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[en] Small-scale mechanical testing on irradiated materials is gaining popularity in the nuclear materials community due to the fact that mechanical property changes can be evaluated from shallowly ion-beam-irradiated materials as well as from small volumes of reactor-irradiated components. While the obvious benefits of accelerated research and reduction of radiation exposure are gained through these methods, these methods also target specific microstructural areas of interest. This paper presents a summary of current techniques that are utilized and outlines a path towards a more thorough understanding of small volume testing on irradiated materials.
[en] Reliability is a key concern of all machines that must maintain good operating conditions. There are many mechanisms of damage that lead to the failure of the system. In this presentation, the tribological approach to performing accelerated wear test of mechanical components is discussed. In order to accelerate the wear effect the mechanism of wear must first be understood. The mechanisms of wear for various applications are presented. Also, the use of Stribeck curve and Archard's wear equation in determining the acceleration parameters are proposed. By selecting the proper speed, load, and lubrication condition in the wear test, the failure due to wear can be accelerated
[en] Shape memory effect is the most effectively performed on NiTi shape memory alloy. The shape memory effect phenomena are related to solid-state phase transformation so the atomic neighbourhood orientation keeps during the phase transformation process. Stress and energy release during the phase transformation have effects on orientations of the atomic structure. However, if SMAs are exposure to repeated regular deforming and shape recovery cyclings, this will eventually cause some loses in their shape memory recoverability. In this study, the shape memory effect loss ratio of Ni46.84Ti53.16 (at%) alloy was investigated by systematic stress-strain mechanical tests and significant shifts was recorded on shape recovery ratios. (paper)