Strengthening Potentials of Aluminium (2.3-3.3) % and Molybdenum (0.44-1.44) % Additives on the Compressive and Tensile Strengths of Monel 400

This paper examines aluminuim and molybdenum strengthening potentials on the compression and tensile strengths of Monel 400. Solute mix (Al and Mo) and optimization was determined using a design computer software. Production of research test samples was accomplishable with sand casting technique. Cast specimens were machined to ASTM and ISO standards. Machined specimens were heat to 950 ⁰C, soaked for one hour and allowed to cool in the furnace. Test samples were loaded into the UTM, and strained to failure. Specimens test analysis indicate [(937-967), (764-787.4)] MPa, (179-183)) GPa and (0.32-0.324) for compression and tensile strengths, elastic modulus and Poisson ratio. Test results apply to plot the compressive and tensile strengths graphs. Optimal compression and tensile strengths, elastic modulus and Poisson ratio of test specimens is (967, 787.4) MPa, 183.3 GPa and 0.324. Comparison of these properties results with that of Monel 400 and k500 showed a percentage increase of (27.4, 4.2) % and (27, 4) % for compressive and tensile strengths, 2.4 % for elastic modulus and 0 % for Poisson ratio. Solute (Al and Mo) adequate dissolution and occupation of the solvent interstitial sites refined grain sizes, increased grain boundaries and further restricted dislocation motion. These microstructural changes increased the research alloy internal stress and subsequent improvement in deformation requirements. Where strengths is a preference over weight to strength ratio, Monel 400 strengthened with Al and Mo is a preference over Monel 400 and or k500.