Wrought nickel-based Alloy 825 is widely used in the oil and gas industries, attributed to its high strength at temperatures up 540 °C. However, differences mechanical properties arise finished components due variations both grain size dislocation density. Numerous experimental studies of strengthening mechanisms have been reported many models developed predict under thermomechanical processing...

Ti-Zr-Hf-Nb-Ta system refractory high-entropy alloys (RHEAs) exhibits outstanding tensile ductility in room temperature. However, the moderate yield strength of them is insufficient. In this work, Fe element with small atomic radius was added into a non-equiatomic RHEA for furtherly improving strength. As result, modified as high ~970 MPa, while retains considerable fracture train ~17.5%. Hf 2 ...

In the last years, attention to seismic strengthening of existing buildings has increasingly grown, especially since a huge number national incentives been allocated for deep renovation building stock. Various research pushed toward new solutions suitable account entire life cycle retrofit solution and that would overcome main barriers renovation, which are, example, need relocate inhabitants. ...

High entropy alloys (HEA) represent a class of materials with promising properties, such as high strength and ductility, radiation damage tolerance, etc. At the same time, combinatorially large variety compositions complex structure render them quite hard to study using conventional methods. In this work, we present computationally efficient methodology based on ab initio calculations within co...

Addition of Mo to the face-centered cubic (fcc) NiCoCrFe base alloy is an attractive method for improving solid-solution strengthening high-entropy alloys (HEAs). However, low solubility in equiatomic limits implementation. In this study, we used thermodynamic and ab initio calculations develop off-equiatomic NiCoCrFe-based HEA with content up 11.11 at%. Thermodynamic phase diagrams were constr...

The use of heavier trucks demanded upgrading of a twenty-seven year old bridge in Winnipeg, Manitoba, Canada. Analysis of the precast prestressed concrete girders using the current AASHTO Code indicates a deficiency in the shear capacity. Shear strengthening using Carbon Fibre R_einforced Polymer (CFRP) sheets provides a low-cost solution by increasing the speed of construction and reducing tra...

strategies of strengthening family foundation mohaddesi h , yusofi m* received: 22 april, 2010 accepted: 27 july, 2010 abstract background & aims: family is the first basis for psychosomatic growth and socialization of individuals in a community. family members who are uninformed or reckless about their rights and responsibilities will make a field for different psychosocial damages such as vio...

research in nanotechnology in the petroleum industry is advancing rapidly and an enormous progress in the application of nanotechnology in this area is to be expected. in particular, adding nanoparticles to fluids may drastically benefit enhanced oil recovery and improve well drilling, by changing the properties of the fluid, rocks wettability alteration, advanced drag reduction, strengthening ...