Microstructure and texture evolution of Cu-Cr-Co-Ti alloys during the two-stage cryorolling

Jia-Jun Zhang ¹Long-Jian Li ²Zhi-Feng Liu ²Zong-Ning Chen ³En-Yu Guo ³Hui-Jun Kang ³Ren-Geng Li ⁴Tong-Min Wang³

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作者信息

1. Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China;Center of Hyper-Gravity Experimental and Interdisciplinary Research,Zhejiang University,Hangzhou 310058,China
2. Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China
3. Key Laboratory of Solidification Control and Digital Preparation Technology(Liaoning Province),School of Materials Science and Engineering,Dalian University of Technology,Dalian 116024,China;Ningbo Institute of Dalian University of Technology,Ningbo 315000,China
4. Key Laboratory for Light-weight Materials,Nanjing Tech University,Nanjing 210009,China
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Abstract

This study entailed an investigation of the mechanical properties,microstructural and texture orien-tation evolutions of Cu-Cr-Co-Ti alloys prepared via two-stage cryorolling and intermediate aging treatment.To this end,X-ray diffraction and electron backscatter diffraction were employed.The results indicate that the two-stage cryorolling and intermediate aging treatments led to the development of profuse twin bundles and significantly enhanced the mechanical properties.The initial cryorolling led to coplanar slip and developed a strong Y({111}<112>)orientation,accelerating the formation of Goss({011}<100>)orientation and a Brass-type texture.The intermediate aging treatment relieved the restriction on dislocation slip and reoriented the grains toward the Cop-per({112}<111>)and Z({111}<110>)orientations.The Z orientation,with a relatively high volume fraction,dominated the macrotexture.Secondary cryorolling intensified twinning and shear banding,transforming the Copper-type shear bands into Brass-type shear bands with rhomboidal prism morphology.The areas inside the Brass-type shear bands exhibited a Y orientation,and the areas outside the shear bands exhibited a stable Brass-type tex-ture.The evident decrease in the weighted Schmid factors demonstrated that the two-stage cryorolling and interme-diate aging treatment can modify the texture evolution and aid the design of high-performance Cu alloys.

Key words

Copper alloys/Two-stage cryorolling/Macrotexture evolution/Electron backscatter diffraction/Schmid factor

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基金项目

National Natural Science Foundation of China(52271025)

National Natural Science Foundation of China(51927801)

National Natural Science Foundation of China(U22A20174)

Science and Technology Planning Project of Liaoning Province(2023JH2/101700295)

Innovation Foundation of Science and the Technology of Dalian(2023JJ12GX021)

Natural Science Foundation of Jiangsu Province(BK20200695)

出版年

2024

稀有金属(英文版)

中国有色金属学会

稀有金属(英文版)

CSTPCDCSCDEI

影响因子：0.801

ISSN：1001-0521

参考文献量50

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