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对比研究了1.4T的直流磁场处理,1%的Zr处理以及直流磁场和Zr复合处理对长周期结构增强Mg97Y2Cu1合金凝固组织和力学性能的影响。结果表明,添加Zr后,合金中生成了少量CuZr2相,且凝固组织得到了显著细化,而无论是否加Zr,直流磁场对合金凝固组织的影响均不明显;添加Zr后,合金出现了许多新的衍射峰,而单独施加直流磁场处理后合金在(100)晶面的衍射峰强度远远高于其他晶面;在磁场和Zr复合作用下,合金的衍射峰变化程度介于单一的磁场处理和Zr处理之间;直流磁场或Zr均可以有效改善合金的力学性能,且在磁场和Zr的复合作用下,合金的力学性能最高,其抗拉强度和伸长率分别为194.5 MPa和6.01%,与未处理时相比,分别提高了63.45%和11.30%。
The effects of DC magnetic field treatment at 1.4T, Zr treatment at 1%, and DC magnetic field and Zr composite treatment on the solidified microstructure and mechanical properties of Mg97Y2Cu1 alloy reinforced with long-period structure were studied. The results show that a small amount of CuZr2 phase is formed in the alloy after adding Zr, and the solidified microstructure is significantly refined. However, the effect of DC magnetic field on the solidified structure of the alloy is not obvious whether Zr is added or not. The diffraction peak intensity of the alloy on the (100) crystal plane is much higher than that of the other crystal planes when the DC magnetic field is applied alone. The diffraction peaks of the alloy under the combination of the magnetic field and Zr range from a single magnetic field And the Zr treatment. The DC magnetic field or Zr can effectively improve the mechanical properties of the alloy. Under the combined effect of magnetic field and Zr, the mechanical properties of the alloy are the highest, the tensile strength and elongation are 194.5 MPa and 6.01% , Respectively, compared with untreated, increased by 63.45% and 11.30% respectively.