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Evolution of microstructure and formability of AZ31 Mg alloy sheets processed by continuous bending with different accumulated strain
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1.Heavy Machinery Engineering Research Center of the Ministry of Education,Taiyuan University of Science and Technology;2.State Key Laboratory of Mechanical Transmission,College of Materials Science and Engineering,Chongqing University;3.College of Materials Science and Engineering,Taiyuan University of Technology

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    Abstract:

    AZ31 alloy sheets were subjected to continuous bending (CB) process with various accumulated strain in a single pass at room temperature, and followed by annealing treatment. The corresponding microstructure and mechanical properties of as-received and CB sheets were investigated in the present paper. The obtained results indicated that no twins were observed in all microstructures during CB process. Abnormal grain growth occurred in the surface part after annealing and the depth of coarse-grained layer increased with the accumulated strain increasing. Moreover, the CB sheets in annealing condition exhibited a RD-tilt basal texture, and the inclination angle increased with the accumulated strain increasing. Compared to the as-received sample with a strong basal texture, the CB processed samples exhibited better stretch formability (2.3mm vs. 4.9mm, increased by ~113%), due to smaller r-value and larger n-value, which was related to the texture evolution.

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[Tingzhuang Han, Guangsheng Huang, Lifei Wang, Bin Jiang, Guangang Wang, Aitao Tang, Fusheng Pan. Evolution of microstructure and formability of AZ31 Mg alloy sheets processed by continuous bending with different accumulated strain[J]. Rare Metal Materials and Engineering,2020,49(1):21~26.]
DOI:10.12442/j. issn.1002-185X. E20180019

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History
  • Received:July 11,2018
  • Revised:December 17,2019
  • Adopted:August 31,2018
  • Online: February 16,2020
  • Published: