High strength and good ductility of casting Al–Cu alloy modified by PrxOy and LaxOy
High strength and good ductility of casting Al–Cu alloy modified by PrxOy and LaxOy
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DOI：
10.1016/j.jallcom.2010.09.059
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发表时间：
2011-02
影响因子：
6.2
通讯作者：
Hailong Zhao;D. Yao;F. Qiu;Yumei Xia;Q. Jiang
中科院分区：
文献类型：
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作者：
Hailong Zhao;D. Yao;F. Qiu;Yumei Xia;Q. Jiang
通过添加多种稀土氧化物（PrxOy和LaxOy）作为变质剂，获得了抗拉强度和塑性分别达到574.0MPa和10.4%的Al-Cu合金。与未改性的Al-Cu合金相比，改性试样的抗拉强度和塑性分别提高了24.3%和42.5%。合金的强度和塑性的提高主要是由于晶粒和枝晶的细化、θ′相析出的均匀性以及在晶界和枝晶间隙形成的金属间化合物。
A modified Al–Cu alloy with high tensile strength and ductility of about 574.0MPa and 10.4%, respectively, was obtained by adding multiple rare earth oxides (PrxOyand LaxOy) as modifier. Compared with the unmodified Al–Cu alloy, the tensile strength and ductility of the modified sample were increased by 24.3% and 42.5%, respectively. The improvement both in the strength and ductility may attribute to the finer crystal grains and dendrites, more homogeneously distributed θ′ phase precipitates and the intermetallic compounds formed at the crystal grain boundaries as well as in the space of the dendrites.