Nanostructure Evolution in an Austenitic Stainless Steel Subjected to Multiple Forging at Ambient Temperature
Deformation behavior and structural changes were studied in a 304-type austenitic stainless steel subjected to large strain multiple forging at an ambient temperature. The number of forging passes was 10, leading to the total cumulative strain of 4.0. The yield stress rapidly increased to about 1000 MPa after the first forging pass and then gradually approached a saturation level of about 2000 MPa in large strains. The grain/subgrain size decreased to about 50 nm at total strain of about 2. This grain/subgrain size reduced a little upon further processing; and comprised 35 nm after a total strain of 4.0. The fast kinetics for grain refinement was associated with deformation twinning and straininduced martensitic transformation. The both of them resulted in fast grain subdivision at relatively small strains.
Andrey Belyakov Kaneaki Tsuzaki Rustam Kaibyshev
Belgorod State University,Pobeda 85,Belgorod 308015,Russia National Institute for Materials Science,Sengen 1-2-1,Tsukuba,Ibaraki 050047,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
553-558
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）