The refinement potential of AI-3.5FeNb-I.5C master alloy on pure aluminium and AI-9.8Si-3.4Cu alloy has been investigated. Different amounts of AI-3.5FeNb-I.5C master alloy were added to estimate the optimal addition ...The refinement potential of AI-3.5FeNb-I.5C master alloy on pure aluminium and AI-9.8Si-3.4Cu alloy has been investigated. Different amounts of AI-3.5FeNb-I.5C master alloy were added to estimate the optimal addition level. It was found that the addition of AI-3.5FeNb-I.5C grain refiner can promote significantly the refinement of grains in the pure aluminium, particularly at 0.1wt.%, with the mean primary aluminium a-grain size reducing to 187＋3 IJm from about 1-3 mm. Similarly, the microstructural study of the AI-9.8Si-3.4Cu alloy die casting at different weight percentages （viz. 0.0wt.%, 0.1wt.% and 1.0wt.%） of AI-3.5FeNb-I.5C master alloy shows that the AI-3.5FeNb-I.5C master alloy as a grain refiner is also acceptable for AI-Si cast alloys when the silicon content is more than 4wt.%. As a result of inoculation with AI-3.5FeNb-1.5C master alloy, the average grain size of a-AI is reduced to 22＋3 #m from about 71＋3 IJm and grain refining efficiency is not characterized by any visible poisoning effect, which is the major limitation in the grain refinement of AI-Si cast alloys by applying AI-Ti-B ternary master alloys. Mechanical properties such as ultimate tensile strength and yield strength are significantly improved by 9.6% and 9.7%, respectively.展开更多
基金financially supported by the National Institute of Technology(NIT),Manipur-India to carry out the industrial experimental research work
文摘The refinement potential of AI-3.5FeNb-I.5C master alloy on pure aluminium and AI-9.8Si-3.4Cu alloy has been investigated. Different amounts of AI-3.5FeNb-I.5C master alloy were added to estimate the optimal addition level. It was found that the addition of AI-3.5FeNb-I.5C grain refiner can promote significantly the refinement of grains in the pure aluminium, particularly at 0.1wt.%, with the mean primary aluminium a-grain size reducing to 187＋3 IJm from about 1-3 mm. Similarly, the microstructural study of the AI-9.8Si-3.4Cu alloy die casting at different weight percentages （viz. 0.0wt.%, 0.1wt.% and 1.0wt.%） of AI-3.5FeNb-I.5C master alloy shows that the AI-3.5FeNb-I.5C master alloy as a grain refiner is also acceptable for AI-Si cast alloys when the silicon content is more than 4wt.%. As a result of inoculation with AI-3.5FeNb-1.5C master alloy, the average grain size of a-AI is reduced to 22＋3 #m from about 71＋3 IJm and grain refining efficiency is not characterized by any visible poisoning effect, which is the major limitation in the grain refinement of AI-Si cast alloys by applying AI-Ti-B ternary master alloys. Mechanical properties such as ultimate tensile strength and yield strength are significantly improved by 9.6% and 9.7%, respectively.
