The dynamic recrystallization (DRX) microstructures were studied in a 304-type stainless steel deformed at temperatures from 1023 K to 1223 K and at a strain rate of about 10-3 s-1. Both the dynamic grain size and the dynamic subgrain size were shown to depend on deformation conditions, and they could be expressed by different power-law functions of flow stresses. The subgrain size was related to the flow stress with a size exponent of about -1.0, while the grain size exponent was about -0.7. With increasing the deformation temperature, the fraction of the high-angle grain boundaries against all the strain-induced (sub)boundaries decreased from about 70% at 1023 K to 40% at 1223 K. The deformation microstructures are discussed in some detail with reference to the mechanisms of microstructure evolution that operated upon DRX.
|ジャーナル||Materials Science Forum|
|出版ステータス||出版済み - 1 1 2003|
|イベント||Thermec 2003 Processing and Manufacturing of Advanced Materials - Madrid, スペイン|
継続期間: 7 7 2003 → 7 11 2003
All Science Journal Classification (ASJC) codes