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THE TEXTURE EVOLUTION AT THE CENTER OF PEARLITIC STEEL WIRE DURING DRAWING AND ITS INFLUENCE ON THE MECHANICAL PROPERTIES |
ZHAO Tianzhang1, SONG Hongwu1, ZHANG Guangliang2, CHENG Ming1, ZHANG Shihong1() |
1 Institute of Metal Research, Chinese Academy of Sciences, Shenyang 110016 2 Taizhou University, Taizhou 318000 |
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Cite this article:
ZHAO Tianzhang, SONG Hongwu, ZHANG Guangliang, CHENG Ming, ZHANG Shihong. THE TEXTURE EVOLUTION AT THE CENTER OF PEARLITIC STEEL WIRE DURING DRAWING AND ITS INFLUENCE ON THE MECHANICAL PROPERTIES. Acta Metall Sin, 2014, 50(6): 667-673.
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Abstract The cold drawing pearlitic steel wires are widely used in industry such as the automobile tire and ropes. And it possesses an ultra high strength, almost the highest in all the steel products. So many investigations are focused on the hardening mechanisms of pearlitic steel wire during cold drawing, including the microstructure fining, texture evolution and cementite dissolution. In this study, the electron backscatter diffraction (EBSD) and the visco-plastic self-consistent (VPSC) model are used to investigate the texture evolution law at the center of wire during the drawing, as well as its influences on the mechanical behaviors. The EBSD results show that the as-received wires after dry drawing and quenching have a little <110> fiber texture along the drawing direction. And with wet drawing strain increasing, the intense of <110> fiber texture increases apparently. The calculations using VPSC have a good agreement with the EBSD results, which indicate that VPSC can successfully predict the texture category and its evolution law in pearlitic steel wire during drawing. The predictions show that the <110> fiber texture is gradually generated at the center of wire with strain increasing and exhibit the path of individual orientation in the inverse pole figures during the drawing. The orientations at the line linking <113> and <012> seem stable. The orientations located at the line linking <001> and <111> prefer to turn to the stable orientations and then turn to <110>. The other orientations turn to <110> directly. The volume of <110> orientations within 15 degrees of drawing direction increases with strain increasing and get saturation finally. The tensile yield stress of the wire center increases with the initial volume of <110> fiber texture increasing.
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Received: 09 December 2013
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Fund: Supported by NV Bekaert SA (Belgium), National Natural Science Foundation of China (No.51034009) and Strategic Cooperation Project between Guangdong Province and Chinese Academy of Sciences (No.2012B091100251) |
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