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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.