Abstract
The corrosion resistance of Cr-containing alloy parts made by additive manufacturing can be significantly improved by a post-treatment of gas-phase-based infusion of concentrated interstitial solute (carbon and nitrogen). We demonstrate this universal approach for the example of low-temperature nitrocarburization by solid-reagent pyrolysis applied to Alloy 22 (UNS N06022) parts made by laser powderbed fusion. We show that the post-treatment improves the crevice-corrosion resistance of these parts, as well as the corrosion resistance of corresponding parts made from wrought Alloy 22 to surpass the maximum crevice corrosion test temperature specified in ASTM G48-D, whereas non-treated samples typically fail well below. Similarly, cyclic potentiodynamic polarization testing (ASTM G61-86) demonstrates that the post-treatment makes the additively manufactured alloy and the wrought alloy more corrosion-resistant than the non-treated wrought alloy.
Subject
General Materials Science,Metals and Alloys
Reference32 articles.
1. Heat treatment for metal additive manufacturing;Laleh;Prog. Mater. Sci.,2023
2. Thermochemical post-processing of additively manufactured austenitic stainless steel;Funch;Surf. Coatings Technol.,2022
3. Montanari, R., Lanzutti, A., Richetta, M., Tursunbaev, J., Vaglio, E., Varone, A., and Verona, C. (2022). Plasma Carburizing of Laser Powder Bed Fusion Manufactured 316 L Steel for Enhancing the Surface Hardness. Coatings, 12.
4. Microstructure and corrosion resistance of laser additively manufactured 316L stainless steel;Trelewicz;Jom,2016
5. Corrosion of additively manufactured alloys: A review;Sander;Corrosion,2018
Cited by
2 articles.
订阅此论文施引文献
订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献