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| Microtexture Evolution and Grain Boundary Character Distribution of Interstitial-Free Steels With Moderate Levels of Cold Rolling Reductions |
| YANG Jing-jing,FAN Li-xia,JIA Juan,WU Run,SONG Xin-li,JIANG Li-li |
| School of Materials and Metallurgy, Wuhan University of Science and Technology, Wuhan 430081, Hubei, China |
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Abstract High-strength interstitial-free steel sheets have very good deep drawability when processed to have {111} recrystallization texture. The microtexture evolution and grain boundary character distribution of interstitial-free steels as a function of moderate levels of cold rolling reductions were investigated by the metallographic microscopy and electron backscatter diffraction technique. The results showed that there was a close relationship between microtexture and grain boundary character distribution for interstitial-free steel, especially the distribution and features of some specific types of coincident-site lattice boundaries. In addition, ��-fiber texture was weakened to vanish while ��-fiber texture strengthened gradually as cold rolling reduction was increased from 20% to 75% for cold rolled and annealed samples. Accordingly, increasing the rolling reduction from 20% to 75% would lead to a significant increase in the proportion of ��3 boundaries. Also, it was found that the microtexture of 20% cold rolled sample would induce a high frequency of ��11 grain boundaries, but the microtexture of 75% cold rolled sample would produce more ��7 and ��17 grain boundaries. It was suggested that texture played a significant role in the formation of grain boundary character distribution.
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Received: 16 July 2012
Published: 17 December 2013
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Corresponding Authors:
xia LiFan
E-mail: flxybsy@163.com
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2013, Vol. 20 
