|About this Abstract
||2012 TMS Annual Meeting & Exhibition
||Magnesium Technology 2012
||Age Hardening Behavior of Mg-1.2Sn-1.7Zn Alloy Containing Al
||Taisuke Sasaki, Tadakatsu Ohkubo, Kazuhiro Hono
|On-Site Speaker (Planned)
Mg-Sn is a promising heat resistant precipitation hardenable system because of the higher melting temperature of the Mg<SUB>2</SUB>Sn phase. Recent investigations also reported excellent extrudability of the alloy. However, previously studied Mg-Sn alloys require high solution treatment temperature above 500<SUP>o</SUP>C because of the high solidus temperature for the Mg-2.2Sn base composition. In this work, we have investigated the age hardening behavior of Mg-1.2at.%Sn based alloys to reduce the solution treatment temperature. To enhance the age hardening response with the reduced Sn content, Zn and Al were alloyed. Mg-1.7Zn-1.2Sn-2.0Al alloy showed the peak hardness of 79 VHN at 200<SUP>o</SUP>C. The peak aged Mg-1.2Sn-1.7Zn-2.0Al alloy consisted of cuboidal β<SUB>1</SUB>’ precipitates with the size of less than 50 nm, and fine lath shaped Mg<SUB>2</SUB>Sn phase while Mg-1.2Sn-1.7Zn alloy was mainly strengthened by coarse rod shaped β<SUB>1</SUB>’ phase with over 500 nm in length.
||Definite: A combination print-CD volume