| Title |
Extrudability and Tensile Properties of the Mg-7Sn-1Al-1Zn Alloy |
| Authors |
박성혁(Sung Hyuk Park); 김하식(Ha Sik Kim); 유봉선(Bong Sun You) |
| DOI |
https://doi.org/10.3365/KJMM.2013.51.9.637 |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Keywords |
metals; extrusion; mechanical properties; optical microscopy; extrudability |
| Abstract |
The extrudability and mechanical properties of the Mg-7Sn-1Al-1Zn (TAZ711) alloy were investigated by performing indirect extrusion at various temperatures and speeds and tensile tests and comparing the results with those of the Mg-8Al-0.5Zn (AZ80) alloy. When the AZ80 alloy was extruded at a high extrusion temperature of 450 ℃ or at extrusion temperatures above 350 ℃ with a high extrusion speed of 12 m/min, surface hot cracking occurred, while the TAZ711 alloy was successfully extruded without any surface defects at a high temperature of 450 ℃ with a high speed of 12 m/min. With an increasing extrusion temperature and speed, the average grain size of the extruded AZ80 and TAZ711 alloys increased and the yield and tensile strength decreased. The TAZ711 alloy had a higher yield strength and lower tensile strength and elongation than the AZ80 alloy extruded under the same conditions. |