In-situ TEM straining experiments were performed on pure copper to investigate the dislocation activity under heavy ion irradiation and high applied stress levels. The unpinning of dislocations from defects followed by glide was observed at levels just below critical for without irradiation. This phenomenon, unraveled first time in copper, has been statistically analyzed using digital image pro...

A temperature and rate-dependent crystal plasticity framework has been used to examine the temperature sensitivity of stress relaxation, creep and load shedding in model Ti-6Al polycrystal behaviour under dwell fatigue conditions. A temperature close to 120°C is found to lead to the strongest stress redistribution and load shedding, resulting from the coupling between crystallographic slip rate...

Using the Markov chain Monte Carlo (MCMC) inversion technique of Mullet et al. (2015), we reassess the validity of the conventionally accepted values of the grain size exponent of diffusion creep in olivine aggregates. A systematic and comprehensive analysis of individual experimental runs taken from three widely cited studies reveals that these data do not tightly constrain the grain size expo...

[1] We present a new statistical framework to analyze rock deformation data and determine a corresponding flow law and its uncertainty. All experimental uncertainties, including inter-run bias, are taken into account in the new formalism. Our approach is based on Bayesian statistics and is implemented by a Markov chain Monte Carlo method. We apply this approach to published data on the subsolid...

In the present study, time-dependent plastic deformation (creep) response of magnesium/carbon nanotube (CNT) nanocomposites containing 0.25, 0.5, and 0.75 vol% CNTs is investigated through instrumented indentation tests against monolithic pure magnesium. The Mg-CNT were synthesized via powder metallurgy coupled with microwave sintering followed by hot extrusion. Indentation creep performed at 2...

In this study, depth-sensing indentation creep response of cast and additively manufactured (laser powder bed fusion) NiTi alloys in heat-treated conditions have been investigated at ambient temperature. Indentation tests were evaluated with the help a dual-stage approach comprising loading segment subsequent constant load-holding stage an unloading phase afterward. The investigation was carrie...

Kink formation and kink strengthening mechanisms were examined in the polycrystalline Ti3SiC2 MAX phase prepared by a reaction sintering process using spark-plasma-sintering machine. The creep behavior tested compression at 1200°C showed two deformation regions depending on applied stresses; stresses lower than 120 MPa, stress exponent n exhibited ≈1.8, whereas higher stresses, it ≥ 6. can be a...

In the Present study, attempt will be made to propose a new method for prediction of long-term essential creep of concrete utilizing some short-term creep tests under high temperature. To do so, regarding the similarities between essential creep of concrete and creep in viscoelastic materials, the time–temperature equivalence relation in viscoelastic materials is evaluated for concrete. This re...

background: prevalence of recurrent shoulder dislocation in patients taking tramadol has not been studiedyet so, this study aims to study the recurrent shoulder dislocation following tramadol induced seizure. methods: in this cross-sectional study, 205 patients with recurrent shoulder dislocation complaints (2 or more) referred to shafa orthopedic and iranmehr hospitals tehran, iran, from octob...