Effects of Phosphorus and Iron on Microstructures and Mechanical Properties in NiCrFe-Based Alloys

论文摘要

The microstructures and mechanical properties, especially creep properties, of the NiCrFe-based alloys with various contents of phosphorus and iron were investigated. The results showed that the tensile yield strength decreased with increasing iron contents while had no obvious change with the addition of phosphorus. For creep properties, the alloy with15.8 wt% iron and 0.09 wt% phosphorus possessed the longest creep life（679 h） among all alloys. Only M23C6 was formed in the alloys with low phosphorus contents, while both intergranular M3P and M23C6 precipitated with the increment of phosphorus, which enhanced the strength of grain boundary by hindering the movements of dislocations during creep tests. The reasons for the enhancement of creep life were mainly related to the solid solution strengthening effect of phosphorus and optimization of grain boundary precipitations by phosphorus.

论文目录

文章来源

类型: 期刊论文

作者: Xin-Tong Lian,Wen-Ru Sun,Fang Liu,Dan-Dan Zheng,Xin Xin

来源: Acta Metallurgica Sinica(English Letters) 2019年05期

年度: 2019

分类: 工程科技Ⅰ辑

专业: 金属学及金属工艺

单位: Institute of Metal Research, Chinese Academy of Sciences,School of Materials Science and Engineering, University of Science and Technology of China

分类号: TG146.15

页码: 659-667

总页数: 9

文件大小: 4384K

下载量: 33

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