Wyniki wyszukiwania - BazTech

Ograniczanie wyników

1 Archives of Civil and Mechanical Engineering

1 2023

Znaleziono wyników: 1

Liczba wyników na stronie

Wyniki wyszukiwania

Sortuj według:

Ogranicz wyniki do:

The formation of new (Al, Zn)3Zr precipitates in an Al-Zn-Mg-Cu aluminum alloy after aging treatment and their response to dynamic compression

Khan Muhammad Abubaker, Wang Yangwei, Afifi Mohamed A., Tabish Mohammad, Hamza Muhammad, Yasin Ghulam, Ahmad Tahir, Liao Wei‑Bing

Archives of Civil and Mechanical Engineering

2023

Vol. 23, no. 1

art. no. e33, 2023

This study mainly focuses on the newly developed (Al, Zn)3Zr precipitates through double aging treatment in an Al-Zn-Mg-Cu alloy (Al alloy) and their response to dynamic compression. The results show that the strength of the Al alloy after aging treatment (393 K for 8 h + 433 K for 10 h) is increased with an increasing strain rate from 1.0 x 10−3 to 3.0 x 103s−1 assisted by the strain hardening rate effect. The microstructures of Al alloy after the double aging treatment and dynamic compression at ~ 3.0 x 103s−1 contain novel (Al, Zn)3Zr precipitate with LI2 ordered and tetragonal structures. The small inter-particle spacing of precipitates after double aging, solute diffusion during the aging treatment, and dynamic compression lead to the overlapping of the different precipitates. For instance, the overlapping of (Al, Zn)3Zr and θ′ precipitates is observed. The overlapped (Al, Zn)3Zr contains Cu solutes, while the θ′ precipitate contains Zr solutes assisted by solute diffusion through dislocations and the increase in temperature during the compression. Besides, the number and size of the platelet precipitates are also increased after the dynamic compression compared to the double aging treatment Al alloy. In this research, the newly observed (Al, Zn)3Zr precipitate after double aging treatment, and post-high strain rate compression is suitable for successfully tailoring the precipitation of Al-Zn-Mg-Cu alloy and achieving optimum properties in the near future.