| Effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys | |
| Yin, Bin1,2; Xie, Guang1; Lou, Langhong1; Zhang, Jian1 | |
| Corresponding Author | Xie, Guang(gxie@imr.ac.cn) |
| 2020-07-15 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 829Pages:14 |
| Abstract | The effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys at 1000 degrees C and 1100 degrees C has been investigated. Interdiffusion occurs between the NiCrAlYSi coating and the substrate, leading to the formation of inter-diffusion zone (IDZ) and secondary reaction zone (SRZ). After exposure at 1000 degrees C for 100 h, the initial gamma/gamma' transforms to gamma' phases in the IDZ, and SRZ with sigma and mu topologically close-packed (TCP) phases is formed primarily due to the inward diffusion of Al. Different behavior of SRZ formation in the alloys with various Ta content can be observed after exposure at 1000 degrees C, which highlights the potency of Ta addition in promoting SRZ formation. This may be ascribed to the fact that Ta promotes the precipitation of TCP phases. After exposure at 1100 degrees C for 100 h, the initial gamma/gamma' transforms to y layer and coarse gamma' phases in the IDZ, and no SRZ can be found. The formation of IDZ is significantly suppressed by Ta addition, which may be related to the retardation of interdiffusion between the coating and the substrate due to the increased gamma' volume fraction. Furthermore, gamma' rafting parallel to and/or perpendicular to the coating/substrate interface in the substrate beneath IDZ are found in the alloys after exposure at 1000 degrees C and 1100 degrees C. Microstructural observation shows that Ta has a potent influence on the development of perpendicular gamma' rafting. The mechanism of parallel gamma' rafting and perpendicular gamma' rafting has been discussed, respectively. (C) 2020 Elsevier B.V. All rights reserved. |
| Keyword | Single crystal superalloys NiCrAlYSi coating Ta Secondary reaction zone (SRZ) Rafting |
| Funding Organization | National Natural Science Foundation of China |
| DOI | 10.1016/j.jallcom.2020.154440 |
| Indexed By | SCI |
| Language | 英语 |
| Funding Project | National Natural Science Foundation of China[51771204] ; National Natural Science Foundation of China[U1732131] ; National Natural Science Foundation of China[51631008] ; National Natural Science Foundation of China[91860201] ; National Natural Science Foundation of China[51911530154] |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000523555300039 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/137995 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Xie, Guang |
| Affiliation | 1.Chinese Acad Sci, Inst Met Res, Superalloys Div, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Hefei 230026, Peoples R China |
| Recommended Citation GB/T 7714 | Yin, Bin,Xie, Guang,Lou, Langhong,et al. Effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2020,829:14. |
| APA | Yin, Bin,Xie, Guang,Lou, Langhong,&Zhang, Jian.(2020).Effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys.JOURNAL OF ALLOYS AND COMPOUNDS,829,14. |
| MLA | Yin, Bin,et al."Effect of Ta on microstructural evolution of NiCrAlYSi coated Ni-base single crystal superalloys".JOURNAL OF ALLOYS AND COMPOUNDS 829(2020):14. |
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