J Mater Sci Technol ›› 2009, Vol. 25 ›› Issue (03): 365-369.

• Research Articles • Previous Articles     Next Articles

Textural Evolution of AZ31B Magnesium Alloy Sheets Undergoing Repeated Unidirectional Bending at Room Temperature

Guangsheng Huang,Wei Xu, , ,   

  1. 1) National Engineering Research Center for Magnesium Alloys, Chongqing University, Chongqing 400044, China
    2) College of Materials Science and Engineering, Chongqing University, Chongqing 400045, China
    3) CISDI Engineering Co., Ltd, Chongqing 400013, China
  • Received:2008-07-03 Revised:2008-09-27 Online:2009-05-28 Published:2009-10-10
  • Contact: Guangsheng Huang
  • Supported by:

    the National Natural Science Foundation of China under Grant No. 50504019
    Natural Science Foundation Project of CQ CSTC under Grant No. 2008BB4040.

Abstract:

Magnesium alloy sheets have poor plasticity and formability due to their strong (0002) basal textural component. In this paper, a new method, repeated unidirectional bending (RUB), was applied to improve the texture of AZ31B magnesium alloy sheets so as to enhance their stamping properties. The samples undergoing RUB were annealed at different temperatures. The mechanical properties, formability, textural components and microstructure of the samples before and after RUB were characterized and compared. It was found that the basal textural component was reduced dramatically by RUB and some other textural components appeared. The formability of the sheets was greatly enhanced after RUB, after which their percentage elongation and Erichsen value were considerably increased. The relationship between the improvement of the formability of the AZ31B magnesium alloy sheets and their textural evolution is discussed.

Key words: Magnesium Alloy Sheets, Unidirectional bending, Basal texture, Formability