|"Effects of proton irradiation on microstructure and mechanical properties of nanocrystalline Cu–10at%Ta alloy" Priyam Patki, Yaqiao Wu, Janelle Wharry, Materialia Vol. 9 2020|
"Intrinsic-extrinsic size effect relationship for micromechanical tests"
Janelle Wharry, Kayla Yano, Priyam Patki,
Miniaturized mechanical tests are commonly utilized to evaluate properties of materials, including thin films, nanostructured, and irradiated materials. However, the specimen size effect occurs when miniaturized sample geometries contain too few dislocation sources, resulting in elevated yield stresses. The size effect is controlled by extrinsic (specimen dimensions) and intrinsic (microstructure) factors. Here, we summarize extrinsic and in- trinsic size effects from micro-compression pillar, micro-cantilever bend, and flexure studies reported in the ar- chival literature. We find an approximately linear relationship between intrinsic and extrinsic size effects. Meaningful mechanical properties can be measured when extrinsic size dominates the intrinsic size.
|"Understanding plasticity in irradiated alloys through TEM in situ compression pillar tests" Kayla Yano, Priyam Patki, Matthew Swenson, Journal of Materials Research Vol. 35 2020 1037-1050 Link|
|RTE 2nd Call Awards Announced - Projects total approximately $1.6 million These project awards went to principal investigators from 26 U.S. universities, eight national laboratories, two British universities, and one Canadian laboratory. Tuesday, May 14, 2019 - Calls and Awards|