PREDICTION OF ROOM TEMPERATURE MECHANICAL PROPERTIES IN ALUMINIUM CASTINGS
Prediction of material properties for alloy castings is an old dream of foundrymen and casting designers. As the recent development of JMatPro computer software has made it possible to successfully model physical and thermophysical properties during solidification , it is a natural step to go further and to predict the mechanical properties of casting alloys. The aim of the present work is to develop a model that can be used to calculate the room temperature mechanical properties for a wide range of cast aluminium alloys. The model calculates mechanical properties based on the microstructure in the casting, which is determined by the chemical composition and casting conditions. The first part of the paper describes the microstructural evolution during solidification, where the cooling curve during solidification and dendrite arm spacing (DAS) are calculated as a function of the alloy chemistry and initial cooling rate. The second part features the development of a model for strength calculation. The strengthning mechanisms considered are solid solution strengthening, precipitation hardening and the DAS size effect. The phases that contribute to strengthening includes primary phases, various types of eutectics and intermetallics. Finally a strength- hardness conversion and calculation of the stress- strain curve are provided.
Aluminium alloys Mechanical properties Casting alloys Dendrite arm spacing
Zhanli GUO Nigel SAUNDERS Peter MIODOWNIK Jean-Philippe SCHILLE
Sente Software Ltd., Surrey Technology Centre, Guildford GU2 7YG, U.K
国际会议
大连
英文
687-699
2007-08-19（万方平台首次上网日期，不代表论文的发表时间）