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Meeting MS&T22: Materials Science & Technology
Symposium Resisting Degradation from the Environment: A Symposium Honoring Carolyn M. Hansson’s Research and Pioneering Experiences as a Woman in STEM
Presentation Title Corrosion and Environmentally Assisted Cracking (EAC) Evaluation of Additively Manufactured (AM) High Strength Precipitation Hardened Steel (UNS S17400)
Author(s) Michelle Gaudett Koul, Conner Panick
On-Site Speaker (Planned) Michelle Gaudett Koul
Abstract Scope AM 17-4PH steel heat treated to the H1100 condition was characterized using the constant extension rate testing method in 3.5 wt.% NaCl solution. Results were examined as a function of specimen orientation with respect to the build direction and compared to the H1100 wrought condition. Select AM specimens showed susceptibility to corrosion which correlated with a significantly decreased ductility and strength. Scanning electron microscopy of these specimens indicated the presence of unfused powder particles and voids in the bulk AM material that appear to be susceptible to corrosion. As-melted surfaces within these voids contained Si oxides, large Nb particles, Cu precipitates and Cr depletion from the subsurface. AM materials contained a grain boundary phase that correlated with microscopically ductile intergranular fracture. Elemental grain boundary segregation/depletion was not observed but (reverted) austenite was identified in electron backscatter diffraction images.
Proceedings Inclusion? Undecided

OTHER PAPERS PLANNED FOR THIS SYMPOSIUM

Characterization of Internal Oxidation in Alloy 690 and Model Ni Alloys
Correlating Crack Tip pH to Environment Assisted Cracking Performance in Al Alloys
Corrosion and Biocompatibility of 316L Stainless Steels Fabricated by Selective Laser Melting
Corrosion and Environmentally Assisted Cracking (EAC) Evaluation of Additively Manufactured (AM) High Strength Precipitation Hardened Steel (UNS S17400)
Corrosion of Fe-Cr-Mn Stainless Steel in Supercritical Water
Evaluating the Sensitivities of SCC Susceptibility in Stainless-steel Nuclear Waste Storage Containers
Galvanic Corrosion of Active and Passive Steel Bars with Different Area Ratios
Investigation of Crack Initiation in Hydrogen Embrittled Ni-base Alloy 725
Liquid Metal Embrittlement: Cracking Open the Disparate Mechanisms
Oxidation Behavior of Model FeCrAl Steel and APMT Alloy After Exposure in Steam
Quantifying the Environmentally Assisted Cracking Initiation and Short Crack Behavior in New Generation 7xxx Aluminium
Relating Microstructure to Environmental Degradation in Al-Mg Alloys
The Effect of Microstructural Surface States on the Corrosion of Additively Manufactured 316 Stainless Steel

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