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研究了时效工艺对一种高强高模Al-Li合金断裂韧性的影响.研究结果表明,时效前的预时效或预变形可促进T_1相析出,从而改善合金的断裂韧性,但在过时效状态,预时效或预变形的有利影响减弱.为获得高的断裂韧性.时效时应避免粗大晶界平衡相的析出和晶界无析出带变宽.依据组织观察结果,讨论了时效制度、微观组织和断裂韧性之间的关系.
The effect of aging process on the fracture toughness of a high strength and high modulus Al-Li alloy was studied.The results show that the pre-aging or pre-deformation before aging can promote the precipitation of T_1 phase and improve the fracture toughness of the alloy, but in the overaged state, Pre-aging or pre-deformation of the beneficial effects of weakening in order to obtain high fracture toughness aging should avoid the grain boundary equilibrium precipitation and grain boundary precipitation-free zone widened based on the results of the organization observed the aging system, microstructure and Relationship between fracture toughness.