Microstructure and corrosion behavior of 316L stainless steel prepared using different additive manufacturing methods: A comparative study bringing insights into the impact of microstructure on their passivity

2020 ◽  
Vol 176 ◽  
pp. 108914 ◽  
Author(s):  
Reynier I. Revilla ◽  
Matthieu Van Calster ◽  
Marc Raes ◽  
Galid Arroud ◽  
Francesco Andreatta ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
Comparative Study ◽  
Corrosion Behavior ◽  
316L Stainless Steel ◽  
Manufacturing Methods ◽  
The Impact

scholarly journals The Corrosion Behavior of 316L Stainless Steel Additively Manufactured by Direct Energy Deposition Process

2021 ◽  
Vol 6 (1) ◽  
pp. 13
Author(s):  
Tomer Ron ◽  
Avi Leon ◽  
Amnon Shirizly ◽  
Eli Aghion
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Additive Manufacturing ◽  
Corrosion Behavior ◽  
Energy Deposition ◽  
316L Stainless Steel ◽  
High Energy ◽  
Aisi 316L ◽  
Direct Energy Deposition ◽  
Direct Energy

Traditional additive manufacturing (AM) technologies tend to focus on powder bed fusion (PBF) methods, such as SLM (selective laser melting) and EBM (electron beam melting), that are attractive for the rapid production of complex components. However, their inherent drawbacks include the high cost of powders, high energy consumption and size limitation. Hence, more affordable and flexible direct energy deposition processes, such as wire arc additive manufacturing (WAAM), are gaining increased interest. This study aims to evaluate the corrosion behavior, including the stress corrosion resistance of 316L stainless steel, produced by the WAAM process. Experimental samples in the form of cylindrical rods were produced by WAAM process using 316L stainless steel wires and compared with their counterpart AISI 316L alloy. The corrosion resistance was evaluated using potentiodynamic polarization, impedance spectroscopy and slow strain rate testing (SSRT). Despite the differences between the microstructures of printed WAAM 316L alloy and its counterpart AISI 316L, the corrosion performance of both alloys in 3.5% NaCl solution was quite similar.

scholarly journals Impact of the Allowed Compositional Range of Additively Manufactured 316L Stainless Steel on Processability and Material Properties

Materials ◽  
2021 ◽  
Vol 14 (15) ◽  
pp. 4074
Author(s):  
Felix Großwendt ◽  
Louis Becker ◽  
Arne Röttger ◽  
Abootorab Baqerzadeh Chehreh ◽  
Anna Luise Strauch ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
Additive Manufacturing ◽  
Chemical Composition ◽  
316L Stainless Steel ◽  
Nickel Content ◽  
Equivalent Ratio ◽  
Compositional Range ◽  
The Impact ◽  
Nickel Equivalent

This work aims to show the impact of the allowed chemical composition range of AISI 316L stainless steel on its processability in additive manufacturing and on the resulting part properties. ASTM A276 allows the chromium and nickel contents in 316L stainless steel to be set between 16 and 18 mass%, respectively, 10 and 14 mass%. Nevertheless, the allowed compositional range impacts the microstructure formation in additive manufacturing and thus the properties of the manufactured components. Therefore, this influence is analyzed using three different starting powders. Two starting powders are laboratory alloys, one containing the maximum allowed chromium content and the other one containing the maximum nickel content. The third material is a commercial powder with the chemical composition set in the middle ground of the allowed compositional range. The materials were processed by laser-based powder bed fusion (PBF-LB/M). The powder characteristics, the microstructure and defect formation, the corrosion resistance, and the mechanical properties were investigated as a function of the chemical composition of the powders used. As a main result, solid-state cracking could be observed in samples additively manufactured from the starting powder containing the maximum nickel content. This is related to a fully austenitic solidification, which occurs because of the low chromium to nickel equivalent ratio. These cracks reduce the corrosion resistance as well as the elongation at fracture of the additively manufactured material that possesses a low chromium to nickel equivalent ratio of 1.0. A limitation of the nickel equivalent of the 316L type steel is suggested for PBF-LB/M production. Based on the knowledge obtained, a more detailed specification of the chemical composition of the type 316L stainless steel is recommended so that this steel can be PBF-LB/M processed to defect-free components with the desired mechanical and chemical properties.

Corrosion behavior of cold-rolled and post heat-treated 316L stainless steel in 0.9wt% NaCl solution

2021 ◽  
Vol 28 (3) ◽  
pp. 440-449
Author(s):  
K. Bin Tayyab ◽  
A. Farooq ◽  
A. Ahmed Alvi ◽  
A. Basit Nadeem ◽  
K. M. Deen
Keyword(s):  
Stainless Steel ◽  
Corrosion Behavior ◽  
316L Stainless Steel ◽  
Nacl Solution ◽  
Heat Treated ◽  
Cold Rolled

Microstructure and Corrosion Resistance of HVOF Sprayed 316L Stainless Steel and Ni Base Alloy Coatings

2000 ◽  
Author(s):  
S. Kuroda ◽  
T. Fukushima ◽  
T. Kodama ◽  
M. Sasaki
Keyword(s):  
Stainless Steel ◽  
Corrosion Resistance ◽  
316L Stainless Steel ◽  
Sea Water ◽  
Base Alloy ◽  
Standard Condition ◽  
Polarization Measurement ◽  
Superior Corrosion Resistance ◽  
Distribution Composition ◽  
The Impact

Abstract 316L stainless steel and Hastelloy C alloy powders were sprayed by an HVOF apparatus onto mild steel substrates. The microstructure, pore size distribution, composition and corrosion resistance of thus obtained coatings were evaluated experimentally. Corrosion resistance in sea-water was examined by monitoring the impedance and corrosion potential of samples immersed in artificial sea-water at 300 K over a period of more than 3 months and also by polarization measurement. It was found that the stainless coatings composed mainly of plastically deformed particles and some splats which were molten at the impact. By increasing the combustion pressure, the porosity as measured by mercury porosimeter could be reduced to below 1%. In comparison, Hastelloy C deposits sprayed under the standard condition were so dense that its porosity could not be measured by the porosimeter. The polarization curve and the results of impedance monitoring both exemplified that the Hastelloy C coatings possess much superior corrosion resistance to the stainless coatings in sea-water, which was attributed to the higher density and better adhesion of the Ni-base alloy coatings.

Effect of contaminations on the acoustic emissions during wire and arc additive manufacturing of 316L stainless steel

2021 ◽  
pp. 102585
Author(s):  
André Ramalho ◽  
Telmo G. Santos ◽  
Ben Bevans ◽  
Ziyad Smoqi ◽  
Prahalad Rao ◽  
...  
Keyword(s):  
Stainless Steel ◽  
Additive Manufacturing ◽  
316L Stainless Steel ◽  
Acoustic Emissions
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