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Microstructure and mechanical behavior of Mg–Y–Zn alloys with respect to varying content of LPSO phase

  • Yan-ping Guo , Ya-ning Wang , Min-gang Zhang , Yue-zhong Zhang , Da-qing Fang , Ying-hui Wei and Bao-sheng Liu
Published/Copyright: October 3, 2018
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 109 Issue 10

Abstract

Mg–Y–Zn alloys with different contents of alloying elements were prepared. The microstructure and mechanical properties of these Mg–Y–Zn alloys were investigated by using scanning electron microscopy, X-ray diffraction and tensile testing. The results show that the as-cast Mg–Y–Zn alloy is mainly composed of α-Mg, Mg12YZn and Mg3Y2Zn3 phases. After Mn addition, a small quantity of Mn phase arises in the as-cast Mg–Y–Zn–Mn alloy. After extrusion, the microstructure of the alloys is of an inhomogeneous character showing fine grains produced due to dynamic recrystallization. Tensile strength of as-extruded Mg-9Y-1Zn, Mg-9Y-3Zn and Mg-9Y-3Zn-1Mn reached 249.86 MPa, 303.19 MPa and 322.15 MPa, respectively. The gradually increasing strength can be attributed to fine grain strengthening, second phase strengthening and LPSO structure. Additionally, the tensile fracture surfaces were examined under scanning electron microscopy, and all of their fracture morphologies exhibit dimple facture character.

Keywords: Mg–Y–Zn alloy; LPSO phase; Microstructure; Mechanical properties; Fracture morphology
*Correspondence address, Professor Bao-sheng Liu, School of Materials Science and Engineering, Taiyuan University of Science and Technology, Taiyuan, 030024, P.R. China, Tel.: +86-351-2161126, Fax: +86-351-2161126, E-mail:

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Received: 2018-01-31
Accepted: 2018-04-25
Published Online: 2018-10-03
Published in Print: 2018-10-16

© 2018, Carl Hanser Verlag, München

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https://doi.org/10.3139/146.111692
Keywords for this article
Mg–Y–Zn alloy; LPSO phase; Microstructure; Mechanical properties; Fracture morphology

Articles in the same Issue

  1. Contents
  2. Contents
  3. Original Contributions
  4. Statistical analysis of micropore size distributions in Al–Si castings evaluated by X-ray computed tomography
  5. Effect of processing parameters on the microstructural and mechanical properties of aluminum–carbon nanotube composites produced by spark plasma sintering
  6. Synthesis of ZnO nanomaterials with different morphologies by hydrothermal method
  7. Dielectric studies of CCTO-based nanocomposite ceramic synthesized by a solid state route
  8. Effect of laser forming on mechanical properties of multiple-phase steels by using a thermal–microstructure–mechanical model
  9. Effect of temper rolling and subsequent annealing on texture development and magnetic permeability of semi-processed electrical steel with 2.3 wt.% Si
  10. Compressive behavior of double-layered functionally graded 316L stainless steel foam
  11. Microstructure and mechanical behavior of Mg–Y–Zn alloys with respect to varying content of LPSO phase
  12. Microstructural evolution of semi-solid A356 alloy during reheating
  13. Lewis–Br⊘nsted induction acidity in SBA-15 modified with Zr and P
  14. Short Communications
  15. Nanophase formation during the heat treatment of Al-13Si-5Cu-2Ni-1Mg alloy and the abnormal enhancement of its tensile properties
  16. Effect of minor Nd substitution for Y on microstructure and corrosion resistance of extruded Mg–Zn–Y alloy
  17. DGM News
  18. DGM News
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