| About this Abstract |
| Meeting |
2025 TMS Annual Meeting & Exhibition
|
| Symposium
|
Spatially Tailored Materials: Processing-Structure-Properties
|
| Presentation Title |
Evolution of metastable phase in the chromium cladding developed over stainless steel substrate using laser directed energy deposition |
| Author(s) |
vishal Singh, Vishwanadh Bathula, Sudip Kumar Sarkar, Christ Prakash Paul, Raghvendra Tewari |
| On-Site Speaker (Planned) |
vishal Singh |
| Abstract Scope |
In the present study, multiple single layer clads of pure Cr over Steel substrate were developed using laser assisted directed energy deposition (DED) at different laser power, scan speeds and powder flow rates in controlled atmosphere conditions. The cross section of the clads have been investigated using scanning electron microscopy (SEM), electron back scattered diffraction (EBSD), scanning transmission electron microscopy (STEM), atom-probe tomography (APT) and synchrotron X-ray diffraction (XRD) techniques. The investigation revealed the formation of Cr rich metastable phase in the inter-cellular grain boundaries which leads to generation of cracks. In addition, the claddings developed at high scan speeds and low powder flow rates do not show such cracks due to the absence of the metastable phase. The current study explained the role of processing variables in evading the brittle metastable phase which leads to crack free adherent joint. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
Additive Manufacturing, Characterization, Phase Transformations |