Influence of Ni and Sr addition on Tensile Behavior and Microstructural Constituents of Squeeze Cast Aluminum Alloy A380
For further expansion of aluminum usage to the area where heavy dynamic loading is required in vehicles, improvement on as-cast properties of aluminum alloys and their corresponding manufacturing processes become essential.In this study, aluminum alloy A380 was modified and alloyed with the addition of nickel and strontium.Squeeze casting which provides excellent formability, close dimensional tolerance and high productivity was employed to cast both the modified and unmodified A380 under an applied pressure of 90MPa.Tensile properties and microstructure of the modified A380 alloy were compared with those of the unmodified alloy in as-cast condition.The result of tensile testing indicated that the modified A380 alloy exhibited a significantly improvement on tensile properties, specifically ultimate tensile strength (UTS: 241.6 MPa), yield strength (YS: 172.5 MPa) and resilience (200.3 KJ/m3).An optical microscope and a scanning electron microscope (SEM) have been used to analyze the microstructure.Examination of the analyzed microstructures manifests the presence of Ni-containing intermetallic phases and the modified eutectic Si phase with refined morphologies due to the Ni and Sr addition.The considerable enhancement on the as-cast strengths of the squeeze cast Ni and Sr containing alloy over those of the conventional A380 alloy should be considered as a consequence of the microstructure modification.
aluminum alloy squeeze cast nickel strontium microstructure tensile behavior
Li FANG Xuezhi ZHANG Henry HU Xueyuan NIE Jimi TJONG
Department of Mechanical, Automotive & Materials Engineering, University of Windsor,401 Sunset Ave., Ford Powertrain Engineering Research & Development Centre, Windsor, Ontario, Canada N9A 6X3
国内会议
2016中国有色合金及特种铸造发展论坛(第3届有色合金及特种铸造技术国际研讨会、第十一届中国国际压铸会议、第九届中国铸造质量标准论坛)
上海
英文
15-25
2016-07-09（万方平台首次上网日期，不代表论文的发表时间）