直流磁场对纯铝结晶取向和力学性能的影响
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摘要
研究了直流磁场对纯铝结晶取向和力学性能的影响。结果表明:直流磁场对纯铝凝固组织的影响很小。在0.28~0.56 T的直流磁场作用下,纯铝在(220)面形成了明显的择优取向;当磁场强度为0.84 T时,与无磁场时相比,纯铝在各晶面所对应的衍射峰强度都有所下降;在0.84~1.4 T的磁场作用下,纯铝的结晶取向变化不大。在直流磁场作用下,纯铝的抗拉强度和伸长率均有所提高。当磁场强度为0.28 T时,纯铝的抗拉强度和伸长率都达到最高,与未处理试样相比,分别提高了6.89%和26.21%。
The influences of DC magnetic field on crystal orientation and mechanical properties of pure aluminum were studied. The results show that DC magnetic field has little effect on the solidification microstructure of pure aluminum. When the strength of DC magnetic field is at 0.28-0.56 T, the clear preferred orientation of pure aluminum appears on the crystal plane(220). Compared with no magnetic field, the diffraction intensity of pure aluminum in each crystal plane decreases when the strength of magnetic field is 0.84 T. The influence of DC magnetic field on crystal orientation of pure aluminum is not obvious when the strength of magnetic field is at 0.84-1.4 T. The tensile strength and elongation of pure aluminum increase under the magnetic field treatment. When the magnetic field intensity is 0.28 T, the tensile strength and elongation of pure aluminum are the highest, which are increased by 6.89% and 6.21%, respectively, compared with the sample without magnetic field treatment.
The influences of DC magnetic field on crystal orientation and mechanical properties of pure aluminum were studied. The results show that DC magnetic field has little effect on the solidification microstructure of pure aluminum. When the strength of DC magnetic field is at 0.28-0.56 T, the clear preferred orientation of pure aluminum appears on the crystal plane(220). Compared with no magnetic field, the diffraction intensity of pure aluminum in each crystal plane decreases when the strength of magnetic field is 0.84 T. The influence of DC magnetic field on crystal orientation of pure aluminum is not obvious when the strength of magnetic field is at 0.84-1.4 T. The tensile strength and elongation of pure aluminum increase under the magnetic field treatment. When the magnetic field intensity is 0.28 T, the tensile strength and elongation of pure aluminum are the highest, which are increased by 6.89% and 6.21%, respectively, compared with the sample without magnetic field treatment.
引文
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[11]刘楚明,李冰峰,王荣,等.二次挤压对Mg-12Gd-3Y-0.6Zr合金显微组织及力学性能的影响[J].中国有色金属学报,2010,20(2):171-176.
[2]谭水淋,周全,万红,等.直流磁场对纯镁凝固组织和织构及力学性能的影响[J].特种铸造及有色合金,2014,34(11):1207-1210.
[3]章森,周全,张浩.纵向直流磁场对Mg97Y2Cu1合金凝固组织及力学性能的影响[J].热加工工艺,2015,44(17):20-23.
[4]黄曼青,周全,刘峰,等.直流磁场对AZ91D镁合金凝固组织和力学性能的影响[J].特种铸造及有色合金,2016,36(3):320-323.
[5]高志玉,修凤玲,张伟强.热电磁流体动力学效应对Al-4.0Cu定向凝固组织的影响[J].特种铸造及有色合金,2007,27(1):16-18.
[6]朱耀明.单晶铝中磁化现象的方向性及其对铝的磁化率值的影响[J].仪表材料,1982,13(6):25-29.
[7]王恩刚,左小伟,张林,等.强磁场作用下偏晶合金取向凝固组织的形成[J].特种铸造及有色合金,2008(S1):478-481.
[8]任忠鸣.强磁场下金属凝固研究进展[J].中国材料进展,2010,29(6):40-49.
[9]Kim W J,Park J D,Wang J Y,et al.Realization of low-temperature superplasticity in Mg-Al-Zn alloy sheets processed by differential speed rolling[J].Scripta materialia,2007,57(8):755-758.
[10]张新明,石其年.二次挤压对Al-Li合金挤压织构和力学性能的影响[J].中南矿冶学院学报,1991,22(2):174-181.
[11]刘楚明,李冰峰,王荣,等.二次挤压对Mg-12Gd-3Y-0.6Zr合金显微组织及力学性能的影响[J].中国有色金属学报,2010,20(2):171-176.