文章信息/Info

Title:

Research on Microstructure and Mechanical Properties of 5182 Aluminium Alloy with Surface Mechanical Attrition Treatment

作者:

徐穎宣; 孟祥晨; 李 根; 金 斌; 蓋炳君; 謝庭禎; 劉 勇; 呂 堅

南昌大學 高等研究院，江西省高性能精確成形重點實驗室；香港城市大學機械與生物醫學工程系，深圳研究院 先進結構材料中心

Author(s):

XU Yingxuan; MENG Xiangchen; LI Gen;  JIN Bin;  GE Bingjun;  XIE Tingzhen;  LIU Yong;  LV Jian

Institute of Advanced Studies, Key Laboratory of Near Net Forming of Jiangxi Province, Nanchang University; Department of Mechanical and Biomedical Engineering, Centre for Advanced Structural Materials, City University of Hong Kong

關鍵詞:

鋁合金; 表面機械研磨處理; 梯度結構; 微觀組織; 力學性能

Keywords:

aluminum alloy; surface mechanical attrition treatment; gradient structure; microstructure; mechanical properties

DOI:

10.7502/j.issn.1674-3962.2017.02.06

文獻標志碼:

A

摘要:

5182鋁合金經過表面機械研磨處理（SMAT），可以克服鋁合金表面性能的不足，提高鋁合金材料整體性能，延長使用壽命。采用X-射線衍射儀(XRD)及顯微硬度、單軸拉伸等測試方法，研究了使用表面機械研磨處理后5182鋁合金的顯微組織和力學性能特征。經過SMAT處理后的5182鋁合金，其表面晶粒細化至納米級，且沿試樣表面到芯部方向形成納米梯度結構；其板材的整體硬度都有一定的提高，且沿板材試樣表面到芯部方向形成了梯度下降的狀態；隨著表面機械研磨處理時間的增加，5182鋁合金的抗拉強度和屈服強度強度也隨之提升，但在一定程度上犧牲了合金的塑性。

Abstract:

Surface mechanical attrition treatment (SMAT) can overcome the shortcomings of the surface properties of aluminum, improve the overall performance of the material, and prolong service life, therefore, this work was carried out on 5182 aluminum alloys subjected to SMAT. Using X-ray diffraction (XRD), micro-hardness and uniaxial tensile test equipment systems, the authors study the characteristics of microstructure and mechanical properties of 5182 aluminum alloys with different grain sizes after SMAT. The surface grain of the 5182 aluminum alloy was refined to nanoscale after SMAT, and the gradient nanostructure was formed from the surface to the core of the sample; the overall hardness of the sample had a certain increase and it decreased in a gradient trend from the surface to the core; the tensile strength and yield strength of the 5182 aluminum alloy were increased, but the plasticity was sacrificed to a certain extent with the increase of the treatment time.