Abstract
An aluminum alloy (Al-Zn-Mg-Cu) subjected to deep cryogenic treatment (DCT) was systematically investigated. The results show that a DCT-induced phase transformation varies the microstructures and affects the mechanical properties of the Al alloy. Both Guinier-Preston (GP) zones and a metastable η′ phase were observed by high-resolution transmission electron microscopy. The phenomenon of the second precipitation of the GP zones in samples subjected to DCT after being aged was observed. The viability of this phase transformation was also demonstrated by first-principles calculations.
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Li, Cm., Cheng, Np., Chen, Zq. et al. Deep-cryogenic-treatment-induced phase transformation in the Al-Zn-Mg-Cu alloy. Int J Miner Metall Mater 22, 68–77 (2015). https://doi.org/10.1007/s12613-015-1045-7
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DOI: https://doi.org/10.1007/s12613-015-1045-7