In situ Measurements of Irradiation-Induced Creep of Nanocrystalline Copper at Elevated Temperatures


ÖZERİNÇ S. , AVERBACK R. S. , KING W. P.

JOM, cilt.68, ss.2737-2741, 2016 (SCI İndekslerine Giren Dergi) identifier identifier

  • Cilt numarası: 68 Konu: 11
  • Basım Tarihi: 2016
  • Doi Numarası: 10.1007/s11837-016-2077-9
  • Dergi Adı: JOM
  • Sayfa Sayıları: ss.2737-2741

Özet

We have measured irradiation-induced creep on nanocrystalline copper micropillars at elevated temperatures. The micropillars, which were approximate to 1 mu m in diameter and approximate to 2 mu m in height, were fabricated from magnetron-sputtered nanocrystalline copper films. The micropillars were compressed during 2.0 MeV Ar+ bombardment and the deformation measured in situ by laser interferometry. The creep rate was measured over the stress range 10-120 MPa at approximate to 200 degrees C. The results show linear relationships of creep rate with both applied stress and displacement rate, yielding a creep compliance of 0.07 dpa(-1) GPa(-1) (dpa:displacement per atom). The findings are in good agreement with the previous results obtained using a bulge test on free-standing thin film specimens.