Metadynamic Recrystallization Behavior of As-cast 904L Superaustenitic Stainless Steel

被引:0
作者
Wei Zhang
Jing Zhang
Ying Han
Rong Liu
De-ning Zou
Guan-jun Qiao
机构
[1] Xi′an Jiaotong University,State Key Laboratory for Mechanical Behavior of Materials
[2] Northwestern Polytechnical University,State Key Laboratory of Solidification Processing
[3] Changchun University of Technology,Key Laboratory of Advanced Structural Materials of Ministry of Education
[4] Xi′an University of Architecture and Technology,School of Metallurgy and Engineering
来源
Journal of Iron and Steel Research International | 2016年 / 23卷
关键词
superaustenitic stainless steel; hot deformation; metadynamic recrystallization;
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中图分类号
学科分类号
摘要
The metadynamic recrystallization (MDRX) behavior of as-cast 904L superaustenitic stainless steel was investigated by double pass isothermal compression tests at temperatures of 950 – 1150 °C, strain rates of 0. 05 — 5 s−1 and interval of 1 —100 s. The effects of working parameters (deformation temperature, strain rate, pre-strain and interval time) on the flow curves and microstructural evolution were discussed. The MDRX fraction increased obviously with the increase of deformation temperature, strain rate and interval time. The MDRX softening was controlled by the migration of grain boundary, annihilation of dislocation and dynamic recrystallization. Moreover, the kinetic model was established for the prediction of MDRX behavior of as-cast 904L superaustenitic stainless steel based on the experimental data. A good agreement between the predicted and the experimental values was achieved (correlation coefficient R2 =0. 98), indicating a satisfactory accuracy.
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页码:151 / 159
页数:8
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