搅拌针偏移对6005A-T6铝合金焊接接头性能的影响

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中图分类号：U466 文献标志码：B DOI：10.19710/J.cnki.1003-8817.20250108

Effect of Tool-Pin Offset on Properties of 60o5A-T6 Aluminum Alloy Joint

DengShouxin'，Yuan Yuan²，TangHongyang'，WangDonghui 1 ，LiuDongli 1 ，LiHuan' （1.Liaoyang XiangyuAluminumIndustryCo.Ltd.，Liaoyangoo;2.BeijingAntaikeInformationCo，Ltd.Beijing08）

Abstract：To investigate theeffectsof diferent too-pinoffset directionsand magnitudeson welded joint performance，astudy isconducted on theFriction Stir Welding （FSW）process of 5mm thick 60o5A-T6aluminum alloy.Theresults showthat the tool-pinoffset direction exerts a minorinfluenceon joint property.When thetool-pin ffset iswithintherangeofO～2mm，thejointqualityisgood，exhibitingnodefectssuchastunnelsor voids，and the mechanicalpropertiesexhibitminimalfluctuation，witha tensilestrengthof210～215MPa.When the tooloffset reaches2.5mm，a lack of penetrationdefectappears in theweld，leading toaseverereductionin mechanical properties，with thetensilestrength dropping to150～16OMPa.Fortol-pinofsets below 2mm，thetensile fracture surfaceexhibitsthe typical ductilefracture morphologycharacteristicof aluminum allywelds.Atanoffsetof2.5mm， thelocationof thelackof penetration becomesthecrack initiationsiteforfracture，andthetensilefracturesurface shows amixed morphology combining quasi-cleavage fracture and ductile fracture.The fatigue performance of the joint ishigher for a tool-pin offset of O mm compared to that for an offset of 2mm ：

Keywords：Tool-pinoffset，6oo5A-T6aluminumalloy，Weldingproperties

1前言

随着我国轨道交通范围的不断扩大、装备制造水平的不断攀升，对轨道装备制造领域所需材料要求的不断提高，涌现了一大批绿色环保、高强耐蚀的铝合金材料。（剩余5681字）