Effects of Sc and Zr on microstructure and properties of 1420 aluminum alloy
Effects of Sc and Zr on microstructure and properties of 1420 aluminum alloy
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DOI：
10.1016/j.matchar.2019.06.001
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发表时间：
2019-08
影响因子：
4.7
通讯作者：
Yangqiu Wang;Hongyu Liu;Xiaochun Ma;R. Wu;Jianfeng Sun;L. Hou;Jinghuai Zhang;Xin-lin Li
中科院分区：
文献类型：
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作者：
Yangqiu Wang;Hongyu Liu;Xiaochun Ma;R. Wu;Jianfeng Sun;L. Hou;Jinghuai Zhang;Xin-lin Li
研究了Sc和Zr对1420铝合金组织和性能的影响。随着Sc和Zr的添加，凝固过程中形成的粗大初生Al3(Sc,Zr)颗粒在均匀化过程中难以溶解到基体中。时效过程中出现Al3Li和Al3Li/Al3(Sc,Zr)的析出。 Sc和Zr的添加延缓了Al3Li和δ'-PFZ的生长速率。 Sc和Zr的添加显着提高了机械性能。 1420-Sc-Zr合金在190℃时效16h后获得力学性能（UTS=300MPa，YS=211MPa，EL=6.8%）。此外，Sc和Zr的添加显着影响热扩散率和耐腐蚀性。添加Sc和Zr后，时效过程中的热扩散率有效提高了28%，但耐腐蚀性能有所下降。
Effects of Sc and Zr on microstructure and properties of 1420 aluminum alloy were investigated. With the additions of Sc and Zr, the coarse primary Al3(Sc,Zr) particles formed at the solidification process were difficult to be dissolved into the matrix during homogenization. The precipitations of Al3Li and Al3Li/Al3(Sc,Zr) occurred during aging process. The growth rates of Al3Li and δ′-PFZs were retarded with the additions of Sc and Zr. The mechanical properties were significantly improved with the additions of Sc and Zr. The mechanical properties (UTS = 300 MPa, YS = 211 MPa and EL = 6.8%) were obtained in 1420-Sc-Zr alloy aged at 190 °C for 16 h. Moreover, the thermal diffusivity and corrosion resistance were significantly affected with the additions of Sc and Zr. With the additions of Sc and Zr, the thermal diffusivity was efficiently increased by 28% during aging process, however, the corrosion resistance decreased.