Effects of Phosphorus on tensile and stress rupture properties of GH4169 alloy
The influence of P on tensile properties at room temperature and 650℃ as well as the effects of P on rupture properties at 650℃/690 MPa of GH4169 alloy with standard heat treatment (STD) and direct aging heat treatment (DA) were investigated in this paper.Mechanism of the influence of P was also undertaken with microstructure and fractograph analysis.The results show that P content has little effect on tensile properties of alloys.While the stress rupture life improves significantly with an increase of P content due to grain boundary segregation of P increasing grain boundary bonding force.And P has less influence on stress rupture life of GH4169 alloy as STD than that as DA,which may be relevant to the enrichment of P on δ phase interface.Increasing P content from 0.006% to 0.019%,the stress rupture failure mode shows mainly transgranular fracture,decreased fraction of fine microvoids and deep dimple structure arises gradually.
GH4169 alloys Phosphorus tensile stress rupture fractograph
Cheng Tang Jinhui Du Qun Deng Zhongnan Bi Minqing Wang
High Temperature Materials Research institute,Central iron and Steel Research Institute,Beijing,China,100081
国际会议
沈阳
英文
1439-1445
2012-09-26（万方平台首次上网日期，不代表论文的发表时间）