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Comparative study on laser welding and TIG welding of semi-solid high pressure die cast A356 aluminium alloy

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dc.contributor.author Govender, G
dc.contributor.author Ivanchev, L
dc.contributor.author Hope, D
dc.contributor.author Burger, H
dc.contributor.author Kunene, G
dc.date.accessioned 2007-07-03T09:05:15Z
dc.date.available 2007-07-03T09:05:15Z
dc.date.issued 2007-07
dc.identifier.citation Govender, G et al. 2007. Comparative study on laser welding and TIG welding of semi-solid high pressure die cast A356 aluminium alloy. 5th Decennial International Conference on Solidification Processing Organiser: University of Sheffield, England, UK, 23-25 July 2007, pp 1-7 en
dc.identifier.uri http://hdl.handle.net/10204/863
dc.description.abstract Aluminium alloys are used extensively in the automotive and aerospace industries. The development semi-solid forming as manufacturing process has offered the opportunity to HPDC cast complex, near net shape, high volume, and high integrity components. The low porosity levels in SSM high pressure die castings (HPDC) improves the weldability of these components. The aim of the current research was to perform a comparative study of laser and TIG welding of SSM HPDC aluminium alloy A356. SSM slurries were prepared using the CSIR Rheocasting System and plates of 4mm × 80mm × 100mm were HPDC. Plates in as cast (F), T4 and T6 heat treated conditions were butt welded using an Nd: YAG laser and constant current AC TIG welding. The microstructure and micro-Vickers hardness (MVH) properties of the welds were investigated. It was found that the laser welding processes yielded a finer dendritic fusion zone and a much smaller heat affected zone (HAZ) compared to the TIG welds. The HAZ for both the laser and TIG welding was composed of mainly remelted eutectic and substructural changes that were picked up from the MVH profiles. The TIG welding process used was not well suited for eutectic alloys because of the lower energy density. This resulted in partial melting of the root, due to the longer period required for melting the eutectic structure. Collapse of the root and incomplete fusion was observed. The laser welding process was found to be more effective in welding A356 aluminium alloys because of the higher energy density of the process. en
dc.language.iso en en
dc.subject Aluminium alloys en
dc.subject Micro-vickers hardness en
dc.subject Laser welding en
dc.subject HPDC en
dc.subject High pressure die castings en
dc.title Comparative study on laser welding and TIG welding of semi-solid high pressure die cast A356 aluminium alloy en
dc.type Conference Presentation en
dc.identifier.apacitation Govender, G., Ivanchev, L., Hope, D., Burger, H., & Kunene, G. (2007). Comparative study on laser welding and TIG welding of semi-solid high pressure die cast A356 aluminium alloy. http://hdl.handle.net/10204/863 en_ZA
dc.identifier.chicagocitation Govender, G, L Ivanchev, D Hope, H Burger, and G Kunene. "Comparative study on laser welding and TIG welding of semi-solid high pressure die cast A356 aluminium alloy." (2007): http://hdl.handle.net/10204/863 en_ZA
dc.identifier.vancouvercitation Govender G, Ivanchev L, Hope D, Burger H, Kunene G, Comparative study on laser welding and TIG welding of semi-solid high pressure die cast A356 aluminium alloy; 2007. http://hdl.handle.net/10204/863 . en_ZA
dc.identifier.ris TY - Conference Presentation AU - Govender, G AU - Ivanchev, L AU - Hope, D AU - Burger, H AU - Kunene, G AB - Aluminium alloys are used extensively in the automotive and aerospace industries. The development semi-solid forming as manufacturing process has offered the opportunity to HPDC cast complex, near net shape, high volume, and high integrity components. The low porosity levels in SSM high pressure die castings (HPDC) improves the weldability of these components. The aim of the current research was to perform a comparative study of laser and TIG welding of SSM HPDC aluminium alloy A356. SSM slurries were prepared using the CSIR Rheocasting System and plates of 4mm × 80mm × 100mm were HPDC. Plates in as cast (F), T4 and T6 heat treated conditions were butt welded using an Nd: YAG laser and constant current AC TIG welding. The microstructure and micro-Vickers hardness (MVH) properties of the welds were investigated. It was found that the laser welding processes yielded a finer dendritic fusion zone and a much smaller heat affected zone (HAZ) compared to the TIG welds. The HAZ for both the laser and TIG welding was composed of mainly remelted eutectic and substructural changes that were picked up from the MVH profiles. The TIG welding process used was not well suited for eutectic alloys because of the lower energy density. This resulted in partial melting of the root, due to the longer period required for melting the eutectic structure. Collapse of the root and incomplete fusion was observed. The laser welding process was found to be more effective in welding A356 aluminium alloys because of the higher energy density of the process. DA - 2007-07 DB - ResearchSpace DP - CSIR KW - Aluminium alloys KW - Micro-vickers hardness KW - Laser welding KW - HPDC KW - High pressure die castings LK - https://researchspace.csir.co.za PY - 2007 T1 - Comparative study on laser welding and TIG welding of semi-solid high pressure die cast A356 aluminium alloy TI - Comparative study on laser welding and TIG welding of semi-solid high pressure die cast A356 aluminium alloy UR - http://hdl.handle.net/10204/863 ER - en_ZA


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