In this study, the effect of upsetting-extrusion-upsetting (UEU) on microstructure an Mg-9Gd-4Y-2Zn-0.5Zr alloy and dynamic recrystallization (DRX) was investigated. The results showed that after UEU, DRX occurred in alloy. Namely, grain refinement at cross-sectional edges UEU specimens significant, with size being refined from 8.27 µm necking region to 6.57 µm. Grain is mainly caused by where ...

The evolution of the communication and computation systems enables user equipment (UE) to handle tremendous transmission data. However, high-speed data processing also makes UEs release heat might burn chips inside devices. thermal issue would be more critical in millimeter-wave communications. massive antenna arrays radio frequency modules not only drain UE battery but 3GPP identified suppress...

The recent development of high-capacity disordered-rocksalt (DRX) cathodes has ushered in new opportunities toward low-cost and high-energy Li-ion batteries. In particular, Mn-based DRX materials which Mn serves as the primary redox-active transition metal have shown most promising performance, with capacity specific energy surpassing those more established cathode materials. However, there rem...

The hypoeutectic composite material composed of BCC phase and in situ precipitated Ti5Si3 was prepared by adding Si into MoNbTaTiV high-entropy alloy. obvious oriented formed eutectic with the inter-dendritic area, which leads to excellent properties composite. alloy exhibits ultra-high yield stress 718 MPa at 1200 °C compression plasticity. After reaching maximum strength, dynamic recovery (DR...

High-temperature forming behaviors of a 7046-aluminum alloy were investigated by hot compression experiments. The microstructural evolution features with the changes in deformation parameters dissected. Results indicated formation massive dislocation clusters/cells and subgrains through intense DRV mechanism at low temperature. With an increase temperature, annihilation dislocations coarsening ...

Um arranjo de nanotubos de óxido de titânio alinhados verticalmente foi gerado com sucesso na superfície de um substrato de titânio pela técnica de anodização. Os nanotubos foram caracterizados por microscopia eletrônica de varredura (MEV), difratometria de raios X de pó (DRX), espectroscopia Raman e espectroscopia de fotoluminescência. Os resultados indicam que o tamanho dos nanotubos de óxido...

This section describes a discrete event simulation model for UMTS DRX mechanism. According to the ETSI packet traffic model described in Section 3, a packet service session consists of Npc packet calls. Each of these packet calls in turn contains a sequence of Np packets. Npc and Np are assumed to be geometric random variables with mean μpc and μp, respectively. This assumption can easily be re...