超音频脉冲电流对GMA增材铝合金性能的影响

doi:10.3901/JME.260144

摘要/Abstract

摘要： 为了探究超音频脉冲电流对增材样件性能的影响，分别采用常规脉冲熔化极气保电弧(Conventional pulsed gas metal arc, CP-GMA)和复合超音频脉冲熔化极气保电弧(Hybrid ultrasonic pulsed gas metal arc, HUP-GMA)增材工艺制造了ER5356铝合金单道多层样件，并对其气孔缺陷、显微组织和力学性能进行了对比研究。与CP-GMA增材样件相比，HUP-GMA样件的气孔率由0.747%降低到0.258%，气孔平均面积由461.8 μm²减小到236.8 μm²，且增材样件层内区域晶粒得到明显细化，晶粒平均面积由73.8×10³ μm²减小到27.8×10³ μm²。两类样件拉伸性能均表现出各向异性，水平方向拉伸性能均高于竖直方向。在超音频脉冲电流作用下，HUP-GMA增材样件力学性能得到一定程度的提升，水平方向上，抗拉强度由255.9 MPa±3 MPa提升至264.9 MPa±5 MPa，断后伸长率由21.9%±1.4%增加到27.2%±4.1%；竖直方向上，抗拉强度由246.3 MPa±7 MPa提升至251.8 MPa±2 MPa，断后伸长率由20.9%±1.5%增加到26.9%±1.9%，显微硬度也由67.2 HV提升到75.6 HV。

关键词: 超音频脉冲, GMA增材制造, ER5356铝合金, 组织性能

Abstract: In order to investigate the effect of hybrid ultrasonic pulsed current on the properties of manufactured samples, single-pass multilayer samples of ER5356 aluminum alloy were fabricated by using Conventional Pulsed Gas Metal Arc (CP-GMA) and additive manufacture processes respectively, and a comparative study was carried out to investigate the porosity defects, microstructure and mechanical properties. Compared with the CP-GMA samples, the porosity of the HUP-GMA samples was reduced from 0.747% to 0.258%, and the average area of the porosity was reduced from 461.8 μm²to 236.8 μm², and the grains in the intra-layer region of the additive samples were significantly refined, and the average area of the grains was reduced from 73.8×10³μm² to 27.8×10³μm².The tensile properties of both types of samples showed anisotropy, showing that the tensile properties in the horizontal direction were higher than those in the vertical direction. Under the action of hybrid ultrasonic pulsed current, the mechanical properties of the HUP-GMA samples were improved to a certain extent. In the horizontal direction, the tensile strength was increased from 255.9 MPa±3 MPa to 264.9 MPa±5 MPa, and the elongation was increased from 21.9%±1.4% to 27.2%±4.1%; while in the vertical direction, the tensile strength was increased from 246.3 MPa±7 MPa to 251.8 MPa±2 MPa, and the elongation was increased from 20.9%±1.5% to 26.9%±1.9%; and the microhardness was also increased from 67.2 HV to 75.6 HV.

Key words: ultrasonic pulsed current, GMA additive manufacturing, ER5356 aluminum alloy, microstructure and property

中图分类号:

TG146

范霁康, 朱世宇, 李孟孟, 王强, 段林烨, 王克鸿. 超音频脉冲电流对GMA增材铝合金性能的影响[J]. 机械工程学报, 2026, 62(12): 143-150.

FAN Jikang, ZHU Shiyu, LI Mengmeng, WANG Qiang, DUAN Linye, WANG Kehong. Effect of Hybrid Ultrasonic Pulsed Current on the Properties of GMA Additive Manufactured Aluminum Alloys[J]. Journal of Mechanical Engineering, 2026, 62(12): 143-150.

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链接本文: http://www.cjmenet.com.cn/CN/10.3901/JME.260144

http://www.cjmenet.com.cn/CN/Y2026/V62/I12/143

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