Remarkable enhancement in thermal conductivity of stainless-steel leveraging metal composite via laser powder bed fusion: 316L-Cu composite
Journal Article
·
· Additive Manufacturing
- Oregon State University, Corvallis, OR (United States); Advanced Technology and Manufacturing Institute (ATAMI), Corvallis, OR (United States); Oregon State University
- Oregon State University, Corvallis, OR (United States)
- Oregon State University, Corvallis, OR (United States); Advanced Technology and Manufacturing Institute (ATAMI), Corvallis, OR (United States)
- Ghent University (Belgium)
- Oryx Advanced Materials, Inc., Penang (Malaysia)
- Oryx Advanced Materials, Inc., Fremont, CA (United States)
This work aimed to significantly enhance the thermal conductivity of the SS matrix by fabricating a metal composite SS-Cu system utilizing a laser powder bed fusion process. The impact of process parameters on the microstructure of SS-Cu samples is investigated. Here, the processing and post-processing factors that influence the effective thermal conductivity of the metal composite SS-Cu system are discussed. Then, the effective thermal conductivity and mechanical properties of the SS-Cu composite are measured at room temperature and operating temperature of 300 °C. The optimized laser powder bed fusion parameters led to low Marangoni convection, high cooling rate, greater macro-segregation, and higher thermal conductivity values albeit at the cost of ductility in SS-Cu metal composite likely due to the presence of the unmelted powder particles. As-printed SS-60 vol % Cu and annealed SS-60 vol % Cu had 2.5X and 6.6X thermal conductivity enhancement, respectively. During annealing, phase separation, partial melting of Cu, and formation of a continuous network of Cu surrounding SS play a key role in enhancing the thermal conductivity of the SS-Cu metal composite structure.
- Research Organization:
- RAPID Manufacturing Institute, New York, NY (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE)
- Grant/Contract Number:
- EE0007888
- OSTI ID:
- 2212447
- Journal Information:
- Additive Manufacturing, Journal Name: Additive Manufacturing Vol. 70; ISSN 2214-8604
- Publisher:
- ElsevierCopyright Statement
- Country of Publication:
- United States
- Language:
- English
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