Aerospace requirements for lighter weight, greater strength, and more precision have spawned a new generation of materials, and the processes and machines needed to convert those materials into parts. The aerospace industry has seen dramatic changes in the last 10 years in the ways it processes engine components. According to Technology Manager, Michael Hitchiner, St. Gobain Abrasives, Romulus, MI, the industry has moved away from grinding on large, complex machines to CBN-based grinding strategies for grinding nickel and cobalt-based superalloys on small, purpose-built three, four, and five-axis machines. The aerospace industry is using more special alloys to meet the requirement of high temperatures, strength, precision, and reliability. According to Cliff Mays, Sandvik Coromont, Fairlawn, NJ, "For aerospace engines, these include heat-resistant superalloys, Inconel, and Waspaloy. Plus the engine manufacturers are coming up with proprietary materials. To be ready for the next generation of materials, Sandvik maintains a four-point research program. For all emerging materials, they look at component geometry restrictions, finish, machinability, and surface integrity.