About this Abstract |
Meeting |
MS&T23: Materials Science & Technology
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Symposium
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High Entropy Materials: Concentrated Solid Solutions, Intermetallics, Ceramics, Functional Materials and Beyond IV
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Presentation Title |
Study on Early-stage Irradiation Damage in Concentrated Solid-solution Alloys by Nanoindentation |
Author(s) |
Liuqing Yang, Youxing Chen, Jimmie Miller, William John Weber, Yanwen Zhang |
On-Site Speaker (Planned) |
Liuqing Yang |
Abstract Scope |
Newly emerged concentrated solid-solution alloys (CSAs) have attracted extensive attention owing to unexpected irradiation tolerance. Most portions of research endeavors are directed ultimate irradiation tolerance of CSAs at high level of radiation damage. Less experimental work was on nascent stage of radiation as well as radiation-modified surface properties. It has been a long-stand challenge to quantify irradiation-induced defects at low dose due to difficulty of quantitatively measuring population of point defects and radiation-induced dislocations. Nanoindentation has capability of depth-sensitive detection, providing the opportunity to probe surface properties of shallow irradiated layers. In this study, a unique set of irradiated CSAs including NiCo, NiFe, NiCoFeCr samples will be explored. The influence of radiation dose and alloying elements on hardening will be studied. And the early-stage damage in irradiated samples is expected to be quantitatively evaluated through nanoindentation. Finally, potential irradiation hardening mechanisms in the nascent stage are anticipated to be unraveled. |