| Issue |
MATEC Web Conf.
Volume 370, 2022
2022 RAPDASA-RobMech-PRASA-CoSAAMI Conference - Digital Technology in Product Development - The 23rd Annual International RAPDASA Conference joined by RobMech, PRASA and CoSAAMI
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| Article Number | 03006 | |
| Number of page(s) | 8 | |
| Section | Material Development | |
| DOI | https://doi.org/10.1051/matecconf/202237003006 | |
| Published online | 01 December 2022 | |
Predicting the CTE & hardness for directed energy deposition of functionally graded WC-SS316L Coatings
1 Department of Industrial Engineering, Stellenbosch University, Stellenbosch, South Africa
2 DSI-NRF Centre of Excellence in Strong Materials (CoE-SM), South Africa
* Corresponding author: 23487410@sun.ac.za
One of the key components in the design of wear resistant coatings for directed energy deposition is the analysis of the thermo-mechanical properties within the substrate-coating interface. The coefficient of thermal expansion (CTE) and the mismatch are crucial due to their significant influence on the structural integrity and operational performance of the coating. In this study, a four-layered functionally graded tungsten carbide (WC)-316L stainless steel composite coating was designed using a rule-of-mixtures approach for manufacture by directed energy deposition. Two theoretical models were employed to predict the CTE and micro-hardness as a function of increasing volume fraction of WC particles. According to the graded concentrations predicted from the linear models, the four-layer coating exhibits a good hardness with minimal CTE mismatch.
© The Authors, published by EDP Sciences, 2022
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