High-Temperature Severe Plastic Deformation of Ferritic Steel by Torsion

被引:1
|
作者
Setiawan, Aries [1 ]
Terada, Daisuke [1 ]
Tsuji, Nobuhiro [1 ]
机构
[1] Kyoto Univ, Grad Sch Engn, Dept Mat Sci & Engn, Sakyo Ku, Kyoto 6068501, Japan
关键词
Grain refinement; Grain subdivision; High-angle grain boundary; Shear strain;
D O I
10.4028/www.scientific.net/MSF.667-669.403
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
An ultra-low carbon IF steel was heavily deformed up to an equivalent strain of 36 at various high temperatures of ferrite single-phase region and various strain rates. Effects of temperature and strain rate on the microstructures evolved in torsion deformation were clarified. On the other hand, it was found that homogeneous ultrafine grained structures were not obtained by the present torsion deformation though very high strain was applied. The coarser grain sizes than those obtained by conventional severe plastic deformation (like ARB) were due to the deformation at higher temperature and lower strain rate, but lower fraction of high-angle grain boundaries in the torsion specimen was suggested to be attributed to the characteristics of monotonic torsion (or simple shear) deformation including the way of strain evaluation.
引用
收藏
页码:403 / 408
页数:6
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