Next Article in Journal
A Broad Literature Review of Density Measurements of Liquid Cast Iron
Previous Article in Journal
Economic and Qualitative Determinants of the World Steel Production
Article Menu
Issue 5 (May) cover image

Export Article

Open AccessArticle
Metals 2017, 7(5), 164; doi:10.3390/met7050164

The Microstructure and Mechanical Properties of Die-Cast Mg-6Al-2Sm-xCu Alloys

Key Laboratory of Automobile Materials (Ministry of Education), College of Materials Science and Engineering, Jilin University, Changchun 130022, China
*
Author to whom correspondence should be addressed.
Academic Editor: Daolun Chen
Received: 8 March 2017 / Revised: 4 May 2017 / Accepted: 5 May 2017 / Published: 10 May 2017
View Full-Text   |   Download PDF [32490 KB, uploaded 10 May 2017]   |  

Abstract

In the present study, the effect of Cu content on the microstructure and mechanical properties of die-cast Mg-6Al-2Sm-xCu (x = 1, 3, 5) alloys has been investigated. The microstructure and components of the alloys were observed and identified by optical microscopy (OM), scanning electron microscopy (SEM), transmission electron microscopy (TEM), and energy dispersive spectroscopy (EDS), respectively. The phases of the alloys were analyzed via X-ray diffractometer (XRD). The mechanical properties at different temperatures were studied by tensile tests. The experimental results show that all die-cast Mg-6Al-2Sm-xCu alloys consist of α-Mg, β-Mg17Al12, Al4Cu9, Al3Sm, and Mg2Cu6Al5 phases. These components, i.e., Al3Sm and Al4Cu9 phases, have high thermal stability and can prohibit dislocation movement and grain boundary sliding. TEM analysis shows that the Al3Sm phase possesses a tetragonal structure. With the increase in Cu content, the microstructure is refined firstly and then becomes coarsened. Moreover, the tensile strength increases firstly and then decreases as Cu content increases at room temperature and an elevated temperature. All fractures of the alloys at room temperature show a complex mode of brittle and ductile fracture. However, at an elevated testing temperature, the fractures of the alloys exhibit more ductile fractures. View Full-Text
Keywords: Cu content; microstructure; mechanical properties; die-cast Mg-6Al-2Sm-xCu alloys Cu content; microstructure; mechanical properties; die-cast Mg-6Al-2Sm-xCu alloys
Figures

Figure 1

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Liu, J.; Yang, C.; Yang, M. The Microstructure and Mechanical Properties of Die-Cast Mg-6Al-2Sm-xCu Alloys. Metals 2017, 7, 164.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Metals EISSN 2075-4701 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top