Effects of in-process LN2 cooling on the microstructure and mechanical properties of type 316L stainless steel produced by wire arc directed energy deposition

2021 ◽  
Vol 282 ◽  
pp. 128707
Author(s):  
C.R. Cunningham ◽  
V. Dhokia ◽  
A. Shokrani ◽  
S.T. Newman
Keyword(s):  
Mechanical Properties ◽  
Stainless Steel ◽  
Energy Deposition ◽  
316L Stainless Steel ◽  
Directed Energy Deposition ◽  
Microstructure And Mechanical Properties ◽  
Type 316L ◽  
Directed Energy ◽  
Type 316L Stainless Steel

scholarly journals Microstructural banding of directed energy deposition-additively manufactured 316L stainless steel

2021 ◽  
Vol 69 ◽  
pp. 96-105
Author(s):  
Yoon Hwa ◽  
Christopher S. Kumai ◽  
Thomas M. Devine ◽  
Nancy Yang ◽  
Joshua K. Yee ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Energy Deposition ◽  
316L Stainless Steel ◽  
Directed Energy Deposition ◽  
Directed Energy

scholarly journals Directed Energy Deposition of AISI 316L Stainless Steel Powder: Effect of Process Parameters

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 932
Author(s):  
Alberta Aversa ◽  
Giulio Marchese ◽  
Emilio Bassini
Keyword(s):  
Stainless Steel ◽  
Tensile Properties ◽  
Energy Deposition ◽  
316L Stainless Steel ◽  
Aisi 316L ◽  
Aisi 316L Stainless Steel ◽  
Directed Energy Deposition ◽  
Directed Energy ◽  
Building Parameters

During Laser Powder-Directed Energy Deposition (LP-DED), many complex phenomena occur. These phenomena, which are strictly related to the conditions used during the building process, can affect the quality of the parts in terms of microstructural features and mechanical behavior. This paper investigates the effect of building parameters on the microstructure and the tensile properties of AISI 316L stainless-steel samples produced via LP-DED. Firstly, the building parameters were selected starting from single scan tracks by studying their morphology and geometrical features. Next, 316L LP-DED bulk samples built with two sets of parameters were characterized in terms of porosity, geometrical accuracy, microstructure, and mechanical properties. The tensile tests data were analyzed using the Voce model and a correlation between the tensile properties and the dislocation free path was found. Overall, the data indicate that porosity should not be considered the unique indicator of the quality of an LP-DED part and that a mechanical characterization should also be performed.

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