A forming method used by other industries and perfected for auto applications by General Motors Corp. may allow the auto maker to eventually begin widespread use of aluminum closure panels – a changeover that could be a crushing blow to the steel industry. "It’s not a silver bullet," Paul Krajewski, GM staff researcher and lab group manager, tells Ward's. "But it can make aluminum as formable as steel under certain conditions, and that’s what this heat treatment does. It’s a local heat ...

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