Anomalous Property Evolution during Annealing in HPTed SUS 304 Austenitic Stainless Steel
Abstract SUS 304 austenitic stainless steel (ASS) was deformed by high pressure torsion (HPT) to obtain 100% volume fraction of martensite (a1) from a fully austenitic (y) matrix. Deformation caused an increase in hardness (Hv) from 1.6 GPa in the as annealed state to 6.4 GPa after HPT. Deformed samples were then annealed in the range 200 -600℃ and peak hardness of 7.8 GPa was observed after annealing at 400℃ for 1 hour. Differential scanning calorimetry (DSC) and electrical resistivity tests showed that the deformed alloy undergoes a two stage phase transformation on heating from room temperature up to 700℃. The first stage of transformation was associated with hardening behavior while the second one which is reverse α→β transformation resulted in a reduction in hardness. Annealing at 400℃ after deformation was found to increase the magnetization saturation (Msat) values.
Innocent Shuro Minoru Umemoto Yoshikazu Todaka Ho-Hung Kuo Hongcai Wang
Department of Production Systems Engineering,Toyohashi University of Technology,Toyohashi,Aichi,441-8580 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
589-592
2011-03-01（万方平台首次上网日期，不代表论文的发表时间）