A6061アルミニウム合金板の成形性支配因子に関する考察

概要

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The press-forming tests of the precipitate-hardening aluminum sheets, A 6061, were conducted under various preaging, quenching and full annealing conditions, as the preliminary test of the thermomechanical treatment to determine the coexistence of the strengthening of the sheet and the improvement of the press-formability. The main results are summarized as follows : (1) The stress-strain relations of the materials in which the precipitation has not yet developed follow the saturated law. Consequently, this characteristic must be taken into account in evaluating the press-formability, a new factor of ductility n^* is proposed. (2) The n^* is appropriate in the evaluation of the stretchability of any aluminum ally sheet containing the materials tested so far. (3) Deep-drawability, using the hemispherical punch, correlates n^* under the consideration of r. (4) For deep-drawability, using the flat-headed punch, n^* is the indicator of sudden change, and r is the main factor.
1989-04-25