In view of developing a physics-based constitutive material model for AA7075-T651, the mechanical behavior and microstructure evolution has been studied through compression tests using Gleeble thermo-mechanical simulator. The were performed at wide range temperatures (room temperature (RT), 100, 200, 300, 400 500 °C) with two constant strain rates (0.01 1 s-1). true stress-strain curves depicte...

recent developments in nanostructured products draw considerable attention to ultrafine grained materials. these materials are normally manufactured by different severe plastic deformation (spd) methods. in the present study, analytical models and finite element method (fem) are used to calculate strain imposed to a specimen that was deformed by equal channel angular pressing (ecap). in additio...

the kaolinitic clays have been exploited for more than a hundred years, in the western part of the charentes basin, france, and belong to a paleo-deltaic network. the recent deposits are relatively richer in alumina in comparison with the older ones. the genesis of the kaolin deposits of the charentes basin follows simple geological rules, but their detailed geometry has a great complexity, rei...

background: accurate voxel phantom is needed for dosimetric simulation in radiation therapy for malignant tumors in female pelvic region. however, most of the existing voxel phantoms are constructed on the basis of caucasian or non-chinese population. materials and methods: a computational framework for constructing female pelvic voxel phantom for radiation dosimetry was performed based on chin...

Discrete-event simulation based optimization is the process of finding the optimum design of a stochastic system when the performance measure(s) could only be estimated via simulation. Randomness in simulation outputs often challenges the correct selection of the optimum. We propose an algorithm that merges Ranking and Selection procedures with a large class of random search methods for continu...

High strength steels are widely used for structural applications, where a combination of excellent and ductile-to-brittle transition (DBT) properties required. However, such high toughness can be deteriorated in the heat affected zone (HAZ) after welding. This work aims to develop relationship between microstructure cleavage fracture most brittle areas welded S690 structures: coarse-grained int...