Microstructure and tensile properties of Mg-3Al-1Zn sheets produced by hot-roller-cold-material rolling

D. Liu, M. Z. Bian, S. M. Zhu, W. Z. Chen, Z. Y. Liu, E. D. Wang, J. F. Nie

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7 Citations (Scopus)

Abstract

Mg-3Al-1Zn (AZ31) alloy sheets with various thickness reductions from 10% to 60% were fabricated in a single pass at 150 °C by hot-roller-cold-material rolling. The rolled sheets were then evaluated by microstructural characterization and tensile testing. The strength shows an increase with increasing thickness reduction from 10% to 40%, but the further increase in thickness reduction leads to a decrease in strength. Yield strengths of 273 MPa along the rolling direction and 357 MPa along the transverse direction are obtained for the sheet with 40% thickness reduction, which is characterized by highly elongated grains and high density dislocations, together with a few ultrafine, recrystallized grains in microstructure. The variation in strength with thickness reduction is discussed in light of the strengthening contributions from grain size and dislocation density.

Original languageEnglish
Pages (from-to)304-310
Number of pages7
JournalMaterials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing
Volume706
DOIs
Publication statusPublished - 26 Oct 2017

Keywords

  • Hall-Petch relation
  • Magnesium alloys
  • Recrystallization
  • Rolling
  • Sheet
  • Work hardening

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