Wire arc additive manufacturing (WAAM) technique is a cost-competitive and efficient technology to produce large structure components in industry domains. Mechanical properties are mainly dominated by the microstructure of the components, which is deeply affected by the molten pool size. In this work, to investigate the effect of the molten pool size on microstructure and mechanical properties ...

The microstructure and tensile properties of Ti-6Al-6V-2Sn alloy heat-treated at different solution aging temperatures has been systematically investigated. Specimens were solution-treated 970 °C (above the β transus) 920 (below transus), respectively, followed by water quenching. When is quenched from °C, α’ (hcp) α˝ (orthorhombic) martensite phases co-exist in microstructure. it α´ phase does...

conclusions pci was accompanied by some improvement in left atrial deformation indices as assessed by tissue doppler imaging. revascularization can, therefore, improve patient outcome. results regarding changes in left trial functional parameters after pci, those such as the strain of the septal wall and the anterior and inferior walls and the strain rate of the anterior and lateral walls signi...

BACKGROUND Mechanical stimulation (e.g. slow heavy loading) has proven beneficial in the rehabilitation of chronic tendinopathy, however the optimal parameters of stimulation have not been experimentally determined. In this study of mechanically stimulated human tenocytes, the influence of rest insertion and cycle number on (1) the protein and mRNA levels of type I and III collagen; (2) the mRN...

Three different alumina sources (boehmite, aluminium nitrate and α-alumina particles) 12Ce-TZP powder containing 1 wt% lanthanum oxide were used to prepare 12Ce-TZP-based alumina-toughened-zirconia (ATZ) composites. The obtained ATZs had similar density phase composition, whereas the microstructures significantly different. Alumina-particle addition gave rise a typical ATZ microstructure consis...

This research aims to analyze the microstructures and mechanical characteristics of stainless steel (SS) 316L repurposed by wire plus arc additive manufacturing (WAAM). The SS is deposited on a 316 substrate, which can be repurposed. material underwent optical microscopy, X-ray diffraction, tensile test, results indicate that it features cellular columnar dendrites at bottom equiaxial grains to...

In engineering practice, unsaturated compacted loess is often utilized as a filling material in the regions. The inevitably undergoes one-dimensional compressibility and creep deformation due to long-term effects of upper soil layers buildings. When large enough, it tends damage buildings threaten safety. this regard, properties based on incremental loading (IL) constant rate strain (CRS) metho...

background: heat stress is a common and usual problem in industries. several indices, including wet bulb globe temperature (wbgt), are used to evaluate heat stress. however, wbgt index has limitations such as high cost and response time. it is not thus suitable as a screening tool. heat strain scoring index (hssi) is also an observational-judgmental technique that has been developed for primary...

background recently, assessment of the atrial motion and deformation indices obtained via doppler myocardial imaging (dmi) has been proposed as a new method of exploring the atrial function. objective our aim was to assess the right atrial (ra) regional function using myocardial velocities, strain, and strain rate imaging (sri) and compare it with the function of the inter-atrial septum (ias) a...