| About this Abstract |
| Meeting |
Materials Science & Technology 2020
|
| Symposium
|
Micro- and Nano-Mechanical Behavior of Materials
|
| Presentation Title |
Small-Scale Mechanical Behavior of Ion-irradiated Amorphous Metals versus Multi-Principal Alloys |
| Author(s) |
Maryam Sadeghilaridjani, Vahid Hasannaeimi, Shristy Jha, Sundeep Mukherjee |
| On-Site Speaker (Planned) |
Sundeep Mukherjee |
| Abstract Scope |
The effect of ion irradiation on the mechanical properties of amorphous metals will be discussed and compared with the response of multi-principal alloys (or high entropy alloys). The changes in hardness, modulus, and strength were characterized as a function of irradiation depth using small-scale techniques such as nanoindentation and micro-pillar compression. After Ni-ion irradiation, the metallic glass showed lower hardness and yield strength. In contrast, both the high entropy alloy and 304 stainless steel showed hardening after irradiation, with the degree of hardening being significantly higher for the steel. Irradiation-induced hardening of the steel and HEA was attributed to hindrance of dislocation movement from the defects generated. Softening behavior of the metallic glass was attributed to structural changes and increase in free volume in the irradiated region while retaining a fully amorphous state. |