In aerospace applications, Friction Stir Welding (FSW) has emerged as a good choice for joining aluminum. This solid-state process relies on a rotating cylindrical tool to generate enough localized heat and pressure to create a continuous weld as the tool translates through the joint. In his paper at Great Designs In Steel, Tsung-Yu Pan and co-authors from two of our national laboratories detailed a FSW variant that shows promise for AHSS. Friction Stir Spot Welding (FSSW) creates spot welds rather than a linear weld line. It has successfully been in production on aluminum components since 2003. Pan's presentation shows that it may be a good fit for AHSS too. Studies on an increasingly popular AHSS, DP 780, showed that the FSSW produced spot welds with 8-12 kN strengths, comparable with JIS standards. The bonding region showed similar microstructure and hardness to the base material. And all this comes without any attempt to optimize the materials or process.
A new method of modeling how they are created with chemical vapor deposition (CVD) could reduce the cost of carbon nanostructures used for for research and commercial applications, including advanced sensors and batteries.
BMW has already incorporated more than 10,000 3D-printed parts in the Rolls-Royce Phantom and intends to expand the use of 3D printing in its cars even more in the future. Meanwhile, Daimler has started using additive manufacturing for producing spare parts in Mercedes-Benz Trucks.
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