| Effects of Hf additions on high-temperature mechanical properties of a directionally solidified NiAl/Cr(Mo) eutectic alloy | |
| Cui, C. Y.; Guo, J. T.; Ye, H. Q. | |
| Corresponding Author | Cui, C. Y.(Cui.chuanyong@nims.go.jp) |
| 2008-09-08 | |
| Source Publication | JOURNAL OF ALLOYS AND COMPOUNDS
 |
| ISSN | 0925-8388 |
| Volume | 463Issue:1-2Pages:263-270 |
| Abstract | In order to improve the high-temperature mechanical properties of NiAl/Cr(Mo) alloys, the effects of Hf additions on microstructure and mechanical properties were systemically examined. Two directionally solidified alloys with composition of Ni-32Al-28Cr-(6-x)Mo-xHf (x = 0.2 and 0.5 at.%. respectively), named as 0.2Hf and 0.5Hf hereafter, were prepared. The Hf additions disturbed the cellular structure. The 0.2Hf alloy consisted of dendritic structure, while the 0.51-If alloy had an intercellular structure. In the 0.51-If alloy, the Ni2AlHf and Ni16Hf6Si7 precipitates were also confirmed. The high-temperature strength and brittle-to-ductile transition temperature (BDTT) increased with increasing of Hf additions, due to the different strengthening mechanism. In contrast, the ductility and creep resistance decreased with increasing off-If because of the disturbance of cellular structure. (C) 2007 Elsevier B.V. All rights reserved. |
| Keyword | intermetallics casting scanning and transmission electron microscopy high-temperature alloys |
| DOI | 10.1016/j.jallcom.2007.08.065 |
| Indexed By | SCI |
| Language | 英语 |
| WOS Research Area | Chemistry ; Materials Science ; Metallurgy & Metallurgical Engineering |
| WOS Subject | Chemistry, Physical ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering |
| WOS ID | WOS:000258697300048 |
| Publisher | ELSEVIER SCIENCE SA |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/93212 |
| Collection | 中国科学院金属研究所 |
| Corresponding Author | Cui, C. Y. |
| Affiliation | Chinese Acad Sci, Met Res Inst, Shenyang 110016, Peoples R China |
| Recommended Citation GB/T 7714 | Cui, C. Y.,Guo, J. T.,Ye, H. Q.. Effects of Hf additions on high-temperature mechanical properties of a directionally solidified NiAl/Cr(Mo) eutectic alloy[J]. JOURNAL OF ALLOYS AND COMPOUNDS,2008,463(1-2):263-270. |
| APA | Cui, C. Y.,Guo, J. T.,&Ye, H. Q..(2008).Effects of Hf additions on high-temperature mechanical properties of a directionally solidified NiAl/Cr(Mo) eutectic alloy.JOURNAL OF ALLOYS AND COMPOUNDS,463(1-2),263-270. |
| MLA | Cui, C. Y.,et al."Effects of Hf additions on high-temperature mechanical properties of a directionally solidified NiAl/Cr(Mo) eutectic alloy".JOURNAL OF ALLOYS AND COMPOUNDS 463.1-2(2008):263-270. |
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