【摘要】 为揭示金属材料抵抗继续变形的能力,采用理论分析和实验的方法,按照GB/T 5028―2008国标测定了6061铝合金板材形变硬化指数n.通过单向拉伸试验,揭示了6061铝合金板塑性变形硬化曲线规律,并采用Matlab软件编程,最小二乘法线性回归拟合计算确定硬化指数、强度系数.研究结果表明:应变硬化指数为幂指数函数,采用Matlab软件编程线性回归拟合计算极大的提高了研究工作效率.更多还原

【Abstract】 In order to reveal the ability of deformation strengthening about metallic materials,the theoretical analysis and experiments are used.The strain hardening index of 6061 aluminum alloy sheet is determined according to GB/T 5028 – 2008.Plastic deformation hardening curve that obtained by the tensile test is exponential function curve.Hardening exponent and the strength coefficient are fitted with the least square method using Matlab software.The result of study shows that the strain hardening index will greatly improve the work efficiency in the forming process of cold deformation of metals and processing of raw materials,the formulation of machining process,and processing forming process of metal cold deformation.更多还原