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금 박막의 기계적 물성에 미치는 온도 및 변형률 속도의 영향
오충석(Chung-Seog Oh),Nikhil Karanjgaokar,Ioannis Chasiotis 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
The effect of strain rate and temperature on the inelastic properties of nanocrystalline Au films was quantified with microscale tensile specimens tested over six decades of strain rate and RT to 120 C. The full field strain and temperature distributions are measured with DIC and microscopic IR camera. Two kinds of heating techniques of resistive and hot plate heating are developed and compared. The elastic modulus was independent of the strain rate and temperature, but the inelastic mechanical response was clearly rate sensitive. The yield strength and the ultimate tensile strength increased with the strain rate but decreased with the temperature.