Precipitation Hardening Formation in Mg6Zn0.5Y Alloy as an Engine Block Application

Abstract:

Magnesium alloys have been widely applied in the automotive world cars or motorcycles and aircraft engines. This is because the weight of the magnesium itself is very lightweight and have high strength. And magnesium alloys have good thermal conductivity, high elastic modulus and good mechanical properties. Magnesium in engineering applications is usually in the mix with elements such as Al, Ag, Mn, Zn, Si, Zr and RE (rare element). Magnesium alloys with zinc are mostly found and used. This research has been carried out precipitation hardening treatment-Mg alloy-0.5Y 6Zn using variable temperature 150^oC, 175^oC and 200^oC with a holding time of 12 hours, 24 hours and 36 hours. The results show microstructure formed is αMg, MgZn, and Mg₃Zn₆Y (i-Phase). The formation of precipitates during the process of aging raise hardness values up to 75.8 BHN. Aging treatment reduces the thermal resistance of the alloy Mg-6Zn-0.5%Y.

• Periodical: Key Engineering Materials (Volume 739)
• Pages: 220-224
• DOI: https://doi.org/10.4028/www.scientific.net/KEM.739.220
• Online since: June 2017
• Authors: Agung Purniawan, Sutarsis Sutarsis, Tri Wicaksono Sigit*
• Keywords: Engine Block, Magnesium Alloys, Precipitation Hardening

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