DIFFERENTIAL SCANNING CALORIMETRY EVALUATION OF RETROGRESSED AND RE-AGED MICROSTRUCTURES IN ALUMINUM-ALLOY 7075

被引：26

作者：

PAPAZIAN, JM

机构：

[1] Grumman Corp, Bethpage, NY, USA, Grumman Corp, Bethpage, NY, USA

来源：

MATERIALS SCIENCE AND ENGINEERING | 1986年 / 79卷 / 01期

关键词：

ALUMINUM AND ALLOYS - Heat Treatment - CALORIMETRY;

D O I：

10.1016/0025-5416(86)90391-5

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Differential scanning calorimetry (DSC) experiments were performed to evaluate the effects of retrogression and re-aging heat treatments on the precipitate microstructures of aluminum alloy 7075 in the T651 temper condition. The retrogression heat treatments varied from 15 to 240s at temperatures between 220 and 270 degree C; the re-aging treatment was 24 h at 120 degree C. DSC analyses showed that both retrogression treatments and retrogression and re-aging treatments caused significant changes in the precipitate microstructures. It was found that the retrogression treatments caused precipitate dissolution and overaging and that the progress of this treatment could be accurately evaluated by DSC analysis. The final microstructure was found to be highly dependent on the retrogression treatment.

引用

页码：97 / 104

页数：8

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