Bonding Process Joins Dissimilar Metals A new method of creating an extremely strong bond between lightweight aluminum and ultra-high-strength steel could help auto makers achieve U.S. corporate average fuel economy of 54.5 mpg (4.3 L/100 km) by 2025. The technique, called friction-bit joining, uses a small, consumable bit to create a solid-state joint between metals. The latest development in the process successfully bonds lightweight aluminum with cast iron by inserting a thin layer ...

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