Influence of Fe on Microstructure and Mechanical Properties in P-doped Ni-Cr-Fe Alloys

doi:10.1007/s40195-018-0815-4

IMR OpenIR

	Influence of Fe on Microstructure and Mechanical Properties in P-doped Ni-Cr-Fe Alloys
	Lian, Xin-Tong 1,2; Sun, Wen-Ru 1; Xin, Xin 1; Liu, Fang 1; Zheng, Dan-Dan 1
通讯作者	Sun, Wen-Ru(wrsun@imr.ac.cn)
	2019-06-01
发表期刊	ACTA METALLURGICA SINICA-ENGLISH LETTERS
ISSN	1006-7191
卷号	32 期号:6 页码:771-779
摘要	The influence of Fe on the microstructure and mechanical properties of P-doped Ni-Cr-Fe alloys has been investigated. Results showed that increasing Fe content refined the dendrite microstructure and enhanced the solubility of P in as-cast alloys. The change of microhardness in different dendrite regions was attributed to the segregation of P atoms in solid solution state, which had strengthening effects. Increasing Fe contents from 15.2 to 60.7 wt% reduced the yield strength and tensile strength but had little influence on the elongation of alloys. The stress rupture life of alloys after heat treatment decreased with the increment of Fe contents, and the failure fracture modes transferred from transgranular to intergranular fracture mode. The change of fracture modes was due to the weakness of grain boundaries caused by the increment of Fe. In addition, the precipitation of M23C6 was believed to be related to the segregation of P toward grain boundaries, which led to the fluctuation of carbon and chromium atoms near the grain boundaries in alloys with low Fe contents. Consequently, the increment of Fe decreased the strength of matrix and changed the existence of P atoms and the precipitates at grain boundaries.
关键词	Fe P Segregation Precipitate Mechanical properties
DOI	10.1007/s40195-018-0815-4
收录类别	SCI
语种	英语
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000466844400012
出版者	CHINESE ACAD SCIENCES, INST METAL RESEARCH
引用统计	被引频次：1[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/321006/133120
专题	中国科学院金属研究所
通讯作者	Sun, Wen-Ru
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China 2.Shanghai Univ, Sch Mat Sci & Engn, Shanghai 200444, Peoples R China
推荐引用方式 GB/T 7714	Lian, Xin-Tong,Sun, Wen-Ru,Xin, Xin,et al. Influence of Fe on Microstructure and Mechanical Properties in P-doped Ni-Cr-Fe Alloys[J]. ACTA METALLURGICA SINICA-ENGLISH LETTERS,2019,32(6):771-779.
APA	Lian, Xin-Tong,Sun, Wen-Ru,Xin, Xin,Liu, Fang,&Zheng, Dan-Dan.(2019).Influence of Fe on Microstructure and Mechanical Properties in P-doped Ni-Cr-Fe Alloys.ACTA METALLURGICA SINICA-ENGLISH LETTERS,32(6),771-779.
MLA	Lian, Xin-Tong,et al."Influence of Fe on Microstructure and Mechanical Properties in P-doped Ni-Cr-Fe Alloys".ACTA METALLURGICA SINICA-ENGLISH LETTERS 32.6(2019):771-779.