Thermal Analysis as a Microstructure Prediction Tool for A356 Aluminium Parts Solidified under Various Cooling Conditions
(0) Thermal analysis performed with standard cups has been used since decades for melt control and microstructure prediction before casting aluminium alloys. However, obtAlning a proper microstructure in a standard cup does not ensure that the microstructure is correct in real parts which may solidify at very different cooling rates. For this study, alloy A356 with different metal quality in terms of modification and grAln refinement was tested. Different cooling rates were obtAlned by employing cylindrical test samples with various diameters cast in sand and metallic moulds. The correlation between microstructure features such as grAln size, modification rate and secondary dendrite arm spacing (SDAS) measured in the standard thermal analysis cup with those obtAlned in the cylindrical test parts has been investigated. Thus, knowing the thermal modulus and the mould type it is possible to establish the required grAln size and modification rate in the standard cup in order to get a desired structure in a real part. Corrective actions can then be taken in order to improve the metallurgical quality before casting the part.
A356 aluminium alloy solidification thermal analysis grAln size modification rate
A. Niklas A. I. Femandez-Calvo J. Lacaze R. Suarez
Engineering and Foundry Processes Department, AZTERLAN, Aliendalde Auzunea 6, E-48200 Durango (Bizka CIRlMAT, Universite de Toulouse, ENSIACET, B. P. 74233, 31432 Toulouse cedex 4, France
国际会议
69th World Foundry Congress(第69届世界铸造会议 WFC 2010)
杭州
英文
271-277
2010-10-16（万方平台首次上网日期，不代表论文的发表时间）