Selective laser melting of low-content graphene nanoplatelets reinforced 316L austenitic stainless steel matrix: Strength enhancement without affecting ductility

AbstractThe paper presents the results of the basic mechanical properties determined in the static tensile test, impact un-notched Charpy test and hardness of austenitic stainless steel type 316L produced by two techniques: classical pressing and sintering in a vacuum with rapid cooling and selective laser melting (SLM). In this work fracture surface of Charpy test, samples were studied.The results indicate that application of selective laser melting (SLM) makes it possible to double increase the strength properties of components manufactured from austenitic stainless steel type 316L compared to sintering in a vacuum. Resulted in mechanical properties strongly depend on porosity characteristic and the presence of superficial oxides in the case of sintered steel and the character of observed microstructural defects deriving from non-fully melted powder particles and the formation of voids between subsequently melted pool tracks during the SLM.

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The effects of hot isostatic pressing (HIP) and solubilization heat treatment on the density, mechanical properties, and microstructure of austenitic stainless steel parts produced by selective laser melting (SLM)

The International Journal of Advanced Manufacturing Technology ◽

10.1007/s00170-020-05072-9 ◽

2020 ◽

Vol 107 (1-2) ◽

pp. 109-122 ◽

Cited By ~ 3

Author(s):

Erica Liverani ◽

Adrian H. A. Lutey ◽

Alessandro Ascari ◽

Alessandro Fortunato

Keyword(s):

Mechanical Properties ◽

Heat Treatment ◽

Stainless Steel ◽

Austenitic Stainless Steel ◽

Selective Laser Melting ◽

Hot Isostatic Pressing ◽

Laser Melting ◽

Isostatic Pressing

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Microstructure and Microhardness of ZrO2 Reinforced PM 316L Austenitic Stainless Steel Composites Sintered in Ambient and Argon Atmosphere

International Journal of Engineering and Advanced Technology - Regular Issue ◽

10.35940/ijeat.e7412.088619 ◽

2019 ◽

Vol 8 (6) ◽

pp. 38-42

Keyword(s):

Stainless Steel ◽

Electron Microscope ◽

Austenitic Stainless Steel ◽

Testing Machine ◽

Argon Atmosphere ◽

Steel Matrix ◽

Matrix Composites ◽

Hardness Testing ◽

316L Austenitic Stainless Steel ◽

Scanning Electron

The present study examines the microstructure and microhardness of zirconia (ZrO2) reinforced PM 316L austenitic stainless steel matrix composites. ZrO2 was added in a proportion of 1 wt% to 3 wt%. Powders were compacted into a disc of 11mm diameter and 2mm thick at 70kN. Compacts were sintered in an ambient and argon atmosphere at 1250oC for 30 minutes. Sintered compacts were then analyzed for microhardness using Vickers hardness testing machine, and microstructure was examined using a scanning electron microscope. The study revealed that the reinforcement of ZrO2 significantly enhanced the microhardness of PM 316L SS matrix composites with a microstructure consisting of irregular porosity and zirconia encapsulating the 316L SS particles.

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