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The structural heterogeneity of a polycrystalline Ni subjected to dynamic plastic deformation to a strain of 2.3 was characterized, and its influence on the structural coarsening behaviour during post annealing was investigated. Structural heterogeneity on the large scale manifests itself by formation of two types of layers: low misoriented regions (LMRs) and highly misoriented regions (HMRs). ...

The hot compression tests were carried on X45CrNiW189 valve steel (X45) in the temperature range of 1000– 1200 °C and the strain rate range of 0.004 – 0.5 s-1 in order to study the high temperature softening behavior of this steel. For the exact prediction of flow stress, the effective stress-effective strain curves were obtained from experiments under various conditions. On the basis of experi...

Ring-shaped superfluids with weak links provide a perfect environment for studying persistent currents and dynamic stirring protocols. Here, we investigate the effects of weak-link system on dipolar supersolids. By calculating ground-state energy at fixed angular momenta, find that metastable may exist in supersolid phase near superfluid transition point. When link rapidly enough, show vortices...

A two-step strain-induced melt activation (TS-SIMA) process that omits the cold working step of the traditional strain-induced melt activation (SIMA) process is proposed for 6066 Al-Mg-Si alloy to obtain fine, globular, and uniform grains with a short-duration salt bath. The results show that increasing the salt bath temperature and duration leads to a high liquid phase fraction and a high degr...

As a fundamental technology for the design and operation of process plants, simulation has been applied through different simulation tools. To perform complex simulation tasks in a technically and economically justified manner, it is sometimes necessary to integrate some of these tools to exploit their strengths. In this work, a “simulation framework” approach is proposed towards systematic sup...

[1] Lithospheric shear localization, as occurs in the formation of tectonic plate boundaries, is often associated with diminished grain size (e.g., mylonites). Grain size reduction is typically attributed to dynamic recrystallization; however, theoretical models of shear localization arising from this hypothesis are problematic because (1) they require the simultaneous action of two creep mecha...

A mesoscale model is developed by integrating the rate theory and phase-field models and is used to study the fission-induced recrystallization in U-7Mo alloy. The rate theory model is used to predict the dislocation density and the critical size and density of the recrystallized nuclei due to irradiation. The predicted fission rate and temperature dependences of the dislocation density are in ...

Recrystallization kinetics and two critical temperatures—the non-recrystallization temperature TNR the static recrystallization TSRCT—of five Nb, Ti, V microalloyed steel grades are evaluated. The experimental examination is realized by employing isothermal double-hit compression tests continuous hot torsion tests, both performed on a Gleeble® 3800 thermo-mechanical simulator. results used for ...

[1] The microstructures of sheared lherzolite xenoliths from South African kimberlites are investigated using new microstructural analysis techniques and new rheological data. By applying electron backscatter diffraction (EBSD) methods and the M-index technique for quantifying the strength of lattice preferred orientation (LPO), it is demonstrated that olivine and orthopyroxene, after an initia...