Heat treatment Effect of Mg-5Sn-3Zn-1Mn Alloy with different Silicon addition

The Mg-5Sn-3Zn-1Mn alloy with varying silicon addition samples were casted as per the calculated weight percentage. The present work is to study and understand the solution heat treatment and ageing of Mg-5Sn-3Zn-1Mn-xSi alloys. The heat treatment procedure was framed for the duration of 18 h and 480ºC as per the trial and error method. After the solution heat treatment, ageing was done at 450ºC and 6 h for all the prepeared samples. The characterization tests were conducted on the samples to analyse the metallurgical changes and their results were discussed. The intermetallic formed was identified by using SEM–EDS. The modification of Mg₂Si intermetallic and refinement was observed for both the eutectic and primary phases. Similarly the hardness and tensile tests were conducted to reveal the mechanical properties. After the heat treatment process, and compare with the untreated. The effect of formed precipitate Mg₂Sn, Mg₂Si were correlated with the improved tensile strength of the alloys.