通过拉伸测试、显微硬度测试、透射电镜(TEM)及扫描电镜(SEM)分析等手段研究了不同热处理制度对2519铝合金组织、力学性能及抗晶间腐蚀性能的影响.结果表明,与T6状态相比,2519合金经T8处理后,合金的强度、硬度提高,合金峰值时效时间提前,但塑性降低,同时,晶内沉淀析出的θ′相数目增加、尺寸减小、分布均匀,沿晶界析出的θ′(θ)相数量减少,且不连续分布,无沉淀带变窄.T8处理提高了合金峰值时效态抗晶间腐蚀的能力.
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