Most activities in the world are constrained by the laws of nature, including metalforming. One must pay some type of price to receive a specific benefit. Last month's column described how higher material strength generates higher elastic stresses and an increase in springback. Correcting springback to maintain print dimensional specifications becomes more difficult and expensive. Even worse, residual or trapped elastic stresses also can increase and cause reductions in the stability and robustness of stamping dimensions during subsequent processing or in-service operations.
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