The Effect of Microstructural Imperfections on Corrosion Fatigue of Additively Manufactured ER70S-6 Alloy Produced by Wire Arc Deposition

This study aims at evaluating the effect of microstructure imperfections on the corrosion fatigue performance of an ER70S-6 alloy produced by wire arc additive manufacturing (WAAM) process, in a 3.5% NaCl solution. For reference, a regular ST-37 alloy with relatively similar chemical composition was...

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Bibliographic Details
Published in:Metals (Basel ) 2020-01, Vol.10 (1), p.98
Main Authors: Ron, Tomer, Levy, Galit Katarivas, Dolev, Ohad, Leon, Avi, Shirizly, Amnon, Aghion, Eli
Format: Article
Language:English
Subjects:
Additive manufacturing
Alloying additive
Alloys
Arc deposition
Carbon
Chemical composition
corrosion
Corrosion effects
Corrosion fatigue
Corrosion resistance
Defects
direct energy deposition
Electrodes
er70s-6
fatigue
Fatigue strength
Mechanical properties
Metal fatigue
Microstructure
steel
Wire
wire arc deposition
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Summary:This study aims at evaluating the effect of microstructure imperfections on the corrosion fatigue performance of an ER70S-6 alloy produced by wire arc additive manufacturing (WAAM) process, in a 3.5% NaCl solution. For reference, a regular ST-37 alloy with relatively similar chemical composition was considered as a counterpart alloy. This was justified by the fact that the ER70S-6 alloy is usually used for conventional welding of ST-37 steel. The results obtained indicated that while the ST-37 alloy exhibited fatigue strength of 240 MPa in the corrosive solution, the additively manufactured ER70S-6 alloy showed fatigue strength of only 140 MPa. These differences were related to microstructural imperfections that are inherently produced during the WAAM process.
ISSN:2075-4701
2075-4701
DOI:10.3390/met10010098