A series of high entropy alloys (HEAs), AlxNbTiMoV, was produced by a vacuum arc-melting method. Their microstructures and compressive mechanical behavior at room temperature were investigated. It has been found that a single solid-solution phase with a body-centered cubic (BCC) crystal structure forms in these alloys. Among these alloys, Al0.5NbTiMoV reaches the highest yield strength (1,625 M...

We consider the important problem of medium term forest planning with an integrated approach considering both harvesting and road construction decisions in the presence of uncertainty modeled as a multi-stage problem. We give strengthening methods that enable the solution of problems with many more scenarios than previously reported in the literature. Furthermore, we demonstrate that a scenario...

Until now, the nature of competitive and cooperative correlation between solid solution strengthening precipitate hardening is still uncovered, then brings great challenges in designing high-performance alloys. Here, a unified model has been developed to establish quantitative relationships among aging process, microstructure, yielding strength for nickel-based superalloy three-dimensional (3D)...

Solid solution strengthening of the unordered γ matrix phase by alloying elements is great importance during creep Ni-based superalloys, particularly at high temperatures above 1000 °C. To study role different potent solutes, we have conducted experiments on binary Ni-2X alloys (X = Mo, Re, Ta, W) °C, 1050 and 1100 °C a constant stress 20 MPa. Compared to mechanical tests below 800 where size m...

Solid solution effects on the strength of the finest nanocrystalline grain sizes are studied with molecular dynamics simulations of different Cu-based alloys. We find evidence of both solid solution strengthening and softening, with trends in strength controlled by how alloying affects the elastic modulus of the material. This behavior is consistent with a shift to collective grain boundary def...

background: the purpose of this study was to investigate the effects of two types of rehabilitation techniques, including aerobic and strengthening exercises on patients with knee rheumatoid arthritis (ra). methods: 48 male patients with knee ra were randomly assigned into 3 groups, including aerobic exercises, strengthening exercise, and control. the two first groups completed their treatment ...

Traditional material calculation methods, such as first principles and thermodynamic simulations, have accelerated the discovery of new materials. However, these methods are difficult to construct models flexibly according various target properties. And they will consume many computational resources accuracy their predictions is not so high. In last decade, data-driven machine learning techniqu...

Solid solution strengthening (SSS) is one of the main contributions to desired tensile properties nickel-based superalloys for turbine blades and disks. The value SSS can be calculated by using Fleischer’s Labusch’s theories, while model parameters are incorporated without fitting experimental data complex alloys. In this work, four diffusion multiples consisting multicomponent alloys pure Ni p...