Tensile mechanical behavior of as-cast AA7050 alloy in the super-solidus temperature range
Aluminum 7050 alloy is one of the primary alloys for the aviation industry owing to its excellent mechanical properties. However, this alloy has several poor physical properties that affect its solidification, such as relatively low thermal conductivity and large solidification range. These properties tend to increase the hot tearing susceptibility of the alloy, which makes it difficult to produce by direct-chill (DC) casting. Accurate knowledge of the mechanical behavior of the alloy during solidification is therefore crucial to ensure safe control of the casting process. Present work focuses on measuring the tensile mechanical properties of an as-cast AA7050 in the temperature range where hot tearing mainly occurs, i.e. from solid fractions of 0.85 to 1.0, or the solidus. Through these experiments, we extracted mechanical properties such as strain-rate sensitivity and ductility of the alloy in the super-solidus temperature range. The data obtained from this work will be useful in thermo-mechanical computer simulations aimed at reducing the hot tearing occurrence during DC casting, thus optimizing the production rate in the casting house.
AA7050 DC Casting solidification hot tearing tensile mechanical properties
T Subroto A Miroux D G Eskin K Ellingsen A Marson M MHamdi Katgerman
Materials innovation institute (M2i),Mekelweg 2,Delft,2628 CD,The Netherlands;Dept.of Mat.Sci.and En BCAST,Brunel University,Uxbridge,Middlesex,UB8 3PH,United Kingdom SINTEF Materials and Chemistry,NO-0314 Oslo,Norway SINTEF Materials and Chemistry,NO-7465 Trondheim,Norway Dept.of Mat.Sci.and Engineering,Delft University of Technology,Mekelweg 2,Delft,2628 CD,The Netherla
国际会议
北京
英文
1-9
2013-06-16（万方平台首次上网日期，不代表论文的发表时间）