Journal
MATERIALS LETTERS
Volume 315, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.matlet.2022.131930
Keywords
Al-Zn-Mg-Cu alloy; Nanocrystalline materials; Segregation; Thermal stability; SMGT
Funding
- National Natural Science Foun-dation of China [52101161]
- Ministry of Scienceand Technology of the People's Republic of China [2017YFA0700700]
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In this study, a nanolaminated structure with an average lamellae thickness of 27 nm and a high hardness of 2.86 GPa has been successfully fabricated in a solution treated Al-Zn-Mg-Cu alloy by surface mechanical grinding treatment (SMGT) at room temperature. The nanolaminated structure exhibits strong Zn and Cu segregation to grain boundaries, and the thermal stability is attributed to the grain boundary segregation and the pinning effect of numerous nanoparticles.
In this work, nanolaminated (NL) structure with an average lamellae thickness of 27 nm and a high hardness of 2.86 GPa has been fabricated in a solution treated Al-Zn-Mg-Cu alloy by surface mechanical grinding treatment (SMGT) at room temperature, featuring strong Zn and Cu segregation to grain boundaries (GBs). The NL structure shows a good thermal stability caused by GB segregation and the pinning effect of the numerous nanoparticles at the GBs.
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