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Temperature evolution during fatigue damage
DOI:10.1016/j.intermet.2004.07.032.png)
Abstract
En 中文
Fatigue damage is closely related to plastic deformation and heat dissipation, which affect the temperature of the materials. In the current research. a state-of-the-art infrared-thermography camera has been used as a nondestructive evaluation (NDE) method to investigate the temperature evolutions in both crystalline and amorphous materials during fatigue experiments. Fatigue-damage processes, such as the Luders band growth in reactor-pressure-vessel (RPV) steels and shear-band evolution in bulk metallic glasses (BMGs), have been observed in situ and analyzed by thermography. Theoretical models combining fracture mechanics and thermodynamics have been formulated to quantify the temperature-evolution processes during fatigue. specifically, the plastic work in RPV steel during low-cycle fatigue has been calculated and the fatigue life has been predicted from the observed temperature. The prediction matches the experimental data quite well. (c) 2004 Elsevier Ltd. All rights reserved.
Keywords:
glasses, metallic
mechanical properties at ambient temperature
mechanical testing
non-destructive evaluation
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