Materials

A team of engineers from several California colleges has developed and tested a type of steel with a record-breaking ability to withstand impacts without permanent deformation. The new alloy, named SAM2X5-630, could be used in applications from drills to body armor to meteor-resistant casings for satellites. The material is an amorphous steel alloy, a subclass of steel alloys made of arrangements of atoms that deviate from steel’s classical crystal-like structure, where iron atoms occupy specific locations.

The aircraft industry now has the means to precisely machine multilayer material combinations. These combinations, called stack materials, include several thin layers of different materials. Aircraft skin, for example, could consist of titanium, aluminum and composite layers, according to Lee Coleman, automation division manager for Suhner Manufacturing Inc., Rome, Ga.

As aerospace materials have evolved, machine shops have had to use new tools and technologies in order to process them. The June 2016 CTE cover story delves into delamination of composites and other workpiece problems that challenge aerospace parts makers.