一、前言 金属材料的机械性能通常指材料在外力或能量作用下所表现的行为,如弹性、塑性、断裂等。就其广义而言,还应包括温度、环境介质、加载速度、应力状态等因素与外力或能量共同作用下所表现的行为。 人们在长期的生产和科学实验中,从机 I. Introduction The mechanical properties of metal materials usually refers to the material under the action of external force or energy behavior, such as elasticity, plasticity, fracture and so on. In its broad sense, it should also include the temperature, environmental media, loading speed, stress state and other factors and external forces or energy under the joint action of the behavior. People in the long-term production and scientific experiments, from the machine