Optimization of investment casting parameters for propeller hub to improve mechanical properties LM25

Mat Yusop, Alia Nur Fatihah (2024) Optimization of investment casting parameters for propeller hub to improve mechanical properties LM25. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

The thesis report discusses the difficulties of manufacturing propeller hubs shell moulds focusing the difficulties caused by the complex geometric design. The complex shape of the propeller hub requires precision in the casting procedure to guarantee accurate measurement, excellent surface quality and also minimum defects. The investment casting method known for its versatility for different materials such as aluminium alloy, stainless steel and also nickel based alloys that is suited for the propeller applications. In this thesis report also discusses an experimental parameter that concerned with the optimization of investment casting parameter for propeller hub to improve the mechanical properties of LM25 aluminium alloy. The LM25 investment casting product were studied in this thesis report based on the parameter of investment casting within the parameter of types of mixture, number of layers and also preheat temperature. 9 experiments were conducted to asses the effect of this parameter. The optimization process for propeller hub ceramic shells will be determined by the analysis of mechanical properties which will be performed by using the tensile testing, hardness testing and also elongation in the tensile testing and analyze the data by using the Taguchi method. This experiment aims to optimize the the overall efficiency of investment casting for complex components by optimizing the investment casting parameters according to the propeller hub requirements.

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