Microstructure and mechanical properties of Mg-6Sn and Mg-6Zn alloys prepared by different processing techniques: a comparative study
Date
2016
Journal Title
Journal ISSN
Volume Title
Type
Article
Publisher
WILEY-V C H VERLAG GMBH,
Series Info
MATERIALWISSENSCHAFT UND WERKSTOFFTECHNIK;Volume: 47 Issue: 1 Pages: 37-46
Scientific Journal Rankings
Abstract
The microstructure and mechanical properties of Mg-6Sn and Mg-6Zn are investigated and compared in cast/heat treated, rolled and extruded conditions. Compared to the heat treated alloys, the grain size of both alloys decreases while the volume fraction of precipitates increases by rolling and extrusion in Mg-6Sn alloy at 350 degrees C due to dynamic recrystallization and dynamic precipitation of intermetallic phases. Zinc has a stronger grain refining effect than tin in the heat treated alloys while the opposite effect is found in the rolled and extruded alloys.
For the heat treated alloys the Mg-6Sn the strength reached 158.7 MPa with elongation 5.2% while Mg-6Zn exhibited a higher strength of 183.7 MPa and 8.4% elongation. In rolled condition the strength of Mg-6Sn reached 224 MPa with 1.6% elongation while Mg-6Zn exhibited a lower strength of 124 MPa and a lower ductility of 0.5% elongation due to susceptibility to hot shortness. Extrusion of Mg-6Sn alloy resulted in the maximum attained strength of 281 MPa and an elongation of 6.1% while Mg-6Zn cracked during extrusion due to hot shortness. The results obtained are discussed with respect to microstructure evolution in both alloys.
Description
Accession Number: WOS:000372051100005
Keywords
University of Magnesium alloys, Microstructure, Mechanical properties, Heat treatment
Citation
Cited References in Web of Science Core Collection: 24