+Advanced Search
Effect of Heat Treatment on the Microstructure and Mechanical Properties of Mg-3.4Y-3.6Sm-2.6Zn-0.8Zr (wt%) Alloy
Author:
Affiliation:

Xi''an University of Architecture and Technology

Clc Number:

Fund Project:

  • Article
  • |
  • Figures
  • |
  • Metrics
  • |
  • Reference
  • |
  • Related
  • |
  • Cited by
  • |
  • Materials
  • |
  • Comments
    Abstract:

    The microstructure evolution and mechanical properties of Mg-3.4Y-3.6Sm-2.6Zn-0.8Zr alloy after different heat treatment experiments were investigated by differential thermal analysis (DSC), optical microscopy (OM), X-ray diffraction (XRD), scanning electron microscopy (SEM), energy dispersive spectroscopy (EDS) and tensile test, and the optimum heat treatment systems composing of solid-solution treatment at 500°C for 15 hours and aging treatment at 225°C for 40 hours were proposed. After the solution treatment at 500°C for 15 hours, the layer long period stacking ordered (LPSO) structure disappears, whereas (Mg,Zn)3(Y,Sm) at the grain boundary dissolves into a granular state from the reticular phase, and a large number of long strip phases Mg12(Y,Sm)Zn are formed at the same time. After the aging treatment, a large number of dispersed β′ phases precipitate into the α-Mg grains and it is beneficial to improve the yield strength of the experimental alloy. The yield strength (YS), ultimate tensile strength (UTS) and elongation (EL) of the experimental alloy are 170.0 MPa, 260.8 MPa and 14.1%, respectively. The fracture mode changes from intergranular to transgranular fracture after the heat treatment process.

    Reference
    Related
    Cited by
Get Citation

[Liu Minghua, Wang Wenli, Zhang Mengqi, Qiu Yulong. Effect of Heat Treatment on the Microstructure and Mechanical Properties of Mg-3.4Y-3.6Sm-2.6Zn-0.8Zr (wt%) Alloy[J]. Rare Metal Materials and Engineering,2019,48(7):2056~2061.]
DOI:10.12442/j. issn.1002-185X.20181223

Copy
Article Metrics
  • Abstract:
  • PDF:
  • HTML:
  • Cited by:
History
  • Received:December 06,2018
  • Revised:December 29,2018
  • Adopted:January 09,2019
  • Online: August 01,2019
  • Published: