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        Mechanical Properties Analysis of 4340 Steel Specimen Heat Treated in Oven and Quenching in Three Different Fluids

        Rachid Fakir,Noureddine Barka,Jean Brousseau 대한금속·재료학회 2018 METALS AND MATERIALS International Vol.24 No.5

        This paper proposes a statistical approach to analyze the mechanical properties of a standard test specimen, of cylindricalgeometry and in steel 4340, with a diameter of 6 mm, heat-treated and quenched in three different fl uids. Samples were evaluatedin standard tensile test to access their characteristic quantities: hardness, modulus of elasticity, yield strength, tensilestrength and ultimate deformation. The proposed approach is gradually being built (a) by a presentation of the experimentaldevice, (b) a presentation of the experimental plan and the results of the mechanical tests, (c) anova analysis of varianceand a representation of the output responses using the RSM response surface method, and (d) an analysis of the results anddiscussion. The feasibility and effectiveness of the proposed approach leads to a precise and reliable model capable of predictingthe variation of mechanical properties, depending on the tempering temperature, the tempering time and the coolingcapacity of the quenching medium.

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