Effect of non-isothermal creep aging on the microstructure, mechanical properties and stress corrosion cracking resistance of 7075 alloy
文献类型：期刊论文
| 作者 | Jiang, Bo; Fan, Aoyun; Cao FH(曹富华) ; Yi, Xiaoou; Zhu, Junhao; Li, Shichen; Liu, Rui
|
| 刊名 | JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T
 |
| 出版日期 | 2023-11-01 |
| 卷号 | 27页码:4738-4749 |
| ISSN号 | 2238-7854 |
| 关键词 | Non-isothermal creep aging SCC Microchemical analysis Precipitate |
| DOI | 10.1016/j.jmrt.2023.10.258 |
| 通讯作者 | Yi, Xiaoou(xiaoouyi@ustb.edu.cn) ; Li, Shichen(740920844@qq.com) |
| 英文摘要 | The effect of non-isothermal creep aging (NICA) on the microstructure, mechanical properties, and stress corrosion cracking (SCC) resistance of 7075 alloy was investigated. The results showed that the tensile strength of the alloy increased to 565 MPa when the alloy was heated to 210 degrees C (CH210) and reached 580 MPa when it was subsequently cooled to 120 degrees C (CC120). Simultaneously, the SCC susceptibility of rtf increased from 50.8 % to 98.4 %. As compared with traditional creep aging process [1], a large strength increment with excellent stress corrosion resistance have been obtained by NICA. The microstructure revealed that a lot of dislocations have been introduced by creep during the heating stage which could improve the precipitates volume fraction and accelerate the diffusion of solutes; while during the cooling stage, eta ' was greatly refined, and GPI and GPII were re-precipitated from the matrix due to the decreased solid solubility and increased critical radius R*; both of them are responsible for the continuous strength increase during NICA. Moreover, the width of the precipitate free zone (PFZ) was narrowed from 46.1 nm (CH210) to 28.6 nm (CC120). The microchemical analysis reveals that solutes were more homogenously distributed in grain boundary precipitates (GB-ppts), matrix precipitates, the PFZ, and the matrix with the help of creep. The narrower PFZ and homogeneous solute distribution are responsible for improving the SCC susceptibility in the CC120 alloy. |
| 分类号 | 一类 |
| WOS关键词 | ZN-MG ALLOY ; GRAIN-BOUNDARY MICROCHEMISTRY ; HEAT-TREATMENT ; BEHAVIOR ; PRECIPITATION ; EMBRITTLEMENT ; SEGREGATION ; STRENGTH ; ZONES ; SPRINGBACK |
| 资助项目 | National Natural Science Foundation of China[52001033] ; National Natural Science Foundation of China[12102433] ; Innovation and Entrepreneurship Program of Jiangsu Province of China[JSSCBS20210878] ; Research and industrialization of high-performance nitrogen and oxygen sensor chips for the automotive industry[HK2021004] |
| WOS研究方向 | Materials Science ; Metallurgy & Metallurgical Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:001148243200001 |
| 资助机构 | National Natural Science Foundation of China ; Innovation and Entrepreneurship Program of Jiangsu Province of China ; Research and industrialization of high-performance nitrogen and oxygen sensor chips for the automotive industry |
| 其他责任者 | Yi, Xiaoou ; Li, Shichen |
| 源URL | [http://dspace.imech.ac.cn/handle/311007/94210]  |
| 专题 | 力学研究所_非线性力学国家重点实验室 |
| 推荐引用方式 GB/T 7714 | Jiang, Bo,Fan, Aoyun,Cao FH,et al. Effect of non-isothermal creep aging on the microstructure, mechanical properties and stress corrosion cracking resistance of 7075 alloy[J]. JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,2023,27:4738-4749. |
| APA | Jiang, Bo.,Fan, Aoyun.,曹富华.,Yi, Xiaoou.,Zhu, Junhao.,...&Liu, Rui.(2023).Effect of non-isothermal creep aging on the microstructure, mechanical properties and stress corrosion cracking resistance of 7075 alloy.JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T,27,4738-4749. |
| MLA | Jiang, Bo,et al."Effect of non-isothermal creep aging on the microstructure, mechanical properties and stress corrosion cracking resistance of 7075 alloy".JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T 27(2023):4738-4749. |
入库方式： OAI收割
来源：力学研究所
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