Influence of nano-scaled dispersed second phase on substructure of deformed dispersion strengthened copper alloy

  • Cheng Jian-yi Email author
  • Wang Ming-pu 
  • Cao Jian-guo 
  • Zhao Xue-long 
  • Guo Ming-xing 
Materials Science and Engineering


The deformation behavior of dispersion strengthened copper alloy Cu-Al2O3 was studied by TEM. The results show that nano-scaled dispersed second phase not only increases dislocation density in matrix, but also has an important influence on the dislocation substructure. The presence of fine dispersed Al2O3 particles results in a uniform and random dislocation distribution in matrix copper and causes the difficulty in formation of dislocation cell structure and the decrease in the amount of cell structure during deformation. Deformation gives rise to much more dislocations and dislocation cells form more difficultly and the decrease in the cell size with the increase of dispersion degree.

Key words

dispersed phase particle dispersion strengthened copper alloy deformation substructure 

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Copyright information

© Central South University 2005

Authors and Affiliations

  • Cheng Jian-yi 
    • 1
    • 2
    • 3
    Email author
  • Wang Ming-pu 
    • 4
  • Cao Jian-guo 
    • 3
  • Zhao Xue-long 
    • 3
  • Guo Ming-xing 
    • 4
  1. 1.School of Materials Science and EngineeringJiujiang UniversityJiujiangChina
  2. 2.School of Metallurgy Science and EngineeringCentral South UniversityChangshaChina
  3. 3.Hailiang Group Co. LtdZhujiChina
  4. 4.School of Materials Science and EngineeringCentral South UniversityChangshaChina

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