非熱処理形アルミニウム合金板のひずみ硬化則に関する考察

概要

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The strain-hardening characteristics of 28 lots of non-heat-treatable]e aluminum alloy sheets (containing A1000, A3000 and 5000 series) were studied mainly under equi-biaxial tension. The following was clarified: (i) To evaluate the press-formability, the equi-biaxial test is more applicable than the uniaxial test, particularly, for hard metal; (ii) The stress-strain relation could be relatively accurately expressed by one of the 3 representations of strain-hardening laws, that is, the conventional power law (1), the power law containing the initial stress (2) and the saturation stress law (3), from zero strain to limit strain for all materials tested; (iii) The ratio of equi-biaxial limit strain to uniaxial limit strain was closely related with this type of the law. (iv) The stress-strain relation of commercially-pure aluminum was represented by the law (1). The law (2) holds for harder material, and the law (3) holds for the material with higher Mg contents.
一般社団法人日本機械学会の論文
1986-05-25