Effects of Ti-Nb Microalloying on the Microstructure and Mechanical Properties of Ultra-pure 30% Cr Super Ferritic Stainless Steel

IMR OpenIR

	Effects of Ti-Nb Microalloying on the Microstructure and Mechanical Properties of Ultra-pure 30% Cr Super Ferritic Stainless Steel
	Zhu Yangyang 1,2; Ning Likui 2; Duan Chaohui 1,2; Liu Enze 2; Tong Jian 2; Tan Zheng 2; Li Haiying 2; Zhao Lei 3; Wang Zengrui 4; Zheng Zhi 2
通讯作者	Ning Likui(lkning@imr.ac.cn)
	2022-05-01
发表期刊	RARE METAL MATERIALS AND ENGINEERING
ISSN	1002-185X
卷号	51 期号:5 页码:1845-1856
摘要	The effects of Ti-Nb microalloying on the microstructure and mechanical properties of ultra-pure 30% Cr super ferritic stainless steel were studied by optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). The results show that the inclusions in the matrix of ultra-pure material are mainly composed of Cr-rich oxides with size of 2 similar to 6 mu m. With Ti-Nb addition, Cr-rich oxides are transformed into Ti-O-N-rich composite oxides with size of 1 similar to 4 mu m. Meanwhile, the nano-scale (Ti, Nb)(C, N) precipitations are formed in the matrix. The strong growth inclination of ferrite grain is the unique feature for the ultra-pure material during microstructure evolution. Ti-Nb microalloying can apparently refine the microstructure by weakening the grain growth inclination and promote the room temperature strength and hardness. Moreover, the susceptibility of room temperature elongation of material to grain size is enhanced by Ti-Nb microalloying. In addition, Ti-Nb microalloying has the double effect on the impact toughness for the ultra-pure material. On the one hand, the toughness can be improved by refining the grains; on the other hand, brittle inclusions formed in matrix deteriorate the toughness of ultra-pure material, especially at low temperature.
关键词	super ferritic stainless steel Ti-Nb microalloying microstructure inclusion mechanical properties
收录类别	SCI
语种	英语
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000813756100041
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
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/321006/174805
专题	中国科学院金属研究所
通讯作者	Ning Likui
作者单位	1.Univ Sci & Technol China, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 3.Liaoning Petrochem Univ, Fushun 113001, Peoples R China 4.Shenyang Res Inst Foundry Co Ltd, Shenyang 110021, Peoples R China
推荐引用方式 GB/T 7714	Zhu Yangyang,Ning Likui,Duan Chaohui,et al. Effects of Ti-Nb Microalloying on the Microstructure and Mechanical Properties of Ultra-pure 30% Cr Super Ferritic Stainless Steel[J]. RARE METAL MATERIALS AND ENGINEERING,2022,51(5):1845-1856.
APA	Zhu Yangyang.,Ning Likui.,Duan Chaohui.,Liu Enze.,Tong Jian.,...&Zheng Zhi.(2022).Effects of Ti-Nb Microalloying on the Microstructure and Mechanical Properties of Ultra-pure 30% Cr Super Ferritic Stainless Steel.RARE METAL MATERIALS AND ENGINEERING,51(5),1845-1856.
MLA	Zhu Yangyang,et al."Effects of Ti-Nb Microalloying on the Microstructure and Mechanical Properties of Ultra-pure 30% Cr Super Ferritic Stainless Steel".RARE METAL MATERIALS AND ENGINEERING 51.5(2022):1845-1856.