About this Abstract |
Meeting |
3rd World Congress on High Entropy Alloys (HEA 2023)
|
Symposium
|
HEA 2023
|
Presentation Title |
Property and Microstructure Evaluation of Directed Energy Deposition High Entropy Alloys and Functionally Graded Materials |
Author(s) |
Yogesh Kumar Singla, Luis Nunez III, Calvin Downey, Isabella J. van Rooyen, Michael R Maughan |
On-Site Speaker (Planned) |
Yogesh Kumar Singla |
Abstract Scope |
The present work investigates the mechanical and microstructural properties of high entropy alloys (HEAs) and functionally graded materials (FGMs) manufactured with SS316L substrates using powder blown directed energy deposition. The HEAs and FGMs contain a mixture of commercially available IN718, SS316L and 70Co30Cr and the effect of compositional variation on hardness was studied using nanoindentation. Optical microscopy revealed the inclusion of unsintered particles and porosity. EDS analysis confirmed that unsintered particles consist of CoCr. Optical microscopy also showed that the layers are mechanically and metallurgically well bonded to each other. The samples were primarily crack-free, however, micro-cracks were observed in one of the FGM samples. Nanoindentation results from 1000 indents on each sample indicated that HEA has overall higher hardness compared to FGMs. In the FGMs a decrease in hardness was observed with the decrease of CoCr percentage. |
Proceedings Inclusion? |
Planned: Metallurgical and Materials Transactions |