通过金相显微、透射电子显微、电子拉伸和剥落腐蚀实验研究了7050铝合金板材蠕变时效与人工时效的微结构及性能.结果表明:蠕变时效过程中施加的应力使板材不断产生变形,为η ′析出相提供了大量形核点,析出相尺寸更加细小,特别是晶界无沉淀带较人工时效明显变窄,晶界析出相不连续.与人工时效相比,蠕变时效试样的抗拉强度和抗剥落腐蚀性能略有提高.
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