【摘要】 阐述了铝合金在低温下的力学性能随温度的变化规律 :在低温下拉伸性能提高、韧性改善、疲劳强度增加 ,且介质不同铝合金表现出不同的力学性能。并分析了这些力学性能变化规律的机理 ,同时对在极低温下某些铝合金锯齿变形的现象、特征、形成机理以及对力学性能的影响作了分析说明。更多还原

【Abstract】 This paper reviews the mechanical properties of aluminum alloys at cryogenic temperatures. Their tensile strength,toughness and fatigue strength are improved and they exhibit different mechanical properties within different media at cryogenic temperatures.Mechanism of temperature dependence of mechanical properties is analyzed and characteristics,forming mechanism of serrated deformation and its influence on mechanical properties are introduced for some aluminum alloys.更多还原