About this Abstract |
| Meeting |
2026 TMS Annual Meeting & Exhibition
|
| Symposium
|
Advances in Multi-Principal Element Alloys V: Mechanical Behavior
|
| Presentation Title |
Extreme Tensile Strength of Medium-Entropy Alloys Through Pulsed Lasers |
| Author(s) |
Sheron Stephany Tavares, Marc A Meyers, Gaia Righi, Carlos J Ruestes |
| On-Site Speaker (Planned) |
Marc A Meyers |
| Abstract Scope |
The tensile strength of metals at extreme strain rates is a key predictor of their performance in ballistic applications. An important experimental method for achieving these extreme strainrates is the use of high-amplitude, short-duration pulsed lasers. A new class of alloys based on the classic single-phase fcc five-component Cantor alloy shows excellent potential for use in dynamic applications. Laser shock experiments were conducted on five quaternary alloys based on the Cantor composition. The strain rates imparted were in the 10^6 to 10^7 s^-1 range, among the highest achievable experimentally. The reflected wave amplitudes, obtained by VISAR, were used to determine the tensile (spall) stress. The tensile strengths varied between 6.6 and 9.8 GPa, a factor of ten higher than the quasistatic values. This is due to two factors: the strain-rate dependence of plastic flow in these fcc alloys and the decrease in the time available for nucleation and void growth. |
| Proceedings Inclusion? |
Planned: |
| Keywords |
High-Entropy Alloys, Characterization, Mechanical Properties |