Flexural behavior of SS316-based metal matrix composite prepared through microwave heating

Le résumé fourni par la source

SS316 is the most commonly used material among the existing stainless steels. SS316-based composite materials provide tailor-made stuff to the various automotive and machinery components due to their competent properties. In the current work, SS316, EWAC, and Cr 7 C 3 powders have been selected for the development of cast specimens in the domestic microwave applicator. The cast of the SS316+15EWAC+5Cr 7 C 3 , SS316+15EWAC+10Cr 7 C 3 , and SS316+15EWAC+15Cr 7 C 3 compositions has been prepared using a novel technique of microwave hybrid heating. The sample size of 30 × 6 mm 2 has been used for flexural strength analysis. The flexural modulus, flexural strength, maximum load, strain at break, and strain at peak load have been tested on a universal testing machine. The maximum values of flexural strength, flexural modulus, peak load, and microhardness were found 469.86 MPa, 10,2321.79 MPa, 4510.65 N, and 585.93 ± 203.33 HV respectively for SS316+15EWAC+15Cr 7 C 3 cast, and maximum strain at peak load and the maximum strain at breaking load were 3.07 and 4.29% respectively for SS316+15EWAC+10Cr 7 C 3 cast. The highest microhardness of 615 HV has been obtained at the carbide phase in the case of SS316+15EWAC+15Cr 7 C 3 cast. The XRD presented the leading peaks of σ-Fe, μ-Fe 3 Ni 2 , τ-Cr 23 C 6 , α-MoNi 4 , γ-Mo 2 C, and β-Fe 5 C 2 . The microstructural morphology of the composite casting revealed the proper coalescence of the matrix, homogeneous dispersion of reinforcements, dendrites formation, and equiaxed grain growth. Overall the metallurgical and mechanical properties of the composite cast were improved.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.