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Evaluation of Mechanical Properties of Aluminium Alloy Subjected to Grain Refinement

Praveen Kumar, T. Anil Kumar


From the metallurgical and material science perspective, grain refinement is the reduction in the size of the grains inside a material which enhances wear, toughness, formability, yield strength, and fatigue properties. One such method of grain refinement called inoculation wherein certain alloys are added to molten metal during cast. The present study involves in investigating the influence of inoculant Al-5Ti-B master alloy on the mechanical, structural, and wear properties of Al-9.8Zn-2.31Mg aluminium alloy. Samples were prepared by varying master alloy wt% (0, 0.5, 1.5, and 2.5). Pin-on-disc wear test is carried out to characterize dry frictional wear property on different compositions and sample. With 1.5 wt% of master alloy showed better wear resistance compared to other composition. As the percentage of the master alloy increased, the hardness also increased proportionally till 1.5 wt%, after which steep decrease in hardness is observed. Optical microscope is used to characterize the morphology of grain formed after cast, and the optimum size of grains was developed for 1.5 wt% of master alloy showing better wear and hardness.


Inoculation; Grain refinement; Master alloy; Morphology;Wear resistance

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