Effect of roll speed ratio on deformation characteristics of IF steel subjected to differential speed rolling

被引:21
作者
Ko, Y. G. [1 ]
Suharto, J. [1 ]
Lee, J. S. [1 ]
Park, B. H. [2 ]
Shin, D. H. [3 ]
机构
[1] Yeungnam Univ, Sch Mat Sci & Engn, Kyongsan 712749, South Korea
[2] POMIA, Convergence Prod Lab, Pohang 790784, South Korea
[3] Hanyang Univ, Dept Met & Mat Sci, Ansan 425791, South Korea
关键词
metals; severe plastic deformation; microstructure; image analysis; roll speed ratio; MECHANICAL-PROPERTIES; ALLOY SHEET; MG-3AL-1ZN ALLOY; TEXTURE; MICROSTRUCTURE; EVOLUTION; ALUMINUM; BEHAVIOR;
D O I
10.1007/s12540-013-3033-7
中图分类号
T [工业技术];
学科分类号
08 ;
摘要
The paper investigates the effect of the roll speed ratio on the deformation characteristics of interstitial free (IF) steel processed by the differential speed rolling (DSR) technique. An intense plastic strain induced by a single DSR with various roll speed ratios ranging from 1:1 to 1:4 for the lower and upper rolls was successfully imparted to the samples, resulting in the formation of fine elongated ferrite grains as the roll speed ratio increased. Observations of the preferred orientation using electron back-scattered diffraction and transmission electron microscopy revealed that the {110} slip was readily activated as the dominant deformation mode in order to accommodate the intense plastic strain imposed by the DSR. In addition, the microhardness values of the IF steel sample deformed via DSR under a roll speed ratio of 1:4 increased, and this is discussed on basis of the frictional force between the roll and the sample during DSR deformation.
引用
收藏
页码:603 / 609
页数:7
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