The Effect of Low Deformation Asymmetric Rolling on Microstructure and Texture of the Polycrystalline Copper

Archives of Metallurgy and Materials

A. Uniwersał¹  I. Kalemba-Rec¹  M. Wróbel¹  M. Wroński²  K. Wierzbanowski²  S. Wroński²  A. Baczmański²  B. Bacroix³ 

[1] AGH University of Science and Technology, Faculty of Metals Engineering and Industrial Computer Science, Al. Mickiewicza 30, 30-059 Kraków, Poland;AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Al. Mickiewicza 30, 30-059 Kraków, Poland;LSPM-CNRS Université Paris 13, 99 Av. J.B. Clement, 93 430 Villetaneuse, France

关键词: Keywords: Asymmetric rolling;    polycrystalline copper;    microstructure refinement;    strip curvature;   

DOI  :  10.1515/amm-2016-0348

学科分类：金属与冶金

来源: Akademia Gorniczo-Hutnicza im. Stanislawa Staszica / University of Mining and Metallurgy

【 摘 要 】

In the most recent years the asymmetric rolling (AR) attracts attention of researchers and technologists. This process can improve some technological parameters (e.g. modification of rolling torque and load, power requirements, etc.) as well as provide the possibility of grain refinement in a relatively inexpensive way. Most of the reports concerning microstructural changes produced by AR refer to high deformations imposed in highly asymmetric conditions. However, such rolling conditions are difficult to control, so there are no prospects to their quick industrial implementation. The present paper refers to relatively low deformation and low asymmetry rate, that is much more interesting for the industry. It was shown that bending of the rolled band (important disadvantage of the AR technology) can be controlled by adjusting of the amount of deformation and asymmetry. It was also shown that ca. 30% reduction in thickness during cold rolling, together with a relatively low asymmetry, reduces significantly the grain size and produces a more fragmented microstructure inside grains of the polycrystalline copper comparing to the symmetric rolling (SR). The material hardness after AR is higher than after the SR. Moreover, the crystallographic texture asymmetry, expressed by its rotation around the transverse direction, is observed in the AR material.

【 授权许可】

Unknown