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Effect of manganese on the microstructure and mechanical properties of magnesium alloys

  • Zhengwen Yu , Aitao Tang , Caiyu Li , Jianguo Liu and Fusheng Pan
Published/Copyright: October 23, 2019
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 110 Issue 11

Abstract

The influence of Mn on the microstructure and mechanical properties of as-cast and as-solution Mg–Mn alloys was investigated in the present work. X-ray diffraction patterns revealed that the dominant phases of the experimental alloys were the α-Mg matrix and Mn precipitates. The average grain sizes of the as-cast Mg–Mn alloys decreased monotonically with increasing Mn content, although Mn addition showed a negative grain refinement effect on the as-cast Mg alloys. Increasing the Mn content enhanced the tensile yield strength of the as-cast alloys from 17.6 to 35.1 MPa. The improved mechanical properties are mainly attributed to precipitation hardening; a large number of Mn precipitates were located within the matrix and along the grain boundaries. Meanwhile, the lower tensile strength and Vickers hardness of the as-solution alloys is explained by the coarsened microstructure and poor solid-solution strengthening behaviour.

Keywords: Mechanical properties; Mg–Mn alloys; Microstructure; Vickers hardness
∗Correspondence address, Professor Aitao Tang, College of Materials Science and Engineering, Chongqing University, Shazhengjie, Chongqing 400044, People's Republic of China, Tel.: +86-23-65106121, Fax: +86-23-65106121, E-mail: , Web: http://ccmg.cqu.edu.cn/info/1019/1124.htm
∗∗ Professor Jianguo Liu, Key Laboratory of Oral Disease Research, School of Stomatology, Zunyi Medical University, West Xuefu Road, Zunyi 563003, People's Republic of China, Tel: +86-851-28643466, Fax: +86-851-28643466, E-mail: , Web: http://www.zmu.edu.cn/info/1005/12507.htm

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Received: 2019-01-23
Accepted: 2019-06-28
Published Online: 2019-10-23
Published in Print: 2019-11-12

© 2019, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111843
Keywords for this article
Mechanical properties; Mg–Mn alloys; Microstructure; Vickers hardness

Articles in the same Issue

  1. Contents
  2. Contents
  3. Editorial
  4. Note from the Editor-in-Chief
  5. Original Contributions
  6. The softening factor cb of commercial titanium alloy wires
  7. A comparative assessment of cyclic deformation behavior of SA333 Gr-6 steel at ambient and elevated temperatures
  8. Effects of Ni and Al on the Cu-precipitation in ferritic Fe–Cu–M (M = Ni or Al) alloy
  9. Effect of manganese on the microstructure and mechanical properties of magnesium alloys
  10. Effect of heat treatment and extrusion on wear properties of AZ91-Pr alloy
  11. Effect of anodization treatment on the mechanical properties and fatigue behavior of AA2017-T4 aluminum alloy Al–Cu–Mg1
  12. Microstructural and tribological characterization of molybdenum–molybdenum carbide structures produced by spark plasma sintering
  13. Investigation of indentation and dry sliding wear behaviour of Al-12.6 wt.% Si-10 wt.% TiB2 composites produced by sequential milling and pressureless sintering
  14. Enthalpies of mixing in ternary Ce–Cu–Sb liquid alloys
  15. Effect of in-situ formation of AlP on solidification of hypereutectic Al–Si alloy
  16. Complex-shaped high speed steel with high mechanical performance fabricated by gelcasting sintering
  17. Internal electromagnetic stirring method for preparing a large-sized aluminum alloy billet
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