| Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP | |
| Alternative Title | Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP |
| Yan Ying1; Qi Yue1; Chen Lijia1; Li Xiaowu1 | |
| 2016 | |
| Source Publication | TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA
 |
| ISSN | 1003-6326 |
| Volume | 26Issue:4Pages:966-973 |
| Abstract | To explore the effect of strain rate (epsilon) over dot on the high temperature deformation characteristics of ultrafine-grained materials, the deformation and damage features as well as microstructures of ECAP-treated pure Al at different temperatures T and strain rates (epsilon) over dot were systematically studied through compression tests and microscopic observations. The increase in (epsilon) over dot eliminates strain softening at T = 473 K and secondary SBs basically disappear at 1x10(-3) s(-1); however, at 1x10(-2) s(-1), cracks are only observed at temperature below 473 K, and secondary SBs become clearer at T >= 473 K. The microstructures of ECAP-treated Al mainly consist of sub-grains (SGs). The increase in (epsilon) over dot inhibits the SG growth, thus leading to the increases both in yield strength and flow stress at high temperatures. |
| Other Abstract | To explore the effect of strain rate e& on the high temperature deformation characteristics of ultrafine-grained materials, the deformation and damage features as well as microstructures of ECAP-treated pure Al at different temperatures T and strain rates e& were systematically studied through compression tests and microscopic observations. The increase in ? eliminates strain softening at T≤473 K, and largely enhances the yield strength and flow stress at 473-573 K. The shear deformation dominates the plastic deformation of ECAP-treated Al. Many cracks along shear bands (SBs) are formed at T≥473 K and secondary SBs basically disappear at 1×10~(-3) s~(-1); however, at 1×10~(-2) s~(-1), cracks are only observed at temperature below 473 K, and secondary SBs become clearer at T≥473 K. The microstructures of ECAP-treated Al mainly consist of sub-grains (SGs). The increase in ? inhibits the SG growth, thus leading to the increases both in yield strength and flow stress at high temperatures. |
| Keyword | RATE SENSITIVITY MECHANICAL-PROPERTIES BEHAVIOR COPPER CU ALLOY AL MICROSTRUCTURE FEATURES METALS equal channel angular pressing (ECAP) pure Al strain rate high temperature compression deformation damage microstructure |
| Indexed By | CSCD |
| Language | 英语 |
| Funding Project | [National Natural Science Foundation of China] |
| CSCD ID | CSCD:5702929 |
| Citation statistics | |
| Document Type | 期刊论文 |
| Identifier | http://ir.imr.ac.cn/handle/321006/144474 |
| Collection | 中国科学院金属研究所 |
| Affiliation | 1.中国科学院金属研究所 2.上海市地震局 |
| Recommended Citation GB/T 7714 | Yan Ying,Qi Yue,Chen Lijia,et al. Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP[J]. TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,2016,26(4):966-973. |
| APA | Yan Ying,Qi Yue,Chen Lijia,&Li Xiaowu.(2016).Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP.TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA,26(4),966-973. |
| MLA | Yan Ying,et al."Strain rate-dependent high temperature compressive deformation characteristics of ultrafine-grained pure aluminum produced by ECAP".TRANSACTIONS OF NONFERROUS METALS SOCIETY OF CHINA 26.4(2016):966-973. |
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