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Effect of heat treatment parameters on microstructure, defects, and properties of Al-16Si-6Cu automotive shift fork: quantitative evaluation perspective

Farahany, S ; Sharif University of Technology | 2022

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  1. Type of Document: Article
  2. DOI: 10.1080/13640461.2022.2082758
  3. Publisher: Taylor and Francis Ltd , 2022
  4. Abstract:
  5. The current study investigated the effect of heat treatment parameters, including solution treatment temperature (STT), time, and quench rate, on the microstructure, defects, and hardness of an Al-16Si-6Cu Shift fork die-cast alloy. The changes in primary silicon particle (PSP) features were examined quantitatively by optical microscopy, coupled with image analysis and SEM equipped with EDS. The biggest PSPs (27 ± 8 µm) and the highest area fraction (23%) were found in the sample solution treated at 470°C and cooled in the furnace. The hardness value increased in heat-treated samples slightly (140–148 BHN). A lower STT (420°C) and a lower ageing time (1 h) are suitable conditions for the heat treatment of an Al-16Si-6Cu die-cast alloy, in which a lower pore area fraction, 1.18, smaller pore, 4.5 μm, along with finer primary silicon, 9.5 ± 3 μm, with higher circularity, 0.38 ± 0.04, was achieved. © 2022 Informa UK Limited, trading as Taylor & Francis Group
  6. Keywords:
  7. Al-Si-Cu-Mg alloy ; Defect ; Die-casting ; Aluminum alloys ; Copper alloys ; Defects ; Die casting ; Hardness ; Heat treatment ; Magnesium alloys ; Microstructure ; Area fraction ; Die-cast alloys ; Effect of heat treatments ; Heat treatment parameters ; Microstructure defects ; Primary Si ; Primary si particle ; Primary silicon ; Si-particle ; Solution treatment temperatures ; Silicon alloys
  8. Source: International Journal of Cast Metals Research ; Volume 35, Issue 1-3 , 2022 , Pages 60-72 ; 13640461 (ISSN)
  9. URL: https://www.tandfonline.com/doi/abs/10.1080/13640461.2022.2082758