报导工业纯铝和硬铝在常规低周疲劳和低周冲击疲劳载荷下的力学行为，包括应力应变回线、循环硬（软）化及疲劳寿命等。试验结果表明，硬铝既是一种高强度轻金属材料，同时也是一种疲劳脆性材料，过载能力偏低，在构件设计和使用中需予注意。 The mechanical behaviors of industrial pure aluminum and duralumin under normal low cycle fatigue and low cycle impact fatigue loading are reported, including stress-strain loop, cyclic hard (soft) and fatigue life. The experimental results show that the hard aluminum is not only a kind of high-strength light metal, but also a kind of fatigue brittle material with low overload capacity. Attention should be paid to the design and use of the components.