Effects of pre-aging and minor Sc addition on the microstructure and mechanical properties of friction stir processed 7055 Al alloy
文献类型：期刊论文
| 作者 | Liu, CY; Zhang, B; Ma, ZY; Teng, GB; Wei, LL; Zhou, WB; Zhang, XY; Liu, CY (reprint author), Guilin Univ Technol, Key Lab New Proc Technol Nonferrous Met & Mat, Minist Educ, Guilin 541004, Peoples R China.; Ma, ZY (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China. |
| 刊名 | VACUUM
 |
| 出版日期 | 2018-03-01 |
| 卷号 | 149页码:106-113 |
| 关键词 | Mg-cu Alloy Stress-corrosion Cracking Low-temperature Superplasticity Aluminum-alloy Base-metal Strength Strain Joints Zr Parameters |
| ISSN号 | 0042-207X |
| 英文摘要 | The effects of Sc addition and pre-aging on the microstructure and mechanical properties of friction stir processed (FSP) 7055 Al alloy were investigated. The addition of Sc effectively inhibited the coarsening of grains in the FSP 7055 Al alloy due to the grain boundary pinning effect of Al-3(Sc,Zr) particles. The high density of Al-3(Sc,Zr) particles also provided more preferential nucleation sites for the precipitation of the ri phase during FSP, and then inhibited the coarsening and increased the density of the ri phase in the FSP 7055 alloy. The re phase precipitated in the 7055 and Sc-containing 7055 during artificial aging, and then dissolved into the Al matrix during FSP. Thus, pre-aging effectively inhibited the formation of the eta phase during FSP, and increased the quantity of the solute atoms in the FSP samples. The mechanical properties of the FSP 7055 Al alloy were improved by the addition of Sc and pre-aging. The aged 7055-0.25Sc Al alloy with FSP showed the highest ultimate tensile strength of 578 MPa; and the aged 7055 Al alloy with FSP showed the largest elongation of 21%. This work provides an effective strategy to improve the mechanical properties of FSP Al alloys. (C) 2017 Elsevier Ltd. All rights reserved.; The effects of Sc addition and pre-aging on the microstructure and mechanical properties of friction stir processed (FSP) 7055 Al alloy were investigated. The addition of Sc effectively inhibited the coarsening of grains in the FSP 7055 Al alloy due to the grain boundary pinning effect of Al-3(Sc,Zr) particles. The high density of Al-3(Sc,Zr) particles also provided more preferential nucleation sites for the precipitation of the ri phase during FSP, and then inhibited the coarsening and increased the density of the ri phase in the FSP 7055 alloy. The re phase precipitated in the 7055 and Sc-containing 7055 during artificial aging, and then dissolved into the Al matrix during FSP. Thus, pre-aging effectively inhibited the formation of the eta phase during FSP, and increased the quantity of the solute atoms in the FSP samples. The mechanical properties of the FSP 7055 Al alloy were improved by the addition of Sc and pre-aging. The aged 7055-0.25Sc Al alloy with FSP showed the highest ultimate tensile strength of 578 MPa; and the aged 7055 Al alloy with FSP showed the largest elongation of 21%. This work provides an effective strategy to improve the mechanical properties of FSP Al alloys. (C) 2017 Elsevier Ltd. All rights reserved. |
| 学科主题 | Materials Science, Multidisciplinary ; Physics, Applied |
| 语种 | 英语 |
| 资助机构 | National Natural Science Foundation of China [51601045]; Guangxi "Bagui" Teams for Innovation and Research; Research Program of Science and Technology of Guangxi [GKAB16380021]; Guangxi Natural Science Foundation [2016GXNSFDA380028] |
| 公开日期 | 2018-06-05 |
| 源URL | [http://ir.imr.ac.cn/handle/321006/79467]  |
| 专题 | 金属研究所_中国科学院金属研究所 |
| 通讯作者 | Liu, CY (reprint author), Guilin Univ Technol, Key Lab New Proc Technol Nonferrous Met & Mat, Minist Educ, Guilin 541004, Peoples R China.; Ma, ZY (reprint author), Chinese Acad Sci, Shenyang Natl Lab Mat Sci, Inst Met Res, 72 Wenhua Rd, Shenyang 110016, Liaoning, Peoples R China. |
| 推荐引用方式 GB/T 7714 | Liu, CY,Zhang, B,Ma, ZY,et al. Effects of pre-aging and minor Sc addition on the microstructure and mechanical properties of friction stir processed 7055 Al alloy[J]. VACUUM,2018,149:106-113. |
| APA | Liu, CY.,Zhang, B.,Ma, ZY.,Teng, GB.,Wei, LL.,...&Ma, ZY .(2018).Effects of pre-aging and minor Sc addition on the microstructure and mechanical properties of friction stir processed 7055 Al alloy.VACUUM,149,106-113. |
| MLA | Liu, CY,et al."Effects of pre-aging and minor Sc addition on the microstructure and mechanical properties of friction stir processed 7055 Al alloy".VACUUM 149(2018):106-113. |
入库方式： OAI收割
来源：金属研究所
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