摘要
从宏观性能与微观结构角度研究了２０９０＋Ｃｅ铝锂合金的时效过程中的强化和韧化机制。１５０℃时效过程中，延长时效时间可加强层内与层间两种强化机制的作用，从而使合金强度升高，塑性下降。经１５０℃时效和１６３℃时效的合金具有相同水平的拉伸性能，而前者韧性更优，窄的ＰＦＺ和无稳定相存在的晶界以及塑变迹象明显的断口，是其具有高Ｋｃ的主要机制。
The strengthening and toughening mechanisms in the aging process of alloy 2090+Ce were systematically investigated. The results show that the strengthening effectes in and between laminates increase along with prolonging of aging time at 150℃, leading to the increase of strength and the decrease of the plasticity of the alloy. The aging process at 150℃, compared to the one at 163℃, enables the alloy to reach the same strength, but much higher ductility level, due to its shorter PFZ distance, grain boundary free of stable phases, and fracture surface featured by plastic deformation.
出处
《稀有金属》
EI
CAS
CSCD
北大核心
1998年第6期406-409,共4页
Chinese Journal of Rare Metals
基金
国家自然科学基金
航空科学基金
航空新材料预研资助项目
关键词
铝锂合金
层内
层间
强化机制
韧化机制
Al Li alloy, in laminates, between laminates, Strengthening mechanism, Toughening mechanism
