In the experiment, length of crack, which had started from a notch hole, was measured by(1) During a strain controlled low cycle fatigue test at 5cpm, the rate of crack propagation to be opposite of that of tensile ductility. The period of crack initiation becomes shorter as a temperature increases.initiated in the vicinity of a main crack tip. The main crack propagates rather rapidly by coalescing these micro cracks.Temperature dependence of the rate of crack propagation is effectively influenced by the change of test frequency.(3) The increase in the rate of crack propagation due to coalescing process is estimated qualitatively with the assumption that the micro cracks prohibit the decrease of ductility of a material in the vicinity of a main crack tip.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.