| The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures | |
| Zhang, GY; Guo, JT; Zhou, LZ; Li, GS; Ye, HQ | |
| Corresponding Author | Zhang, GY() |
| 2005 | |
| Source Publication | PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5
 |
| ISSN | 0255-5476 |
| Volume | 475-479Pages:2623-2626 |
| Abstract | The microstructure and tensile mechanical properties of directionally Solidified NiAl-15Cr alloy at various temperatures have been investigated in this paper. The results reveal that the microstructure consists of dendritic beta-NiAl phase, interdendritic gamma/gamma', gamma' phase transient layer and alpha-Cr precipitation in beta-NiAl phase. With the increase of temperature obvious Brittle-Ductile-Transition (BDT) behavior is observed and the BDT temperature (BDTT) is sensitive to initial strain rate. When the initial strain rate increases by two-order magnitude, the BDTT has an approximate 150K increase. In the temperature range of 1123-1373K, the alloy exhibits good tensile plasticity and poor strength comparing with the NiAl/Cr(Mo,Hf) alloy. Superplastic-like deformation behavior with large elongation (exceed 200%) is achieved at 1323K. The balance between strain hardening (by dislocation glide) and strain softening (dynamic recover and recrystallization) is responsible for the large tensile elongation of this alloy. |
| Keyword | NiAl intermetallics microstructure BDT 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:000227494703024 |
| Publisher | TRANS TECH PUBLICATIONS LTD |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/82624 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Zhang, GY |
| Affiliation | 1.Chinese Acad Sci, Met Res Inst, Dept Superalloys, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Met Res Inst, Atom Imaging Solids Lab, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Zhang, GY,Guo, JT,Zhou, LZ,et al. The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures[J]. PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5,2005,475-479:2623-2626. |
| APA | Zhang, GY,Guo, JT,Zhou, LZ,Li, GS,&Ye, HQ.(2005).The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures.PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5,475-479,2623-2626. |
| MLA | Zhang, GY,et al."The microstructure and mechanical properties of directionally solidified NiAl-15Cr alloy at various temperatures".PRICM 5: THE FIFTH PACIFIC RIM INTERNATIONAL CONFERENCE ON ADVANCED MATERIALS AND PROCESSING, PTS 1-5 475-479(2005):2623-2626. |
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