Intergranular Corrosion of Feedstock Modified—Additively Manufactured Stainless Steel After Sensitization
Abstract
Laser powder bed fusion (LPBF), a metal additive manufacturing technique, was conducted on feedstock-modified 316L stainless steel (316L) powder produced by ball-milling of commercial 316L and 1 wt% additive (cerium oxide—CeO2, lanthanum (III) nitrate hexahydrate—La(NO3)3·6H2O, and chromium nitride—CrN). The feedstock-modified LPBF-316L specimens were sensitized at 675°C for 24 h, and the influence of additives on intergranular corrosion (IGC) was investigated following ASTM G108-94 and A262-14 standards. The LPBF-316L with La(NO3)3·6H2O showed higher IGC resistance. The microstructure of the LPBF specimen was investigated and correlated to understand the improved IGC resistance of LPBF-316L with La(NO3)3·6H2O additive.
Document Details
- Document Type
- Pub Defense Publication
- Publication Date
- Apr 09, 2023
- Source ID
- 10.5006/4245
Entities
People
- Evan Delvecchio
- Jijo Christudasjustus
- Rajeev Kumar Gupta
- Steven Storck
- Venkata Bhuvaneswari Vukkum
Organizations
- Johns Hopkins University
- North Carolina State University
- Pacific Northwest National Laboratory