Deformation twinning from grain boundaries is often observed in face-centered cubic metals with low stacking fault energy. One of the possible factors that contribute to twinning origination from grain boundaries is the intergranular interactions during deformation. Nonetheless, the influence of mechanical interaction among grains on twin evolution has not been fully understood. In spite of ext...

The mechanical response and microstructure evolution in a rolled AZ31B magnesium alloy were experimentally characterized using companion thin-walled tubular specimens under free-end monotonic torsion. made with their axes along the normal direction of plate. shear stress-shear strain shows subtle sigmodal shape that is composed four distinctive stages hardening. Basal slips tension twinning are...

In this study, the field measurement was conducted on twin shield tunnelling in a section of Hangzhou Metro Line 6, where surface deformation caused by silty sand obtained. The law and applicability twin-line Peck formula silt area were analyzed. relationship between cutterhead torque identified. Furthermore, differences soft soil discussed. results show that settlement process is faster than h...

An optimization technique is coupled with crystal plasticity based finite element (CPFE) computations to aid the microstructural design of a wrought magnesium alloy for improved strength and ductility. The initial microstructure consists of a collection of sub-micron sized grains containing deformation twins. The variables used in the simulations are crystallographic texture, and twin spacing w...

The high-rate sensitivity of nanostructured metallic materials demonstrated in the recent literature is related to the predominance of thermally activated deformation mechanisms favoured by a large density of internal interfaces. Here we report time-resolved high-resolution electron transmission microscopy creep tests on thin nanograined films using on-chip nanomechanical testing. Tests are per...

On the basis of the elastic mechanics theories, heat transfer theories, and CAE, the non-uniform temperature distribution was studied, Mises stress and deformation distribution of 3D twin-spirals scroll plates was presented. The Mises stress and deformation of scroll plates induced by non-uniform temperature field and gas pressure was investigated. Orbiting and fixed scrolls were engaged with e...