论文摘要
In order to investigate the microstructure and mechanical property evolution of low-carbon reduced activation ferritic/martensitic（RAFM） steel during isothermal aging, the normalized and tempered specimens were aged at 600 °C for 500,1000, and 3000 h, respectively. The microstructural evolution with aging time was analyzed, including the precipitation and growth of M23C6 and MX-type carbides as well as the formation of Laves phase. The results indicate that the coarsening of M23C6 is more obvious than that of MX with increase in aging time. During the long-term thermal exposure, the Fe2 W Laves phase precipitates adjacent to M23C6 along the prior austenite grain boundaries and packet boundaries. Lower carbon content can delay the precipitation of Laves phase compared to the steel containing higher carbon. In addition, the Laves phase precipitated along boundaries can provide the precipitation strengthening, slightly increasing the tensile strength of low-carbon RAFM steel after aging for 3000 h.
论文目录
文章来源
类型: 期刊论文
作者: Jian-Guo Chen,Chen-Xi Liu,Chen Wei,Yong-Chang Liu,Hui-Jun Li
来源: Acta Metallurgica Sinica(English Letters) 2019年09期
年度: 2019
分类: 工程科技Ⅰ辑
专业: 金属学及金属工艺
单位: State Key Lab of Hydraulic Engineering Simulation and Safety, School of Materials Science and Engineering, Tianjin University,Tianjin Special Equipment Inspection Institute
基金: financially supported by the National Natural Science Foundation of China (Nos. U1660201,51474156 and 51501126),the National Magnetic Confinement Fusion Energy Research Project (No. 2015GB119001)
分类号: TG156.92;TG142.1
页码: 1151-1160
总页数: 10
文件大小: 6705K
下载量: 9