Development of aluminum alloy overhead line structure

Seismic imaging of transmission overhead line structure foundations

Mechanical evaluation of aluminum alloy ring fixator.

OBJECTIVE To test the homemade ring fixator as a tool for correction of bony deformity. MATERIAL AND METHOD The authors developed an aluminum alloy ring fixator and tested it to find out the accuracy of manufacturing and strength of the ring systems under axial load with the Roundness Testing Machine and Lloyd Universal Testing Machine. RESULTS The mean diameter of the twenty five-drill hol...

Flexible Forming of Thin Aluminum Alloy Sheets

Flexible forming is a sheet metal forming process with the application of soft material tooling. In this study, flexible (silicone rubber, SR, and styrene butadiene rubber, SBR) and semi-rigid (polyamide 66, PA) polymeric materials were adopted to make several upper dies which were used in combination with aluminium lower dies. Stamping operations were performed on a thin aluminium alloy sheet ...

The piezoresistance of aluminum alloy interconnect structures

The effects of applied strain on the resistivity of Al thin film metallization interconnects have been measured with a novel methodology that uses thermal expansion mismatch to produce the strain. The interconnect volumetric strain is induced by thermal cycling of passivated and unpassivated interconnects between '70 and 373 K. The coefficient of piezoresistivity, defined as dr/dev, where r5res...

Cast Aluminum Alloy for High Temperature Applications

Originally developed by NASA as high performance piston alloys to meet U.S. automotive legislation requiring low exhaust emission, the novel NASA alloys now offer dramatic increase in tensile strength for many other applications at elevated temperatures from 450°F (232°C) to about 750°F (400°C). It is an ideal low cost material for cast automotive components such as pistons, cylinder heads, cyl...