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 language | English |
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Pages (from-to) | 304-310 |
Number of pages | 7 |
Journal | Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing |
Volume | 706 |
DOIs | |
Publication status | Published - 26 Oct 2017 |
Keywords
- Hall-Petch relation
- Magnesium alloys
- Recrystallization
- Rolling
- Sheet
- Work hardening
Equipment
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Centre for Electron Microscopy (MCEM)
Flame Sorrell (Manager) & Peter Miller (Manager)
Office of the Vice-Provost (Research and Research Infrastructure)Facility/equipment: Facility
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X-ray Platform (MXP)
Ji Sheng Ma (Manager)
Materials Science & EngineeringFacility/equipment: Facility