This work reports on irradiation-induced creep (IIC) measured onnanolaminate (Cu-W and Ni-Ag) and nanocrystalline alloys (Cu-W)at room temperature using a combination of heavy ion irradiation and nanopillar compression performed concurrentlyinsituin a transmission electron microscope.Appreciable IICis observed in multilayers with 50 nm layer thicknesses at high stress, ≈½ the yield strength, but not in multilayers with only 5 nm layer thicknesses.

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