4.6 Article

Enhanced mechanical properties of Mg-3Al-1Zn alloy sheets through slope extrusion

Journal

Publisher

SPRINGER
DOI: 10.1007/s12613-021-2370-7

Keywords

AZ31 Mg alloy sheets; slope extrusion; microstructure; texture; strength

Funding

  1. National Natural Science Foundation of China [U1764253, 51971044, 51901204, U1910213 52001037, U207601]
  2. National Defense Basic Scientific Research Program of China
  3. Chongqing Science and Technology Commission, China [cstc2017zdcy-zdzxX0006]
  4. Chongqing Municipal Education Commission, China [KJZDK202001502]
  5. Chongqing Scientific & Technological Talents Program, China [KJXX2017002]
  6. Qinghai Scientific & Technological Program, China [2018-GX-A1]
  7. Zhejiang Provincial Natural Science Foundation, China [LGG21E050009]
  8. Research Start-up Funds of Shaoxing University, China [20210007]

Ask authors/readers for more resources

A novel slope extrusion (SE) approach was used to manufacture AZ31 alloy sheets, and its microstructures, textures, and mechanical properties were compared with those of conventional extrusion (CE). The results showed that SE process achieved significant grain refinement and texture strengthening, leading to improved mechanical properties of the SE sheets compared to the CE sheets.
A novel extrusion approach, entitled slope extrusion (SE), was employed to manufacture AZ31 (Mg-3Al-1Zn, wt%) alloy sheets. The microstructures, textures, and mechanical properties were investigated, compared with those of the AZ31 sheet fabricated by conventional extrusion (CE). Through the combination of finite element simulation and actual experiment, the ultimate results indicated that significant grain refinement (from 9.1 to 7.7 and 5.6 mu m) and strong basal texture (from 12.6 to 17.6 and 19.5 mrd) were achieved by the SE process. The essence was associated with the additional introduced inclined interface in the process of SE, which could bring about more asymmetric deformation and stronger accumulated strain along the ND when compared with the process of CE. As a consequence, the SE sheets exhibited a higher yield strength (YS) and ultimate tensile strength (UTS) than the counterparts of the CE sheet, which was mainly assigned to the synergistic effects from grain refining and texture strengthening.

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