Skip to main content
Journal cover image

Microstructure and creep behaviors of as-cast Mg-Zn-Er alloys

Publication ,  Conference
Li, RJ; Li, SB; Liu, K; Wang, ZH; Du, X; Du, WB
Published in: Materials Science Forum
January 1, 2017

The microstructure and creep behaviors of cast Mg-xZn-yEr (x=3,6,9 wt.%, x/y=6) alloys were investigated by X-ray diffraction (XRD), optical microscope (OM), scanning electron microscope (SEM) and transmission electron microscope (TEM). XRD results indicated that the main phase compositions of as-cast Mg-xZn-yEr alloys were the icosahedral quasicrystalline phase (I-phase) and α-Mg solid solution. The I-phase mainly distributed in the dendritic and staccato strips. The creep tests were conducted under the condition of 448 K, 70 MPa for 100 h. As the addition of Er increased from 0.5 wt.% to 1.5 wt.%, the total creep strain decreased from 0.962% to 0.512%, and the steady state creep rate decreased from 1.411×10-8s-1 to 4.917×10-9s-1. The I-phase had a tendency to be bulky and continuous, as the volume fraction of Er element increased. Ascribed to the I-phase, the creep strain happened and effectively blocked the movement of dislocations, resulting in the strengthened as-cast Mg-Zn-Er alloys and improved creep resistance. Based on the investigation of creep behaviors, the creep mechanism of the as-cast alloy was mainly grain boundary slipping.

Duke Scholars

Published In

Materials Science Forum

DOI

EISSN

1662-9752

ISSN

0255-5476

ISBN

9783035711516

Publication Date

January 1, 2017

Volume

898 MSF

Start / End Page

305 / 310

Related Subject Headings

  • Nanoscience & Nanotechnology
  • Materials
  • 4016 Materials engineering
  • 0912 Materials Engineering
  • 0306 Physical Chemistry (incl. Structural)
 

Citation

APA
Chicago
ICMJE
MLA
NLM
Li, R. J., Li, S. B., Liu, K., Wang, Z. H., Du, X., & Du, W. B. (2017). Microstructure and creep behaviors of as-cast Mg-Zn-Er alloys. In Materials Science Forum (Vol. 898 MSF, pp. 305–310). https://doi.org/10.4028/www.scientific.net/MSF.898.305
Li, R. J., S. B. Li, K. Liu, Z. H. Wang, X. Du, and W. B. Du. “Microstructure and creep behaviors of as-cast Mg-Zn-Er alloys.” In Materials Science Forum, 898 MSF:305–10, 2017. https://doi.org/10.4028/www.scientific.net/MSF.898.305.
Li RJ, Li SB, Liu K, Wang ZH, Du X, Du WB. Microstructure and creep behaviors of as-cast Mg-Zn-Er alloys. In: Materials Science Forum. 2017. p. 305–10.
Li, R. J., et al. “Microstructure and creep behaviors of as-cast Mg-Zn-Er alloys.” Materials Science Forum, vol. 898 MSF, 2017, pp. 305–10. Scopus, doi:10.4028/www.scientific.net/MSF.898.305.
Li RJ, Li SB, Liu K, Wang ZH, Du X, Du WB. Microstructure and creep behaviors of as-cast Mg-Zn-Er alloys. Materials Science Forum. 2017. p. 305–310.
Journal cover image

Published In

Materials Science Forum

DOI

EISSN

1662-9752

ISSN

0255-5476

ISBN

9783035711516

Publication Date

January 1, 2017

Volume

898 MSF

Start / End Page

305 / 310

Related Subject Headings

  • Nanoscience & Nanotechnology
  • Materials
  • 4016 Materials engineering
  • 0912 Materials Engineering
  • 0306 Physical Chemistry (incl. Structural)