| Superplasticity in NiAl intermetallics macroalloyed with iron | |
| W. L. Zhou; J. T. Guo; R. S. Chen; G. S. Li; J. Y. Zhou | |
| 2001 | |
| Source Publication | Materials Letters
 |
| ISSN | 0167-577X |
| Volume | 47Issue:1-2Pages:30-34 |
| Abstract | In this paper, we aim to examine the superplastic behavior of an extruded Ni-28.5Al-20.4Fe (at.%) alloy, which consists of beta+gamma phases with an average linear intercept grain size of 30-50 mum. Its tensile properties were determined at temperatures from 1123 to 1323 K and initial strain rates from 1.04 x 10(-2) to 1.04 x 10(-4) s(-1). A maximum elongation of 233% was obtained at 1123 K and a strain rate of 5.2 x 10(-4) s(-1). Transmission electron microscope (TEM) observation found many dislocation-free grains adjacent to grains with a high-dislocation density and subgrains and subgrain boundaries, which indicate that dynamic recrystallization has occurred as an efficient accommodation mechanism. Scanning electron microscope (SEM) examination of the fracture sample after superplastic deformation reveals many voids on the fracture surface. By correlating with the results of TEM observation, it is suggested that the superplastic deformation in this alloy should be controlled by a grain boundary sliding-based mechanism accommodated by the movement of dislocation and dynamic recrystallization. (C) 2001 Elsevier Science B.V. All rights reserved. |
| description.department | chinese acad sci, inst met res, shenyang 110015, peoples r china. dalian univ technol, dept mat engn, dalian 116024, peoples r china.;guo, jt (reprint author), chinese acad sci, inst met res, 72 wenhua rd, shenyang 110015, peoples r china |
| Keyword | Nial Intermetallics Superplastics Deformation-behavior Alloys Microstructure Boron |
| URL | 查看原文 |
| WOS ID | WOS:000166242400006 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/36957 |
| Collection | 中国科学院金属研究所 |
| Recommended Citation GB/T 7714 | W. L. Zhou,J. T. Guo,R. S. Chen,et al. Superplasticity in NiAl intermetallics macroalloyed with iron[J]. Materials Letters,2001,47(1-2):30-34. |
| APA | W. L. Zhou,J. T. Guo,R. S. Chen,G. S. Li,&J. Y. Zhou.(2001).Superplasticity in NiAl intermetallics macroalloyed with iron.Materials Letters,47(1-2),30-34. |
| MLA | W. L. Zhou,et al."Superplasticity in NiAl intermetallics macroalloyed with iron".Materials Letters 47.1-2(2001):30-34. |
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