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首页> 外文期刊>Journal of Materials Engineering and Performance >Effect of Pre-aging on Stress Corrosion Cracking of Spray-formed 7075 Alloy in Retrogression and Re-aging
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Effect of Pre-aging on Stress Corrosion Cracking of Spray-formed 7075 Alloy in Retrogression and Re-aging

机译：时效对回火和再时效过程中喷射成形7075合金应力腐蚀开裂的影响

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摘要

The effects of pre-aging in retrogression and re-aging (RRA) treatment on microstructure, mechanical properties, and stress corrosion cracking (SCC) behavior of spray-formed 7075 aluminum alloy were investigated by tensile test, slow strain rate test, and transmission electron microscope. The results show that the under aging (120 degrees C for 16 h) as the pre-aging in RRA treatment can vastly improve the mechanical properties and the SCC resistance of the alloy, compared with early aging (120 degrees C for 8 h), peak aging (120 degrees C for 24 h), and over aging (120 degrees C for 32 h) treatments, the ultimate tensile strength of the alloy is 782 MPa, which is higher than that for peak aging or conventional RRA treatment; and the SCC resistance of the alloy is also excellent after RRA with under aging as pre-aging.
机译：通过拉伸试验，慢应变速率试验和透射率研究了预时效后退和再时效（RRA）处理对喷射成形7075铝合金的组织，力学性能和应力腐蚀开裂（SCC）行为的影响。电子显微镜。结果表明，与早期时效（120℃8 h）相比，在RRA处理中进行的预时效（120℃16 h）的时效处理可以极大地改善合​​金的力学性能和抗SCC性能，峰值时效（120摄氏度，持续24小时）和过时效（120摄氏度，持续32小时）处理后，合金的极限抗拉强度为782 MPa，高于峰值时效或常规RRA处理; RRA经过老化后作为预时效处理，该合金的耐SCC性也极好。

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