Semi-solid casting of pure magnesium

Curle, Ulyate AWilkins, Jeremias D2023-03-172023-03-172019-01Curle, U.A. & Wilkins, J.D. 2019. Semi-solid casting of pure magnesium. Solid State Phenomena, 285. http://hdl.handle.net/10204/126721662-9779https://doi.org/10.4028/www.scientific.net/SSP.285.464http://hdl.handle.net/10204/12672Semi-solid processing works on the principal of a solidification temperature interval of a substance. The substance is heated to a temperature within this interval so that there exists a related solid-liquid fraction ratio. The substance with this phase structure is then shaped by a forging or casting process. It has been stated before that it is impossible to semi-solid process and cast pure metals or eutectic alloys due to their thermodynamic temperature invariance, meaning that there is no temperature interval. It was demonstrated recently that it is possible to semi-solid casting high purity aluminium (Curle UA, Möller H, Wilkins JD. Scripta Materialia 64 (2011) 479-482) and the Al-Si binary eutectic (Curle UA, Möller H, Wilkins JD. Materials Letters 65 (2011) 1469-1472). The working principal is that there exists a time interval during thermal arrest during which solidification takes place with a solid-liquid fraction ratio until all the liquid is consumed upon cooling. The aim with this work is to demonstrate that pure magnesium can also be rheo-high pressure die cast (R-HPDC) with the system developed at the CSIR in South Africa. Magnesium is notoriously difficult to cast due to the thermal properties of magnesium. The metal was poured into a cup, processed for about 6 seconds after which it was HPDC into a plate. The microstructure of the casting consists of a structure that was solid and a structure that was liquid during thermal arrest at the time of casting.AbstractenHigh pressure die castingMagnesiumRheo-processingR-HPDCSemi-solid processingSolidification time intervalSemi-solid casting of pure magnesiumArticleCurle, U. A., & Wilkins, J. D. (2019). Semi-solid casting of pure magnesium. Solid State Phenomena, 285, http://hdl.handle.net/10204/12672Curle, Ulyate A, and Jeremias D Wilkins "Semi-solid casting of pure magnesium." Solid State Phenomena, 285 (2019) http://hdl.handle.net/10204/12672Curle UA, Wilkins JD. Semi-solid casting of pure magnesium. Solid State Phenomena, 285. 2019; http://hdl.handle.net/10204/12672.TY - Article AU - Curle, Ulyate A AU - Wilkins, Jeremias D AB - Semi-solid processing works on the principal of a solidification temperature interval of a substance. The substance is heated to a temperature within this interval so that there exists a related solid-liquid fraction ratio. The substance with this phase structure is then shaped by a forging or casting process. It has been stated before that it is impossible to semi-solid process and cast pure metals or eutectic alloys due to their thermodynamic temperature invariance, meaning that there is no temperature interval. It was demonstrated recently that it is possible to semi-solid casting high purity aluminium (Curle UA, Möller H, Wilkins JD. Scripta Materialia 64 (2011) 479-482) and the Al-Si binary eutectic (Curle UA, Möller H, Wilkins JD. Materials Letters 65 (2011) 1469-1472). The working principal is that there exists a time interval during thermal arrest during which solidification takes place with a solid-liquid fraction ratio until all the liquid is consumed upon cooling. The aim with this work is to demonstrate that pure magnesium can also be rheo-high pressure die cast (R-HPDC) with the system developed at the CSIR in South Africa. Magnesium is notoriously difficult to cast due to the thermal properties of magnesium. The metal was poured into a cup, processed for about 6 seconds after which it was HPDC into a plate. The microstructure of the casting consists of a structure that was solid and a structure that was liquid during thermal arrest at the time of casting. DA - 2019-01 DB - ResearchSpace DP - CSIR J1 - Solid State Phenomena, 285 KW - High pressure die casting KW - Magnesium KW - Rheo-processing KW - R-HPDC KW - Semi-solid processing KW - Solidification time interval LK - https://researchspace.csir.co.za PY - 2019 SM - 1662-9779 T1 - Semi-solid casting of pure magnesium TI - Semi-solid casting of pure magnesium UR - http://hdl.handle.net/10204/12672 ER -22431