【摘要】 研究了微量Ag,Mg对Al-Cu-Li合金显微组织和时效特性的影响。结果表明:单独加Ag对Al-Cu-Li系2197合金的固溶强化效果很小,但有较强的时效强化作用,Ag含量不同,时效强化效果也不同;Ag,Mg共同加入提高了T1相(Al2CuLi)的析出速率和析出密度,使合金具有较大的固溶强化效果及最强烈的时效响应和时效强化效果。Ag,Mg的添加对合金的不同影响可通过溶质原子与空位、溶质原子与溶质原子之间的相互作用来解释。更多还原

【Abstract】 The effect of Ag, Mg on microstructure and ageing characteristics of Al-Cu-L(i2197)alloy has been studied. Independent small addition of Ag to the alloy enhances peakaging strength to a larger extent and the different aging-strengthening effect is accompanied by the different concentration of Ag. 2197 alloy has the largest solution-strengthening effect and the strongest aging response and aging- strengthening effect by the combined addition of Ag and Mg. Independent and combined roles of small addition Ag and Mg can be interpreted in terms of the solute-vacance interaction and solute-solute atom interaction.更多还原