The existence and strengthening mechanism of phosphorus in Ni17Cr15Fe-based alloys

doi:10.1016/j.msea.2020.140044

IMR OpenIR

	The existence and strengthening mechanism of phosphorus in Ni17Cr15Fe-based alloys
	Xue, Chaochao 1,2; Liu, Fang 1; Yao, Xiaoyu 1,2; Liu, Dongyan 1; Xin, Xin 1; Sun, Wenru 1; Zhang, Anwen 1; Zhang, Sha 1
通讯作者	Liu, Fang(fangliu@imr.ac.cn) ; Sun, Wenru(wrsun@imr.ac.cn)
	2020-10-21
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	797 页码:10
摘要	In this paper, the existing form of phosphorus (P) and its strengthening mechanism in the simplified alloys Ni-17%Cr-15%Fe were investigated. Two different post heat treatments were applied on the as solutionized alloys in order to investigate the precipitates and their effects on the mechanical properties. For the water quenched alloys, no precipitated compounds were observed either at grain boundary or within grain, the rupture strength was enhanced, and the tensile fracture mode transformed from mixture of intergranular and transgranular fracture to single transgranular fracture, which indicated the segregation of P atoms along grain boundary strengthened grain boundary. For the water quenched alloys with additional further aging at 800 degrees C for 8 h and subsequent water quenching, P facilitated the precipitation of intragranular M23C6 carbide and thus the intragranular strength was effectively improved. The results of quantitative chemical element analysis and qualitative TEM/EDS analysis indicated that P enriched in intragranular M23C6 carbide. At the same time, the amount of intergranular M23C6 carbide increased with an increase in P content and its morphology transformed from short rod to granular particle gradually, resulting in the grain boundary precipitation strengthening. The findings of existing state and strengthening mechanism of phosphorus in Ni-17%Cr-15%Fe alloys are of critical importance, which will provide useful information for further interpreting the beneficial effect of P in Ni-based superalloys.
关键词	Phosphorus Ni-17%Cr-15%Fe alloys M23C6 carbide Tensile properties Strengthening mechanism
DOI	10.1016/j.msea.2020.140044
收录类别	SCI
语种	英语
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000579487100011
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：3[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/141053
专题	中国科学院金属研究所
通讯作者	Liu, Fang; Sun, Wenru
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China
推荐引用方式 GB/T 7714	Xue, Chaochao,Liu, Fang,Yao, Xiaoyu,et al. The existence and strengthening mechanism of phosphorus in Ni17Cr15Fe-based alloys[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,797:10.
APA	Xue, Chaochao.,Liu, Fang.,Yao, Xiaoyu.,Liu, Dongyan.,Xin, Xin.,...&Zhang, Sha.(2020).The existence and strengthening mechanism of phosphorus in Ni17Cr15Fe-based alloys.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,797,10.
MLA	Xue, Chaochao,et al."The existence and strengthening mechanism of phosphorus in Ni17Cr15Fe-based alloys".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 797(2020):10.