The stress on the jetliner supply chain is well documented as Airbus and Boeing push to ever-higher single-aisle production rates. Pain points have emerged in surprising areas of the supply chain, including forgings and special processes. The most acute may be investment castings. The investment casting process is used for a variety of strategic components on aircraft—from structural components to wheels to engine components and turbine blades. In the investment casting process, a wax ...

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