About this Abstract |
Meeting |
2022 TMS Annual Meeting & Exhibition
|
Symposium
|
Dynamic Behavior of Materials IX
|
Presentation Title |
Microscale Spall Strength Measurement for CoCrFeMnNi High Entropy Alloy |
Author(s) |
Abhijeet Dhiman, Leonardo Facchini , Andrew Kustas, Remi Dingreville, Vikas Tomar |
On-Site Speaker (Planned) |
Abhijeet Dhiman |
Abstract Scope |
In this talk, we will discuss spall-strength measurements and spall-failure mechanisms in equiatomic CoCrFeMnNi high entropy alloy (HEA). We will first describe the method of fabrication based on additive manufacturing using selective laser sintering. We will then discuss our spall-strength measurement procedure which consists of laser-based flyer-plate impact experiments to induce shock pressures up to 5 GPa using asymmetric impact. We estimated the maximum tensile stress during spalling through measurements of velocity pullback using photon Doppler velocimetry. Based on our experimental measurements and fractography analysis of spall planes, we will discuss what can be learnt on the spall-failure mechanisms in these alloys and their implications of using such a class of alloys to operate in extreme environments. SNL is managed and operated by NTESS under DOE NNSA contract DE-NA0003525 |
Proceedings Inclusion? |
Planned: |
Keywords |
High-Entropy Alloys, Additive Manufacturing, Other |