| About this Abstract |
| Meeting |
2021 TMS Annual Meeting & Exhibition
|
| Symposium
|
Environmental Degradation of Additively Manufactured Alloys
|
| Presentation Title |
Improving the Corrosion Performance of Additively Manufactured 316L via Chemically-modified Feedstock |
| Author(s) |
Joseph Sopcisak, Steven Storck, Rengaswamy Srinivasan, Jason Trelewicz, David Sprouster, Kevin Hemker, Mo-Rigen He, Timothy Montalbano |
| On-Site Speaker (Planned) |
Joseph Sopcisak |
| Abstract Scope |
Due to the complex thermal profiles associated with consolidation of material on small length scales, additive manufacturing (AM) has many advantages over conventional manufacturing methods. Nevertheless, the implementation of AM into corrosive environments is ultimately limited by the poor corrosion performance of metal AM components when compared to their conventionally manufactured counterparts. We demonstrate improvement in the pitting corrosion resistance of AM-316L via modification of the feedstock material. In this effort, 316L powder was modified by adding trace amounts of ceramic dopant. Test specimens were manufactured in a LPBF system and were consolidated via SLM. The resultant material shows little or no evidence of pitting corrosion in aqueous solutions of 5%, 30% and 60% FeCl3. It also remains free of pitting corrosion under anodic polarization in aqueous 3.5% sodium chloride electrolyte. High resolution TEM and synchrotron x-ray analysis were carried out to understand the underlying mechanisms causing this improvement. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Environmental Effects, Iron and Steel |