Investigation of GNP effect on mechanical and morphological characteristics of liquid phase sintered SS316l nanocomposites processed via mechanical alloying and pressureless sintering

• Autorzy: Veeramallu Kalyanamanohar , Krishna Alluru Gopala

Identyfikatory

DOI

10.62753/ctp.2024.03.2.2

• Języki publikacji: EN

Abstrakty

EN

This study focuses on the development of stainless steel (SS) 316L nanocomposites reinforced with graphene nanoplatelets (GNP) employing the pressureless sintering technique. The optimal pressure of 600 MPa was used to obtain green composite samples. Composite samples with GNP weight percentages of 0.25, 0.5, and 0.75 were sintered at 1400 °C for 90 minutes under vacuum of 0.001 mbar. The effect of the GNP reinforcement on the SS316L composites was investigated by means of microstructure observations and mechanical tests. The observations of the microstructure of the composite samples revealed equiaxed and twin-grain structures, implying austenite. Grain refinement can be observed as a consequence of the addition of GNP up to 0.5 wt.% in the SS316L matrix. GNP were found to be an effective reinforcement in improving the hardness (287.7 HV) and ultimate tensile strength (554.62 MPa). However, for the 0.75 wt.% GNP composite samples, issues like agglomeration, grain coarsening, and the presence of a grain boundary precipitate (Cr7C3) resulted in a deterioration of the mechanical properties.

Słowa kluczowe

EN

SS316L; graphene nanoplatelets; grain boundary precipitate; carbides; tensile strength

PL

SS316L; węgliki; wytrzymałość na rozciąganie; grafen

• Wydawca: Polskie Towarzystwo Materiałów Kompozytowych
• Czasopismo: Composites Theory and Practice
• Rocznik: 2024
• Tom: R. 24, nr 2
• Strony: 95--103
• Opis fizyczny: Bibliogr. 45 poz., rys., tab.

Twórcy

autor

Veeramallu Kalyanamanohar

• University College of Engineering Kakinada (A), Department Mechanical Engineering, JNTUK Kakinada, 533003, Andhra Pradesh, India

autor

Krishna Alluru Gopala

• University College of Engineering Kakinada (A), Department Mechanical Engineering, JNTUK Kakinada, 533003, Andhra Pradesh, India

Bibliografia

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