About this Abstract |
Meeting |
2023 TMS Annual Meeting & Exhibition
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Symposium
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Advances in Multi-Principal Element Alloys II
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Presentation Title |
Mechanical Determination of Peak Short-range Ordering in CrCoNi via Nanoindentation |
Author(s) |
Mingwei Zhang, Qin Yu, Carolina Frey, Flynn Walsh, Madelyn Payne, Punit Kumar, Dongye Liu, Easo George, Tresa Pollock, Mark Asta, Robert Ritchie, Andrew Minor |
On-Site Speaker (Planned) |
Mingwei Zhang |
Abstract Scope |
Despite the recent success of directly imaging short-range ordering (SRO) in multi-principal element alloys (MPEAs) via energy-filtered TEM (EFTEM), the effect of SRO on their mechanical properties has not been explored in detail. In the present study, we report on the results from nanoindentation experiments on splat quenched, water quenched, and 600 – 1000 ºC aged CrCoNi samples that were intended to generate different extents of SRO. Complementary uniaxial tensile experiments on bulk polycrystalline samples were also performed to generate a comparison between the effect of SRO on bulk mechanical properties and nanomechanical properties. Although no notable difference was observed in macroscopic properties, the nanoindentation results exhibit a clear increase in pop-in loads after aging, where peak strength that corresponds to maximum SRO was observed at the aging temperature of 900 ºC. This trend is also qualitatively verified by direct EFTEM characterization of SRO. |
Proceedings Inclusion? |
Planned: |