Effect of withdrawal rate on microstructure and mechanical properties of a directionally solidified NiAl-based hypoeutectic alloy doped with trace Hf and Ho
文献类型：期刊论文
| 作者 | J. T. Guo ; Y. Xie ; L. Y. Sheng ; L. Z. Zhou ; Y. C. Liang |
| 刊名 | Intermetallics
 |
| 出版日期 | 2011 |
| 卷号 | 19期号:2页码:206-211 |
| 关键词 | Nickel aluminides based on NiAl Mechanical properties at ambient temperature Mechanical properties at high temperatures Crystal growth Microstructure temperature fracture-toughness rod-plate transition in-situ composites eutectic alloy compressive properties deformation strength cr systems mo |
| ISSN号 | 0966-9795 |
| 中文摘要 | The hypoeutectic alloy, with nominal composition NiAl-31Cr-2.9Mo-0.1Hf-0.05Ho (at.%), was directionally solidified at three different withdrawal rates by liquid metal (Sn) cooling technique. Microstructural examination reveals that directional solidification gave rise to a shift in the coupled zone for the eutectic growth towards the Cr(Mo) phase. With the withdrawal rates increasing from 3 mm/min to 15 mm/min, the volume fraction of primary dendritic NiAl increases from 21.1% to 25.9%, while the size and the arm spacing of NiAl primary dendrite reduces simultaneously. The room temperature (RT) fracture toughness and the tensile strength at RT and elevated temperature (1373 K) present the valley value at intermediate rate (8 mm/min) among the withdrawal rate range which could be attributed to the decrease in volume fraction of eutectic NiAl/Cr(Mo) microstructure and the refinement of microstructure resulted from the increase of withdrawal rates. In terms of RT tensile elongation, the DS alloy grown at different withdrawal rates all break with no plastic flow. (C) 2010 Elsevier Ltd. All rights reserved. |
| 原文出处 | |
| 公开日期 | 2012-04-13 |
| 源URL | [http://210.72.142.130/handle/321006/30366]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 推荐引用方式 GB/T 7714 | J. T. Guo,Y. Xie,L. Y. Sheng,et al. Effect of withdrawal rate on microstructure and mechanical properties of a directionally solidified NiAl-based hypoeutectic alloy doped with trace Hf and Ho[J]. Intermetallics,2011,19(2):206-211. |
| APA | J. T. Guo,Y. Xie,L. Y. Sheng,L. Z. Zhou,&Y. C. Liang.(2011).Effect of withdrawal rate on microstructure and mechanical properties of a directionally solidified NiAl-based hypoeutectic alloy doped with trace Hf and Ho.Intermetallics,19(2),206-211. |
| MLA | J. T. Guo,et al."Effect of withdrawal rate on microstructure and mechanical properties of a directionally solidified NiAl-based hypoeutectic alloy doped with trace Hf and Ho".Intermetallics 19.2(2011):206-211. |
入库方式： OAI收割
来源：金属研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。