Aging process and strengthening mechanism of Cu–Cr–Ni alloy with superior stress relaxation resistance
With the development trend of connectors to high-current and high-temperature service, copper alloy connectors are required to have superior stress relaxation resistance. In this work, the optimal aging parameter was explored via stress relaxation resistance, strength, microhardness, and conductivit...
| Main Authors: | , , , , , , , |
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| Format: | Article |
| Language: | English |
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Elsevier
2022-07-01
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| Series: | Journal of Materials Research and Technology |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2238785422009218 |
| _version_ | 1817999763460587520 |
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| author | Guojie Wang Haitao Liu Kexing Song Yanjun Zhou Chu Cheng Huiwen Guo Yingang Guo Jing Tian |
| author_facet | Guojie Wang Haitao Liu Kexing Song Yanjun Zhou Chu Cheng Huiwen Guo Yingang Guo Jing Tian |
| author_sort | Guojie Wang |
| collection | DOAJ |
| description | With the development trend of connectors to high-current and high-temperature service, copper alloy connectors are required to have superior stress relaxation resistance. In this work, the optimal aging parameter was explored via stress relaxation resistance, strength, microhardness, and conductivity. And the strengthening mechanism of stress relaxation was investigated through the TEM and EBSD microscopic characterization. The results show that the Cu–Cr–Ni alloy reached the peak aging state under 450 °C for 1 h and obtained excellent properties. Especially, the percentage of residual stress in the relaxation test reached 93.1%. The microhardness associated with aging strengthening showed a positive correlation with yield strength and stress relaxation resistance. Then the microhardness after aging can be used as a simple evaluation index of stress relaxation resistance. The Cu–Cr–Ni alloy with superior stress relaxation resistance is mainly related to dislocation strengthening, second phase strengthening, and the coexistence of spinodal decomposition and ordering. |
| first_indexed | 2024-04-14T03:13:23Z |
| format | Article |
| id | doaj.art-1d712746db5340acb4870c2f5501691a |
| institution | Directory Open Access Journal |
| issn | 2238-7854 |
| language | English |
| last_indexed | 2024-04-14T03:13:23Z |
| publishDate | 2022-07-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Journal of Materials Research and Technology |
| spelling | doaj.art-1d712746db5340acb4870c2f5501691a2022-12-22T02:15:33ZengElsevierJournal of Materials Research and Technology2238-78542022-07-011935793591Aging process and strengthening mechanism of Cu–Cr–Ni alloy with superior stress relaxation resistanceGuojie Wang0Haitao Liu1Kexing Song2Yanjun Zhou3Chu Cheng4Huiwen Guo5Yingang Guo6Jing Tian7School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, ChinaSchool of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China; Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Henan Province, Luoyang, 471023, PR China; Corresponding author.Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Henan Province, Luoyang, 471023, PR China; Henan Academy of Sciences, Zhengzhou, 450002, China; Corresponding author.School of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China; Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Henan Province, Luoyang, 471023, PR ChinaSchool of Materials Science and Engineering, Henan University of Science and Technology, Luoyang, 471023, China; Provincial and Ministerial Co-construction of Collaborative Innovation Center for Non-ferrous Metal New Materials and Advanced Processing Technology, Henan Province, Luoyang, 471023, PR ChinaChinalco Luoyang Copper Processing Co., Ltd, Luoyang, 471039, ChinaHenan Zhongyuan Gold Smelter., LLC, Sanmenxia, 472100, ChinaHenan Zhongyuan Gold Smelter., LLC, Sanmenxia, 472100, ChinaWith the development trend of connectors to high-current and high-temperature service, copper alloy connectors are required to have superior stress relaxation resistance. In this work, the optimal aging parameter was explored via stress relaxation resistance, strength, microhardness, and conductivity. And the strengthening mechanism of stress relaxation was investigated through the TEM and EBSD microscopic characterization. The results show that the Cu–Cr–Ni alloy reached the peak aging state under 450 °C for 1 h and obtained excellent properties. Especially, the percentage of residual stress in the relaxation test reached 93.1%. The microhardness associated with aging strengthening showed a positive correlation with yield strength and stress relaxation resistance. Then the microhardness after aging can be used as a simple evaluation index of stress relaxation resistance. The Cu–Cr–Ni alloy with superior stress relaxation resistance is mainly related to dislocation strengthening, second phase strengthening, and the coexistence of spinodal decomposition and ordering.http://www.sciencedirect.com/science/article/pii/S2238785422009218Cu–Cr–Ni alloyAging processStress relaxationSpinodal decomposition |
| spellingShingle | Guojie Wang Haitao Liu Kexing Song Yanjun Zhou Chu Cheng Huiwen Guo Yingang Guo Jing Tian Aging process and strengthening mechanism of Cu–Cr–Ni alloy with superior stress relaxation resistance Journal of Materials Research and Technology Cu–Cr–Ni alloy Aging process Stress relaxation Spinodal decomposition |
| title | Aging process and strengthening mechanism of Cu–Cr–Ni alloy with superior stress relaxation resistance |
| title_full | Aging process and strengthening mechanism of Cu–Cr–Ni alloy with superior stress relaxation resistance |
| title_fullStr | Aging process and strengthening mechanism of Cu–Cr–Ni alloy with superior stress relaxation resistance |
| title_full_unstemmed | Aging process and strengthening mechanism of Cu–Cr–Ni alloy with superior stress relaxation resistance |
| title_short | Aging process and strengthening mechanism of Cu–Cr–Ni alloy with superior stress relaxation resistance |
| title_sort | aging process and strengthening mechanism of cu cr ni alloy with superior stress relaxation resistance |
| topic | Cu–Cr–Ni alloy Aging process Stress relaxation Spinodal decomposition |
| url | http://www.sciencedirect.com/science/article/pii/S2238785422009218 |
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