TY - JOUR ID - 15065 TI - Development of new Al-Cu-Si alloys for high temperature performance JO - Advanced Materials Letters JA - AML LA - en SN - 0976-3961 AU - A. Awe, Samuel AU - Seifeddine, Salem AU - E. W. Jarfors, Anders AU - C. Lee, Young. AU - K. Dahle, Arne AD - Y1 - 2017 PY - 2017 VL - 8 IS - 6 SP - 695 EP - 701 KW - Eutectic composite structure KW - casting KW - solidification KW - elevated KW - temperature performance KW - thermo KW - calc KW - tensile properties DO - 10.5185/amlett.2017.1471 N2 - In a quest for developing new lightweight metal alloys that can perform excellently at elevated-temperatures (from 300°C to 400 °C), a ternary eutectic Al-Cu-Si alloy was exploited to gain a deeper understanding of the alloy system and its suitability for high temperature applications. The studied alloys, with chemical composition of Al-27%Cu-5%Si (by weight percent) with Ni addition in the range of 0 to 1.5%wt, were cast in a rapid solidification casting technique. The solidification characteristics of the alloy was studied using the Thermo-Calc software. Microstructures were characterized in a scanning electron microscope coupled with energy dispersive spectrometry (SEM-EDS). Finally, the elevated-temperature tensile properties of the alloys were investigated. Comparing the microstructures and mechanical properties of the Al-Cu-Si(-Ni) alloys with conventional A319 Al- alloy, the refined microstructure with dispersed Ni intermetallic particles formed in the as-cast Al-Cu-Si(-Ni) alloys delivers improved elevated temperature properties. In particular, the yield strength and ultimate tensile strength of the new alloy with 1.5% Ni at 400˚C were observed to be 220% and 309% higher, respectively, than for conventional A319 reference alloy. UR - https://aml.iaamonline.org/article_15065.html L1 - https://aml.iaamonline.org/article_15065_cef1d9310ee47cc9f9aa99c77a329d95.pdf ER -