Effect of TIG and FSW Welding Processes on Mechanical Properties of Al-4.2Mg-0.6Mn-0.4Sc-0.1Zr Alloy

Strojnícky časopis - Journal of Mechanical Engineering Pub Date : 2021-11-01 DOI:10.2478/scjme-2021-0036

Srinivasa Rao Mallipudi, Tangudu Sai Shankar, Perumalla Srikar, Uppda Bhanoji Rao, Yandra Chandrasekhar, Kambhampati Karthikeyan

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引用次数: 1

Abstract

Abstract In this study, friction stir welding (FSW) and Tungsten gas welding (TIG) processes were used to weld 5 mm thick Al-4.2Mg-0.6Mn-0.4Sc-0.1Zr alloy plates. The FSwelds and TIG welds were tested for mechanical properties (hardness, ultimate tensile strength, bending strength and impact strength) by means of vicker’s hardness machine, universal testing machine and impact test machine respectively. The strength of the base material was higher, compared to the strength of the FSW and TIG welded joints. The strength of the TIG welded joint decreased, compared to the strength of the FSW welded joint. The microstructure features were also observed for base material with the aid of metallurgical microscope and compared the same with the microstructures of FSW and TIG welded joints. FSW change the material strength due to fine-grain refinement in the stir zone in Al-4.2Mg-0.6Mn-0.4Sc-0.1Zr alloy and therefore FS welded joint exhibited 91.6% joint efficiency followed by the TIG welded joint of 69.8%.

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TIG和FSW焊接工艺对Al-4.2Mg-0.6Mn-0.4Sc-0.1Zr合金力学性能的影响

摘要:采用搅拌摩擦焊(FSW)和钨气焊(TIG)两种焊接工艺，对5 mm厚Al-4.2Mg-0.6Mn-0.4Sc-0.1Zr合金板进行了焊接。采用维氏硬度试验机、万能试验机和冲击试验机分别对fsw焊缝和TIG焊缝的力学性能(硬度、极限抗拉强度、弯曲强度和冲击强度)进行了测试。与FSW和TIG焊接接头的强度相比，母材的强度更高。与FSW焊接接头相比，TIG焊接接头的强度有所下降。利用金相显微镜观察了母材的显微组织特征，并与FSW和TIG焊接接头的显微组织进行了比较。在Al-4.2Mg-0.6Mn-0.4Sc-0.1Zr合金中，由于搅拌区的细晶细化，FSW改变了材料的强度，因此FS焊接接头的接头效率为91.6%，其次是TIG焊接接头的69.8%。

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Strojnícky časopis - Journal of Mechanical Engineering

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