The heat treatment cycles that are currently applied to semi-solid processed components are mostly those that are in use for dendritic casting alloys. These heat treatments are not necessarily the optimum treatments for non-dendritic microstructures. For rheocast alloy A356, it is shown that natural aging prior to artificial aging causes the time-to-peak-hardness to be longer compared to the time when only artificial aging is used. Furthermore, a hardness plateau is maintained during artificial aging at 180oC between 1 and 5 hours without any prior natural aging. A natural aging period as short as 1 hour results in a hardness peak (rather than a plateau) to be reached during artificial aging after 4 hours at 180oC
Reference:
Moller, H, Govender, G and Stumpf, WE. 2008. Natural and artificial aging response of semi-solid metal processed alloy A356. 10th International Conference on Semi-Solid processing of alloys and composites (S2P). Aachen, Germany and Liege, Belgium, 16 - 18 September 2008. Solid State Phenomena, Vols. 141-143 (2008), pp 737-742
Möller, H., Govender, G., & Stumpf, W. (2008). Natural and artificial aging response of semi-solid metal processed alloy A356. Trans Tech Publications. http://hdl.handle.net/10204/3251
Möller, H, G Govender, and WE Stumpf. "Natural and artificial aging response of semi-solid metal processed alloy A356." (2008): http://hdl.handle.net/10204/3251
Möller H, Govender G, Stumpf W, Natural and artificial aging response of semi-solid metal processed alloy A356; Trans Tech Publications; 2008. http://hdl.handle.net/10204/3251 .
10th International Conference on Semi-Solid processing of alloys and composites (S2P). Aachen, Germany and Liege, Belgium, 16 - 18 September 2008.
Copyright: 2008 Trans Tech Publications
