Effect of Phosphorous Content on the Microstructure and Stress Rupture Properties of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel

doi:10.3390/cryst13040703

IMR OpenIR

	Effect of Phosphorous Content on the Microstructure and Stress Rupture Properties of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel
	Qiao, Yufei 1,2,3; Liang, Tian 1,3; Chen, Sihan 1,2,3; Ren, Yuanyuan 4; Liu, Chunming 5; Qi, Yue 6; Ma, Yingche 1,3; Liu, Kui 1,3
通讯作者	Liang, Tian(tliang@imr.ac.cn) ; Ma, Yingche(ycma@imr.ac.cn)
	2023-04-01
发表期刊	CRYSTALS
卷号	13 期号:4 页码:16
摘要	The microstructure of solution-annealed and aged tensile properties and the stress rupture properties of 15Cr-15Ni titanium-modified austenitic stainless steel with different phosphorus contents were investigated using OM, SEM and TEM. The results showed that two phosphide morphologies were observed after long-term isothermal aging at 850 degrees C for 1000 h. One was the needle-like M2P distributed within the grain. The other was the blocky M3P distributed at the grain boundaries and twins. The tensile properties of the alloy were unaffected by the phosphorus content, but the stress rupture properties were significantly impacted. With the increase in the phosphorus content from 70 ppm to 250 ppm, the stress rupture life increased from 148 to 269.7 h. Since the strengthening effect of phosphides within the grain or at the grain boundary has been shown to improve the stress rupture properties of alloys, many nanosized granular precipitates, such as the sigma phase, carbides and phosphides, have been observed at the grain boundary, capable of alleviating the stress concentration and limit the crack propagation between two phases, improving the strength of the grain boundary. Intragranular needle-like phosphides can hinder dislocation movements effectively, which improves the intragranular strength of alloys.
关键词	phosphorus precipitation behavior phosphides stress rupture life austenitic stainless steel
DOI	10.3390/cryst13040703
收录类别	SCI
语种	英语
WOS研究方向	Crystallography ; Materials Science
WOS类目	Crystallography ; Materials Science, Multidisciplinary
WOS记录号	WOS:000977483100001
出版者	MDPI
引用统计
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/177534
专题	中国科学院金属研究所
通讯作者	Liang, Tian; Ma, Yingche
作者单位	1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China 3.Chinese Acad Sci, Inst Met Res, Shi Changxu Innovat Ctr Adv Mat, Shenyang 110016, Peoples R China 4.China Inst Atom Energy, Beijing 102413, Peoples R China 5.Northeastern Univ, Sch Mat Sci & Engn, Shenyang 110819, Peoples R China 6.Fushun Special Steel Shares Co Ltd, Fushun 113006, Peoples R China
推荐引用方式 GB/T 7714	Qiao, Yufei,Liang, Tian,Chen, Sihan,et al. Effect of Phosphorous Content on the Microstructure and Stress Rupture Properties of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel[J]. CRYSTALS,2023,13(4):16.
APA	Qiao, Yufei.,Liang, Tian.,Chen, Sihan.,Ren, Yuanyuan.,Liu, Chunming.,...&Liu, Kui.(2023).Effect of Phosphorous Content on the Microstructure and Stress Rupture Properties of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel.CRYSTALS,13(4),16.
MLA	Qiao, Yufei,et al."Effect of Phosphorous Content on the Microstructure and Stress Rupture Properties of 15Cr-15Ni Titanium-Modified Austenitic Stainless Steel".CRYSTALS 13.4(2023):16.