Microstructure Evolution in a Cu-Ag Alloy during Large Strain Deformation and Annealing
The structural changes and the strengthening of a Cu-3%Ag alloy subjected to large strain drawing and subsequent annealing were studied. The cold working was carried out at an ambient temperature up to total strain above 8. The hardness increased from 600 MPa in the initial state to about 1800 MPa with increasing the total strain. The annealing treatment at 400℃ resulted in increase in the hardness to about 2000 MPa for the samples cold worked to total strains above 2. On the other hand, the hardness change of the samples annealed at 450℃ dependent significantly on the preceding cold strain. Namely, annealing softening took place in the samples processed to strains below 5, while the samples processed to larger strains were characterized by remarkable hardening after annealing. The value of annealing hardening increased with increasing the previous cold strain, leading the hardness to 2500 MPa in the sample strained to 7.4. The cold worked and annealed samples were characterized by the development of lamella-type microstructure consisting of highly elongated copper grains with uniform distribution of nano-scaled silver particles having a size of about 2 nm.
laroslava Shakhova Yoshikazu Sakai Andrey Belyakov Rustam Kaibyshev
Belgorod State University,Pobeda 85,Belgorod 308015,Russia National Institute for Materials Science,Sengen 1-2-1,Tsukuba,Ibaraki 305-0047,Japan
国际会议
5th International Conference on Nanomaterials by Severe Plastic Deformation(第五届剧烈塑性变形纳米材料国际会议)
南京
英文
493-498
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）