粉末冶金材料的变形特征

Deformation of Powder Metallurgy Materials

摘要:

应用作者新近提出的多孔材料的屈服准则，研究了粉末冶金材料在塑性加工过程中的致密化、加工硬化和泊松比及复压过程中的力学问题。结果指出，粉末冶金材料在塑性加工过程中的致密化、加工硬化和泊松比等可以由作者曾给出的屈服准则导出；复压过程中粉末冶金材料的致密化和加工硬化要比单向压缩过程中相应量的变化快得多。

Abstract:

The novel yielding criterion for porous materials is employed to study the densification, workhardening and poisson's ratio of sintered materials during plastic processings. Relevant functions under uniaxial compressive stress stste are derived for the abobve factors the experimental data in literature are cited to test the predictions. Besides, recompressing process is also researched.