Chauke, LDaswa, PMöller, HGovender, S2015-09-102015-09-102015-07Chauke, L, Daswa, P, Möller, H and Govender, S. 2015. The effect of natural pre-ageing on the mechanical properties of Rheo-High pressure die cast aluminium alloy 2139. In: Seventh International Light Metals Technology Conference (LMT 2015), Port Elizabet, South Africa, July 27-29http://www.scientific.net/MSF.828-829.244http://hdl.handle.net/10204/8134Seventh International Light Metals Technology Conference (LMT 2015), Port Elizabet, South Africa, July 27-29. Due to copyright restrictions, the attached PDF file only contains the abstract of the full text item. For access to the full text item, please consult the publisher's websiteNear-net shape casting of wrought aluminium alloys has proven to be difficult due to hot tearing. The Council for Scientific and Industrial Research (CSIR) has successfully processed wrought aluminium alloy 2139 into plate castings using the Rheo-high pressure die casting process (R-HPDC). Alloy 2139 is a Ag-containing aluminium alloy from the Al-Cu-Mg 2xxx series family. The addition of Ag enhances the age hardening response through the formation of co-clusters that act as precursors to the formation of plate-like O precipitates. These co-clusters typically form during natural ageing and 12-24 h of natural pre-ageing is normally specified before artificial ageing in Ag-containing Al-Cu-Mg alloys. The T6 hardness and tensile properties of R-HPDC 2139 alloy were investigated with and without natural pre-ageing. It is shown that there is no significant difference in both peak hardness and tensile properties in R-HPDC alloy 2139 with and without natural pre-ageing. The possible precipitation phenomena in both cases are discussed.enWrought aluminiumSemi-solid metalNatural pre-ageingMechanical propertiesR-HPDC 2139 alloyConference PresentationChauke, L., Daswa, P., Möller, H., & Govender, S. (2015). The effect of natural pre-ageing on the mechanical properties of Rheo-High pressure die cast aluminium alloy 2139. Trans Tech Publications. http://hdl.handle.net/10204/8134Chauke, L, P Daswa, H Möller, and S Govender. "The effect of natural pre-ageing on the mechanical properties of Rheo-High pressure die cast aluminium alloy 2139." (2015): http://hdl.handle.net/10204/8134Chauke L, Daswa P, Möller H, Govender S, The effect of natural pre-ageing on the mechanical properties of Rheo-High pressure die cast aluminium alloy 2139; Trans Tech Publications; 2015. http://hdl.handle.net/10204/8134 .TY - Conference Presentation AU - Chauke, L AU - Daswa, P AU - Möller, H AU - Govender, S AB - Near-net shape casting of wrought aluminium alloys has proven to be difficult due to hot tearing. The Council for Scientific and Industrial Research (CSIR) has successfully processed wrought aluminium alloy 2139 into plate castings using the Rheo-high pressure die casting process (R-HPDC). Alloy 2139 is a Ag-containing aluminium alloy from the Al-Cu-Mg 2xxx series family. The addition of Ag enhances the age hardening response through the formation of co-clusters that act as precursors to the formation of plate-like O precipitates. These co-clusters typically form during natural ageing and 12-24 h of natural pre-ageing is normally specified before artificial ageing in Ag-containing Al-Cu-Mg alloys. The T6 hardness and tensile properties of R-HPDC 2139 alloy were investigated with and without natural pre-ageing. It is shown that there is no significant difference in both peak hardness and tensile properties in R-HPDC alloy 2139 with and without natural pre-ageing. The possible precipitation phenomena in both cases are discussed. DA - 2015-07 DB - ResearchSpace DP - CSIR KW - Wrought aluminium KW - Semi-solid metal KW - Natural pre-ageing KW - Mechanical properties KW - R-HPDC 2139 alloy LK - https://researchspace.csir.co.za PY - 2015 T1 - The effect of natural pre-ageing on the mechanical properties of Rheo-High pressure die cast aluminium alloy 2139 TI - The effect of natural pre-ageing on the mechanical properties of Rheo-High pressure die cast aluminium alloy 2139 UR - http://hdl.handle.net/10204/8134 ER -