A2024アルミニウム合金板の加工熱処理による成形性向上と強化の両立

概要

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Using the precipitation-hardening aluminum alloy sheet A 2024, it has been clarified that both the improvements of press-formability and strengthening can by satisfied simultaneously by means of thermomechanical treatment (TMT). The stress-strain curves of TMT. I where deformation or forming is followed by aging, i.e., the combined curves of strain and age hardening were gained by the uniaxial and balanced biaxial tension tests. Furthermore, the combined hardening curves could be expressed by H_v=H_v (strain, aging temperature, aging time), for various aging conditions. In the case of the deep-drawing by a flat-headed punch followed by aging i.e. TMT. I, the aging of 210℃×10/60min is most preferable. The combined hardening distribution H_v (X, Y, Z, aging condition) of the drawn cup could be estimated by using simultaneously the above stated H_v (strain, aging condition) and the equivalent strain distribution measured or calculated from the formed cup.
1986-08-25