| Effects of Ti-Nb Microalloying on the Microstructure and Mechanical Properties of Ultra-pure 30% Cr Super Ferritic Stainless Steel | |
| Zhu Yangyang1,2; Ning Likui2; Duan Chaohui1,2; Liu Enze2; Tong Jian2; Tan Zheng2; Li Haiying2; Zhao Lei3; Wang Zengrui4; Zheng Zhi2 | |
| Corresponding Author | Ning Likui(lkning@imr.ac.cn) |
| 2022-05-01 | |
| Source Publication | RARE METAL MATERIALS AND ENGINEERING
 |
| ISSN | 1002-185X |
| Volume | 51Issue:5Pages:1845-1856 |
| Abstract | 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. |
| Keyword | super ferritic stainless steel Ti-Nb microalloying microstructure inclusion mechanical properties |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000813756100041 |
| Publisher | NORTHWEST INST NONFERROUS METAL RESEARCH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/174805 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Ning Likui |
| Affiliation | 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 |
| Recommended Citation 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. |
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