Pre-aging combined with multi-stage rolling processing: Enhancing precipitate-dislocation interaction for strengthening of Cu-Cr-Zr-Ni-Si alloy
The low strength of high-conductivity Cu-Cr-Zr alloys has restricted their application in micro-structural lead frames. This study introduces pre-aging multi-stage rolling processes to generate high-density dislocations via pre-precipitated Cr phases in a Cu-Cr-Zr-Ni-Si alloy, enhancing its hardenin...
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| Format: | Article |
| Language: | English |
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Elsevier
2025-08-01
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| Series: | Materials & Design |
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| Online Access: | http://www.sciencedirect.com/science/article/pii/S0264127525007853 |
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| author | Xiangyi Jiao Zihao Zhang Hua Ding |
| author_facet | Xiangyi Jiao Zihao Zhang Hua Ding |
| author_sort | Xiangyi Jiao |
| collection | DOAJ |
| description | The low strength of high-conductivity Cu-Cr-Zr alloys has restricted their application in micro-structural lead frames. This study introduces pre-aging multi-stage rolling processes to generate high-density dislocations via pre-precipitated Cr phases in a Cu-Cr-Zr-Ni-Si alloy, enhancing its hardening effect. The results show that the alloy processed by this thermomechanical treatment achieves an excellent combination of strength and conductivity: a tensile strength of ∼680 MPa and electrical conductivity near 70 % IACS. Pre-aging modifies the geometric features of Cr precipitates, promoting strong interactions with dislocations during subsequent cold rolling. Hardening model calculations indicate that the alloy’s reinforcement stems from the dislocation density strengthening and precipitation hardening. This work demonstrates that the pre-aging multi-stage rolling process can produce materials with superior comprehensive properties, holding promise for large-scale industrial applications of high-strength, high-conductivity copper alloys. |
| format | Article |
| id | doaj-art-76cf151e6db64ffdbfa31765a4b57c26 |
| institution | Kabale University |
| issn | 0264-1275 |
| language | English |
| publishDate | 2025-08-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Materials & Design |
| spelling | doaj-art-76cf151e6db64ffdbfa31765a4b57c262025-08-20T03:50:21ZengElsevierMaterials & Design0264-12752025-08-0125611436510.1016/j.matdes.2025.114365Pre-aging combined with multi-stage rolling processing: Enhancing precipitate-dislocation interaction for strengthening of Cu-Cr-Zr-Ni-Si alloyXiangyi Jiao0Zihao Zhang1Hua Ding2School of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Key Laboratory of Lightweight Structural Materials, Liaoning Province, Northeastern University, Shenyang 110819, China; Corresponding authors.School of Materials Science and Engineering, Northeastern University, Shenyang 110819, ChinaSchool of Materials Science and Engineering, Northeastern University, Shenyang 110819, China; Key Laboratory of Lightweight Structural Materials, Liaoning Province, Northeastern University, Shenyang 110819, China; Corresponding authors.The low strength of high-conductivity Cu-Cr-Zr alloys has restricted their application in micro-structural lead frames. This study introduces pre-aging multi-stage rolling processes to generate high-density dislocations via pre-precipitated Cr phases in a Cu-Cr-Zr-Ni-Si alloy, enhancing its hardening effect. The results show that the alloy processed by this thermomechanical treatment achieves an excellent combination of strength and conductivity: a tensile strength of ∼680 MPa and electrical conductivity near 70 % IACS. Pre-aging modifies the geometric features of Cr precipitates, promoting strong interactions with dislocations during subsequent cold rolling. Hardening model calculations indicate that the alloy’s reinforcement stems from the dislocation density strengthening and precipitation hardening. This work demonstrates that the pre-aging multi-stage rolling process can produce materials with superior comprehensive properties, holding promise for large-scale industrial applications of high-strength, high-conductivity copper alloys.http://www.sciencedirect.com/science/article/pii/S0264127525007853Cu-Cr-Zr-Ni-Si alloyPre-aging multi-stage rolling processesStrengthElectrical conductivity |
| spellingShingle | Xiangyi Jiao Zihao Zhang Hua Ding Pre-aging combined with multi-stage rolling processing: Enhancing precipitate-dislocation interaction for strengthening of Cu-Cr-Zr-Ni-Si alloy Materials & Design Cu-Cr-Zr-Ni-Si alloy Pre-aging multi-stage rolling processes Strength Electrical conductivity |
| title | Pre-aging combined with multi-stage rolling processing: Enhancing precipitate-dislocation interaction for strengthening of Cu-Cr-Zr-Ni-Si alloy |
| title_full | Pre-aging combined with multi-stage rolling processing: Enhancing precipitate-dislocation interaction for strengthening of Cu-Cr-Zr-Ni-Si alloy |
| title_fullStr | Pre-aging combined with multi-stage rolling processing: Enhancing precipitate-dislocation interaction for strengthening of Cu-Cr-Zr-Ni-Si alloy |
| title_full_unstemmed | Pre-aging combined with multi-stage rolling processing: Enhancing precipitate-dislocation interaction for strengthening of Cu-Cr-Zr-Ni-Si alloy |
| title_short | Pre-aging combined with multi-stage rolling processing: Enhancing precipitate-dislocation interaction for strengthening of Cu-Cr-Zr-Ni-Si alloy |
| title_sort | pre aging combined with multi stage rolling processing enhancing precipitate dislocation interaction for strengthening of cu cr zr ni si alloy |
| topic | Cu-Cr-Zr-Ni-Si alloy Pre-aging multi-stage rolling processes Strength Electrical conductivity |
| url | http://www.sciencedirect.com/science/article/pii/S0264127525007853 |
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