表面机械研磨处理5182铝合金的组织和力学性能研究

发布时间：2018-03-27 11:07

本文选题：铝合金　切入点：表面机械研磨处理　出处：《中国材料进展》2017年02期

【摘要】：5182铝合金经过表面机械研磨处理(SMAT),可以克服铝合金表面性能的不足,提高铝合金材料整体性能,延长使用寿命。采用X-射线衍射仪(XRD)及显微硬度、单轴拉伸等测试方法,研究了使用表面机械研磨处理后5182铝合金的显微组织和力学性能特征。经过SMAT处理后的5182铝合金,其表面晶粒细化至纳米级,且沿试样表面到芯部方向形成纳米梯度结构;其板材的整体硬度都有一定的提高,且沿板材试样表面到芯部方向形成了梯度下降的状态;随着表面机械研磨处理时间的增加,5182铝合金的抗拉强度和屈服强度强度也随之提升,但在一定程度上牺牲了合金的塑性。
[Abstract]:After surface mechanical grinding, 5182 aluminum alloy can overcome the shortage of surface properties of aluminum alloy, improve the overall properties of aluminum alloy and prolong its service life. The testing methods of microhardness and uniaxial tension are adopted by using X- ray diffractometer (X- ray diffractometer) and microhardness, uniaxial tensile test, etc. The microstructure and mechanical properties of 5182 aluminum alloy treated by surface mechanical grinding were studied. After SMAT treatment, the surface grain of 5182 aluminum alloy was refined to nanometer level, and the nano-gradient structure was formed along the direction from the surface to the core of the sample. The overall hardness of the plate has been improved to a certain extent, and the gradient has decreased along the direction of the sample surface to the core, and the tensile strength and yield strength of the alloy have also increased with the increase of the surface mechanical grinding time. But the plasticity of the alloy was sacrificed to some extent.
【作者单位】：南昌大学高等研究院;南昌大学江西省高性能精确成形重点实验室;香港城市大学机械与生物医学工程系;香港城市大学深圳研究院先进结构材料中心;
【基金】：国家自然科学基金(51464034,51671101) 江西省教育厅基金(GJJ150010) 国家重点研发计划(2016YFB0701201) 江西省自然科学基金青年重大项目(20161ACB21003) 江西省杰出青年人才计划(20162BCB23013) 国家基础研究计划(9500006) 香港联合研究基金(C4028-14G)
【分类号】：TG146.21;TG580.68

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