The high entropy alloy (HEA) filler used during the fabrication method determines reliability of HEAs for steel-aluminum dissimilar configuration. have a direct impact on formation intermetallic compounds (IMC) formed by interaction iron (Fe) and aluminum (Al), influence size joint’s zone. A novel welding process Fe-Al joints was developed to prevent development brittle iron-aluminum interface....

Aluminum-based metal matrix composite (MMC) materials are used in the design of ground transportation vehicles and aircraft. Compared with conventional, unreinforced alloys, composite materials usually exhibit higher strength, both at ambient and elevated temperatures, as well as good fatigue strength and wear resistance. MMCs could be produced by variety of methods such as Stir cast, Liquid In...

Caustic stress corrosion cracking has only been superficially examined in aluminum alloys. In caustic (basic) environments, the inherent, protective oxide layer becomes soluble on aluminum and allows for further degradation. The purpose of this study is to observe the effect of a strong base solution (sodium, hydroxide, sodium hypochlorite, sodium silicate, pH ~12) on the strength and stress-st...

Sandwich structures used to lightweight telescope mirrors result in subsurface pore or cell-induced surface deformation (called quilting), the unsupported sub-surface regions, during diamond turning of optical surface. An alternative sandwich structure is metal foams made by melt route which have a monolithic porous-nonporous interface naturally formed gravitationally induced drainage effect. T...

This paper introduces an experimental technique to investigate dynamic friction characteristics of sliding interfaces at normal pressures up to 125 MPa, slip speeds up to 15 m/s and slip distances of approximately 10 mm. This new apparatus involves a novel modification of the conventional torsional Kolsky bar apparatus employed extensively in the past to investigate high-strain-rate behavior of...