高碳珠光体钢组织的超细化,利用透射电镜(TEM)和原子力显微镜(AFM)观察了变形前后珠光体的演变情况,并用纳米压痕技术表征了铁素体相的纳米力学性能。结果表明:经历大应变温变形之后,制备出了晶粒尺度均在亚微米量级的超微细复相组织(铁素体+粒状渗碳体),珠光体的组织形态发生由二维层片状向三维等轴状的转变;等轴状亚微米级铁素体相的纳米压痕硬度和Young’s模量分别为4.4 GPa和200 GPa,都略高于原始珠光体组织,当压痕深度超过100 nm之后,纳米压痕硬度呈现出明显的基底效应,而Young’s模量则趋于一致,对基底效应不敏感。

关键词(KeyWords)： ECAP;珠光体;超微细复相组织;纳米压痕硬度;Young’s模量

Abstract:

Keywords:

基金项目(Foundation): 国家自然科学基金资助项目(50801021);; 河南省高等学校青年骨干教师资助项目(2011GGJS-070)

作者(Author): 熊毅,郭志强,何红玉,卢艳君,张凌峰

DOI: 10.13289/j.issn.1009-6264.2013.07.007

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