Zn-Al共析系合金の液圧円バルジ変形および超塑性関連領域

概要

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A circular hydraulic bulge test of Zn-Al eutectoid-base alloys having various initial grain-sizes has been carried out at different temperatures. The experiment has been performed to find out the region of a combination of temperature, stress and grain-size, which is closely related to superplasticity, where a large deformation arises under an equi-biaxial tensile stress condition. Then the superplasticity-related region obtained has been compared with that obtained by a uniaxial tension test. It appears that the extent of grain-size where superplasticity arises under the biaxial stress is wider than that observed under the uniaxial stress .The values of the bulge factor are always larger than 1.0 within the superplasticity-related region. The microstructure near a polar region of the bulge after deformation is very similar to that observed in the tension test.
一般社団法人日本機械学会の論文
1986-05-25