The Formation of Submicrometer Scale Grains in a Super304H Steel During Multiple Compressions at 700C

摘要：

The deformation behavior and the microstructure evolution in a 304-type austenitic stainless steel were studied in multiple forging tests at temperature of 700℃. The flow stresses increased to its maximum value with straining to about 1 and, then, slightly decreased resulting in a steady state deformation behavior at strains above 3. The structural changes were characterized by the development of a spatial net of deformation subboundaries, the misorientations of which increased to the values typical of conventional grain boundaries. The number of ultrafine grains increased with straining, leading to development of submicrocrystalline structure. The fraction of submicrocrystalline structure composed of ultrafine grains with an average size of about 300 nm exceeded 0.7 after straining to 2.

作者: Marina Tikhonova Valeriy Dudko Andrey Belyakov Rustam Kaibyshev

作者单位: Belgorod State University,Pobeda 85,Belgorod 308015,Russia

会议类型: 国际会议

会议名称: 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)

会议地点: 南京

会议语种:英文

页码: 565-570

在线出版日期: 2011-03-01（万方平台首次上网日期，不代表论文的发表时间）