TY - JOUR
T1 - In situ creep measurements on micropillar samples during heavy ion irradiation
AU - Özerinç, Sezer
AU - Averback, Robert S.
AU - King, William P.
N1 - Funding Information:
This research was supported by the U.S. Department of Energy, Office of Basic Energy Sciences, Division of Materials Sciences and Engineering under Award DEFG02-05ER46217. The work was carried out, in part, in the Frederick Seitz Materials Research Laboratory Central Facilities, University of Illinois. We thank M. Wang for amorphous cylinder preparation and Dr. D. Schwen for running 3D-TRIM simulations.
PY - 2014/8
Y1 - 2014/8
N2 - We report on the development of an in situ micropillar compression apparatus capable of measuring creep under heavy ion beam irradiation. The apparatus has a force resolution of 1 μN and a displacement resolution of 1 nm. The experimental setup consists of a nanopositioner, a laser displacement sensor, and a microfabricated doubly clamped silicon-beam transducer. The system was tested by measuring the creep rate of amorphous Cu56Ti 38Ag6 micropillars as a function of applied stress during room temperature irradiation with 2.1 MeV Ne+. Measured values of the irradiation induced fluidity are in the range 0.5-3 dpa-1 GPa -1, and in good agreement with values obtained by stress relaxation experiments on other metallic glasses, and with predictions of molecular dynamics simulations. The in situ apparatus provides a practical approach for accelerated evaluation of irradiation induced creep in promising nuclear materials.
AB - We report on the development of an in situ micropillar compression apparatus capable of measuring creep under heavy ion beam irradiation. The apparatus has a force resolution of 1 μN and a displacement resolution of 1 nm. The experimental setup consists of a nanopositioner, a laser displacement sensor, and a microfabricated doubly clamped silicon-beam transducer. The system was tested by measuring the creep rate of amorphous Cu56Ti 38Ag6 micropillars as a function of applied stress during room temperature irradiation with 2.1 MeV Ne+. Measured values of the irradiation induced fluidity are in the range 0.5-3 dpa-1 GPa -1, and in good agreement with values obtained by stress relaxation experiments on other metallic glasses, and with predictions of molecular dynamics simulations. The in situ apparatus provides a practical approach for accelerated evaluation of irradiation induced creep in promising nuclear materials.
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U2 - 10.1016/j.jnucmat.2014.03.037
DO - 10.1016/j.jnucmat.2014.03.037
M3 - Article
AN - SCOPUS:84907421653
SN - 0022-3115
VL - 451
SP - 104
EP - 110
JO - Journal of Nuclear Materials
JF - Journal of Nuclear Materials
IS - 1-3
ER -