| Effect of Heat Treatment on the Microstructure and Mechanical Properties of Nb-base Superalloys | |
| Shi Lei; Yu Jinjiang; Cui Chuanyong; Sun Xiaofeng | |
| Corresponding Author | Yu Jinjiang(jjyu@imr.ac.cn) |
| 2017-08-01 | |
| Source Publication | RARE METAL MATERIALS AND ENGINEERING
 |
| ISSN | 1002-185X |
| Volume | 46Issue:8Pages:2260-2265 |
| Abstract | The effect of heat treatment on the microstructure and mechanical properties of Nbss/Nb5Si3 in situ composites prepared by conventional high-rate-solidification Bridgeman process (HRS) was investigated. The microstructure evolution of samples during heat treatment process were analyzed by SEM, XRD and EPMA. Results show that the as-cast alloy consists of Nbss, gamma-(Nb, Ti)(5)Si-3, beta-(Nb, Ti)(5)Si-3 and primary carbide phase; after heat treatment, the beta-(Nb,Ti)(5)Si-3 phase is transformed to alpha-(Nb,Ti)(5)Si-3 phase and the secondary carbide is precipitated. Meanwhile, the silicide phase gradually dissolves or breaks into small pieces, with the morphology changing from the needle into granules. The transformation (Nb,Ti)(5)Si-3 -> (Ti,Nb)(5)Si-3 occurs when aging at 1150 degrees C. The compressive strength and room temperature tensile strength of heat-treatment specimens are improved, while the tensile strength of as-cast and heat-treated samples at 1000 degrees C is at the same level. The temperature has a great influence on the fracture mode, which is cleavage fracture at low temperature and ductile fracture at high temperature. |
| Keyword | Nb-base superalloy microstructure heat treatment 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:000409396900039 |
| Publisher | NORTHWEST INST NONFERROUS METAL RESEARCH |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/124973 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Yu Jinjiang |
| Affiliation | Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China |
| Recommended Citation GB/T 7714 | Shi Lei,Yu Jinjiang,Cui Chuanyong,et al. Effect of Heat Treatment on the Microstructure and Mechanical Properties of Nb-base Superalloys[J]. RARE METAL MATERIALS AND ENGINEERING,2017,46(8):2260-2265. |
| APA | Shi Lei,Yu Jinjiang,Cui Chuanyong,&Sun Xiaofeng.(2017).Effect of Heat Treatment on the Microstructure and Mechanical Properties of Nb-base Superalloys.RARE METAL MATERIALS AND ENGINEERING,46(8),2260-2265. |
| MLA | Shi Lei,et al."Effect of Heat Treatment on the Microstructure and Mechanical Properties of Nb-base Superalloys".RARE METAL MATERIALS AND ENGINEERING 46.8(2017):2260-2265. |
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