Deformation mechanism of tension of 2024Al alloy at semi-solid state

来源期刊：中国有色金属学报(英文版)2000年第5期

论文作者：杜之明 罗守靖 孙家宽

文章页码：666 - 670

Key words：semi-solid; tension; 2024Al; grain relative sliding

Abstract: The mechanism of the tension and fracture of 2024Al alloy at semi-solid were theoretically and experimentally investigated, with the isothermal tension of 2024Al alloy at semi-solid state as an example. Results of theoretical and experimental analysis show that the tensile deformation of 2024Al alloy at semi-solid state is achieved by the relative sliding of grains and the deformation of liquid membrane under tensile stress. The relative sliding of grains is mainly accommodated by the nucleation and growth of cavities under tensile stress. A cavity will nucleate in the region with the largest hydrostatic stress at first and then grow along preferential grain boundaries, leading to the final fracture of specimen along grain boundaries.