Microstructure evolution and strengthening mechanisms of an additive friction stir deposited multi-layer Al-Mg-Sc-Zr alloy

Mingtao Zhang, Tao Jiang, Yunfei Xie, Xiangnan Feng, Yu Su, Zhikang Shen, Zhonggang Sun, Yaxin Xu, Wenya Li

科研成果: 期刊稿件文章同行评审

9 引用 (Scopus)

摘要

In recent years, additive friction stir deposition (AFSD) has emerged as a promising solid-based additive manufacturing method with applications with lightweight materials such as aluminum alloys. In this study, a three-layer Al-Mg-Sc-Zr alloy deposit was produced with AFSD. The mechanism of continuous dynamic recrystallization in the deposit was identified, revealing average grain sizes of 9.9 μm at the top and 8.8 μm at the bottom. The phase boundaries between micron-sized and nano-sized Al3Sc reinforced phase particles and the alloy matrix were studied which confirmed orientations of {1 1 1} Al∥{1 1 1} Al3Sc and [1 1 2] Al∥[1 1 2] Al3Sc. The yield strength of the deposit in the longitudinal direction reached 314 MPa (90 % of the substrate), and in the transverse direction was 343 MPa, equal to that of the substrate (342 MPa). Second-phase strengthening, dislocation strengthening, and solid solution strengthening affected significantly yield strength.

源语言英语
文章编号175783
期刊Journal of Alloys and Compounds
1004
DOI
出版状态已出版 - 5 11月 2024

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