About this Abstract |
| Meeting |
2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
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| Symposium
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2026 Annual International Solid Freeform Fabrication Symposium (SFF Symp 2026)
|
| Presentation Title |
Heating Rate–Driven Interfacial Stability in Cold-Sprayed SS316L on AISI 4140 |
| Author(s) |
Abishek Kafle, Santosh Rauniyar, Kalen Baker, Ben Xu, Wei Xiong, Weihang Zhu |
| On-Site Speaker (Planned) |
Abishek Kafle |
| Abstract Scope |
CSAM repair of steel components appears highly promising, but heat treatment of different metals can be rather difficult owing to coefficient of thermal expansion (CTE) mismatch. In this study, SS316L was deposited on AISI 4140 steel, and influence of heating rate during post-deposition heat treatment (PDHT) on interface behavior was investigated. Results demonstrate heating rate dependency: samples heated at a rate of 300°C/h showed interfacial cracking and delamination, whereas those heated at 80°C/h survived such conditions. Microstructural analysis revealed metallurgical bonding and mechanical interlocking in the intermetallic layers. To investigate possible reasons for heating rate dependence, a simplified finite element model was employed, and stress evolution during heating was analyzed. As a result, it can be assumed that interface response depends on interaction between thermal mismatch stress and stress relaxation. Thus, it is evident that heating rates during heat treatment are crucially important for cold-sprayed different metals interface survival. |
| Proceedings Inclusion? |
Undecided |