Effects of normal stress, surface roughness, and initial grain size on the microstructure of copper subjected to platen friction sliding deformation

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• 作者：Shan-quan Deng ; Andrew-William Godfrey…
• 关键词：copper ; surface treatment ; processing parameters ; grain refinement ; gradient microstructure ; hardness
• 刊名：International Journal of Minerals, Metallurgy, and Materials
• 出版年：2016
• 出版时间：January 2016
• 年：2016
• 卷：23
• 期：1
• 页码：57-69
• 全文大小：23,578 KB
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• 作者单位：Shan-quan Deng (1)
  Andrew-William Godfrey (1)
  Wei Liu (1)
  Cheng-lu Zhang (1)
  Ben Xu (1)
  
  1. Key Laboratory of Advanced Materials (MOE), School of Materials Science and Engineering, Tsinghua University, Beijing, 100084, China
  
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science
  Metallic Materials
  Mineral Resources
  
• 出版者：Journal Publishing Center of University of Science and Technology Beijing, in co-publication with Sp
• ISSN：1869-103X

文摘

The effects of applied normal stress, surface roughness, and initial grain size on the microstructure of pure Cu developed during platen friction sliding deformation (PFSD) processing were investigated. In each case, the deformation microstructure was characterized and the hardness of the treated surface layer was measured to evaluate its strength. The results indicated that the thickness of the deformed layer and the hardness at any depth increased with increasing normal stress. A smaller steel platen surface roughness resulted in less microstructural refinement, whereas the microstructural refinement was enhanced by decreasing the surface roughness of the Cu sample. In the case of a very large initial grain size (d > 10 mm), a sharper transition from fine-grain microstructure to undeformed material was obtained in the treated surface layer after PFSD processing.