| Effect of Solution Annealing on Microstructure and Mechanical Properties of a Ni-Cr-W-Fe Alloy | |
| Ou, Meiqiong; Ma, Yingche; Hao, Xianchao; Wan, Baifang; Liang, Tian; Liu, Kui; Ma, YC (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.; Ma, YC (reprint author), Jiangsu Toland Alloy Co Ltd, Danyang 212352, Peoples R China. | |
| 2017-11-01 | |
| Source Publication | JOURNAL MATER SCI TECHNOL
 |
| ISSN | 1005-0302 |
| Volume | 33Issue:11Pages:1300-1307 |
| Abstract | The effect of solution annealing on the microstructure and mechanical properties of a Ni-Cr-W-Fe alloy developed for advanced 700 degrees ultra-supercritical power plants was investigated. Test samples in this study were subjected to different solution treatments and the same aging treatment (at760 degrees C for 1 h). When solution annealing temperature was elevated from 1020 degrees C to 1150 degrees C, the stress-rupture life at 750 degrees C/320MPa was increased from 60 h to 300 h, the stress-rupture elongation was enhanced from 12% to 17%, and the elongation of the tensile at 750 degrees C was improved from 11% to 24%. All tensile and stress-rupture samples displayed an intergranular dimple mixed fracture. Intergranular micro-cracks had a great relationship with the morphology of grain boundary carbides. Most carbides retained the morphology of globular shape and continuous thin plate. After tensile and stress-rupture tests, a few carbides were converted into lamellar. The results showed that intergranular micro-cracks were easier to form at continuous thin plate carbides than at globular shape carbides. Lamellar carbides hardly caused the nucleation of micro-cracks. Besides, grain boundaries sliding and elements diffusion during stressrupture tests led to the formation of precipitate free zones, which accelerated the extension of microcracks and influenced the stress- rupture life. (C) 2016 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.; The effect of solution annealing on the microstructure and mechanical properties of a Ni-Cr-W-Fe alloy developed for advanced 700 degrees ultra-supercritical power plants was investigated. Test samples in this study were subjected to different solution treatments and the same aging treatment (at760 degrees C for 1 h). When solution annealing temperature was elevated from 1020 degrees C to 1150 degrees C, the stress-rupture life at 750 degrees C/320MPa was increased from 60 h to 300 h, the stress-rupture elongation was enhanced from 12% to 17%, and the elongation of the tensile at 750 degrees C was improved from 11% to 24%. All tensile and stress-rupture samples displayed an intergranular dimple mixed fracture. Intergranular micro-cracks had a great relationship with the morphology of grain boundary carbides. Most carbides retained the morphology of globular shape and continuous thin plate. After tensile and stress-rupture tests, a few carbides were converted into lamellar. The results showed that intergranular micro-cracks were easier to form at continuous thin plate carbides than at globular shape carbides. Lamellar carbides hardly caused the nucleation of micro-cracks. Besides, grain boundaries sliding and elements diffusion during stressrupture tests led to the formation of precipitate free zones, which accelerated the extension of microcracks and influenced the stress- rupture life. (C) 2016 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology. |
| description.department | [ou, meiqiong ; ma, yingche ; hao, xianchao ; liang, tian ; liu, kui] chinese acad sci, inst met res, shenyang 110016, liaoning, peoples r china ; [ou, meiqiong] univ sci & technol china, sch mat sci & engn, hefei 230026, anhui, peoples r china ; [ma, yingche ; wan, baifang] jiangsu toland alloy co ltd, danyang 212352, peoples r china |
| Keyword | Ni-cr-w-fe Alloy Solution Annealing Grain Boundaries Carbides Precipitate Free Zones Mechanical Properties |
| Subject Area | Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| Indexed By | SCI |
| Language | 英语 |
| WOS ID | WOS:000416994500010 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/78998 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Ma, YC (reprint author), Chinese Acad Sci, Inst Met Res, Shenyang 110016, Liaoning, Peoples R China.; Ma, YC (reprint author), Jiangsu Toland Alloy Co Ltd, Danyang 212352, Peoples R China. |
| Recommended Citation GB/T 7714 | Ou, Meiqiong,Ma, Yingche,Hao, Xianchao,et al. Effect of Solution Annealing on Microstructure and Mechanical Properties of a Ni-Cr-W-Fe Alloy[J]. JOURNAL MATER SCI TECHNOL,2017,33(11):1300-1307. |
| APA | Ou, Meiqiong.,Ma, Yingche.,Hao, Xianchao.,Wan, Baifang.,Liang, Tian.,...&Ma, YC .(2017).Effect of Solution Annealing on Microstructure and Mechanical Properties of a Ni-Cr-W-Fe Alloy.JOURNAL MATER SCI TECHNOL,33(11),1300-1307. |
| MLA | Ou, Meiqiong,et al."Effect of Solution Annealing on Microstructure and Mechanical Properties of a Ni-Cr-W-Fe Alloy".JOURNAL MATER SCI TECHNOL 33.11(2017):1300-1307. |
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