铝锂合金强化和韧化的特殊机理

来源期刊：中国有色金属学报1997年第1期

论文作者：陈铮 王永欣 徐磊

文章页码：56 - 61

关键词：铝锂合金 强韧化 断裂特征 力学行为

Key words：aluminum-lithium alloy strengthening and toughening fracture feature mechanical behavior

摘    要：以未再结晶晶粒结构的 2090+Ce 铝锂合金板材为对象，从铝锂合金与普通铝合金力学行为的主要差别入手，以揭示经典理论难以解释的现象为目的，重点研究了该合金独有的精细结构与断裂特征的内在联系，以及力学行为对之的响应关系。涉及到室温拉伸行为，疲劳长、短裂纹扩展特性，断裂韧性，光滑疲劳极限。

Abstract: The material studied was aluminum-lithium alloy 2090+Ce with pancake-shape uncrystallized grains. The difference in the mechanical behavior between aluminum-lithium alloy and traditional aluminum alloy was researched so as to reveal the special phenomena which are difficult to be explained by the traditional theory. Specific emphasis has been placed on the relationship among microstructure, fractographic feature and mechanical behavior for aluminum-lithium alloy. The tensile behavior at room temperature, the growth behavior of long and short fatigue cracks, fracture toughness and fatigue limit of the studied alloy were concerned with.