Effect of boron addition on the microstructure and mechanical properties of K4750 nickel-based superalloy
文献类型：期刊论文
| 作者 | Li, Xiaoxiao1,2; Ou, Meiqiong1; Wang, Min1; Zhang, Long1; Ma, Yingche1; Liu, Kui1 |
| 刊名 | JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
 |
| 出版日期 | 2021-01-10 |
| 卷号 | 60页码:177-185 |
| 关键词 | Nickel-based superalloy Boron addition Secondary ion mass spectrometry (SIMS) Grain boundary segregation Mechanical properties |
| ISSN号 | 1005-0302 |
| DOI | 10.1016/j.jmst.2020.02.079 |
| 通讯作者 | Ma, Yingche(ycma@imr.ac.cn) ; Liu, Kui(kliu@imr.ac.cn) |
| 英文摘要 | The effect of boron addition at 0, 0.007 wt. % and 0.010 wt. % on the microstructure and mechanical properties of K4750 nickel-based superalloy was studied. The microstructure of the as-cast and heat-treated alloys was analyzed by SEM, EPMA, SIMS and TEM. Lamellar M5B3-type borides were observed in boron-containing as-cast alloys. After the full heat treatment, boron atoms released from the decomposition of M5B3 borides were segregated at grain boundaries, which inhibited the growth and agglomeration of M23C6 carbides. Therefore, the M23C6 carbides along grain boundaries were granular in boron-containing alloys, while those were continuous in boron-free alloys. The mechanical property analysis indicated that the addition of boron significantly improved the tensile ductility at room temperature and stress rupture properties at 750 degrees C/430 MPa of K4750 alloy. The low tensile ductility at room temperature of OB alloy was attributed to continuous M23C6 carbides leaded to stress concentration, which provided a favorable location for crack nucleation and propagation. The improvement of the stress rupture properties of boron-containing alloys was the result of the combination of boron segregation increased the cohesion of grain boundaries and granular M23C6 carbides suppressed the link-up and extension of micro-cracks. (C) 2020 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000594138800020 |
| 出版者 | JOURNAL MATER SCI TECHNOL |
| 源URL | [http://ir.imr.ac.cn/handle/321006/158722]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Ma, Yingche; Liu, Kui |
| 作者单位 | 1.Chinese Acad Sci, Inst Met Res, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| 推荐引用方式 GB/T 7714 | Li, Xiaoxiao,Ou, Meiqiong,Wang, Min,et al. Effect of boron addition on the microstructure and mechanical properties of K4750 nickel-based superalloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2021,60:177-185. |
| APA | Li, Xiaoxiao,Ou, Meiqiong,Wang, Min,Zhang, Long,Ma, Yingche,&Liu, Kui.(2021).Effect of boron addition on the microstructure and mechanical properties of K4750 nickel-based superalloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,60,177-185. |
| MLA | Li, Xiaoxiao,et al."Effect of boron addition on the microstructure and mechanical properties of K4750 nickel-based superalloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 60(2021):177-185. |
入库方式： OAI收割
来源：金属研究所
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