焊接工具偏移对双轴肩搅拌摩擦焊S线形态与接头力学性能的影响

赵运强; 闫德俊; 蒋勇刚; 王春桂; 邓军; 徐光周

doi:10.7512/j.issn.1001-2303.2024.12.01

船舶先进焊接制造技术 | 浏览量 : 0 下载量: 582 CSCD: 0

PDF
导出
分享
收藏
专辑

焊接工具偏移对双轴肩搅拌摩擦焊S线形态与接头力学性能的影响
Influence of Welding Tool Offset on the Morphology and Mechanical Properties of Biaxial Shoulder Friction Stir Welding S-line
2024年54卷第12期页码：1-7
收稿：2024-08-15，

修回：2024-11-23，

纸质出版：2024-12-25
DOI： 10.7512/j.issn.1001-2303.2024.12.01
稿件说明：

移动端阅览

赵运强，闫德俊，蒋勇刚，等.焊接工具偏移对双轴肩搅拌摩擦焊S线形态与接头力学性能的影响［J］.电焊机，2024，54（12）：1-7. DOI： 10.7512/j.issn.1001-2303.2024.12.01.

ZHAO Yunqiang, YAN Dejun, JIANG Yonggang, et al.Influence of Welding Tool Offset on the Morphology and Mechanical Properties of Biaxial Shoulder Friction Stir Welding S-line[J].Electric Welding Machine, 2024, 54(12): 1-7. DOI： 10.7512/j.issn.1001-2303.2024.12.01.

摘要

采用传统双轴肩搅拌摩擦焊（BT-FSW）和新型偏移双轴肩搅拌摩擦焊（OBT-FSW）两种方法对6005-T6铝合金型材进行焊接，并对比分析两种方法对界面材料流动、“S”线形貌和接头力学性能的影响。其中，OBT-FSW通过将焊接工具朝后退侧偏移一定距离，增强对接界面氧化膜的搅拌效果。为模拟并对比两种焊接方法对对接界面氧化膜的搅拌效果，设计了焊接急停实验，并采用扫描电子显微镜观察焊缝元素分布和接头断裂形貌。结果表明，传统BT-FSW方法使对接界面氧化膜朝后退侧弯曲，并绕过搅拌针，最终在搅拌区形成连续“S”线；OBT-FSW通过将焊接工具朝后退侧（RS）偏移一定距离，可以增强对接界面氧化膜的搅拌效果，在搅拌区内形成弥散的“S”线，进而消除“S”线对接头力学性能的不利影响。OBT-FSW接头的抗拉强度和延伸率显著提升，拉伸性能的波动也显著降低，有效改善了接头的力学性能。

Abstract

The traditional biaxial shoulder friction stir welding (BT-FSW) and the novel offset biaxial shoulder friction stir welding (OBT-FSW) methods were used to weld 6005-T6 aluminum alloy profiles

and the effects of the two methods on interface material flow

"S" line morphology

and joint mechanical properties were compared and analyzed. In OBT-FSW

the welding tool is offset a certain distance towards the retreating side to enhance the stirring effect on the oxide film at the bonding interface. To simulate and compare the stirring effects of the two welding methods on the oxide film at the bonding interface

a welding emergency stop experiment was designed

and the distribution of weld elements and joint fracture morphology were observed using a scanning electron microscope. The results show that the traditional BT-FSW method causes the oxide film at the bonding interface to bend towards the retreating side and bypass the stirring pin

eventually forming a continuous "S" line in the stirring zone; OBT-FSW can enhance the stirring effect on the oxide film at the bonding interface by offsetting the welding tool a certain distance towards the retreating side (RS)

forming a dispersed "S" line in the stirring zone

thereby eliminating the adverse effect of the "S" line on the joint mechanical properties. The tensile strength and elongation of OBT-FSW joints are significantly improved

the fluctuation of tensile properties is significantly reduced

effectively improving the mechanical properties of the joints.

关键词

Keywords

references

Meng X C ， Huang Y X ， Cao J ， et al . Recent progress on control strategies for inherent issues in friction stir welding ［J］. Progress in Materials Science ， 2021 （ 115 ）： 100706 .

Wu D ， Li W Y ， Gao Y J ， et al . Effect of an improved pin design on weld formability and mechanical properties of adjustable-gap bobbin-tool friction stir welded Al-Cu aluminum alloy joints ［J］. J ournal of Manufacturing Processes ， 2020 （ 58 ）： 1182 - 1188 .

Trueba L ， Torres M A ， Johannes L B ， et al . Process optimization in the self-reacting friction stir welding of aluminum 6061-T6 ［J］. International Journal of Material Forming ， 2017 ， 11 （ 4 ）： 559 - 570 .

Fuse K ， Badheka V . Bobbi tool friction stir welding： a review ［J］. Science and Technology of Welding and Joining ， 2018 ， 24 （ 4 ）： 277 - 304 .

Li G H ， Zhou L ， Luo S F ， et al . Quality improvement of bobbin tool friction stir welds in Mg-Zn-Zr alloy by adjusting tool geometry ［J］. Journal Of Materials Processing Technology ， 2020 ， 282 ： 116685 .

Zhou L ， Li G H ， Liu C L ， et al . Microstructural characteristics and mechanical properties of Al-Mg-Si alloy self-reacting friction stir welded joints ［J］. Science and Technology of Welding and Joining ， 2016 ， 22 （ 5 ）： 438 - 445 .

Xu W F ， Luo Y X ， Zhang W ， et al . Comparative study on local and global mechanical properties of bobbin tool and conventionl friction stir welded 7085-T7452 aluminum thick plate ［J］. Journal of Materials Science & Technology ， 2018 ， 34 （ 1 ）： 173 - 184 .

Zeng X H ， Xue P ， Wang D ， et al . Effect of Processing Parameters on Plastic Flow and Defect Formation in Friction-Stir-Welded Aluminum Alloy ［J］. Metallurgical and Materials Transactions A-Physical Metallurgy and Materials Science ， 2018 ， 49 （ 7 ）： 2673 - 2683 .

Esmaily M ， Mortazavi N ， Osikowicz W ， et al . Bobbin and conventional friction stir welding of thick extruded AA6005-T6 profiles ［J］. Materials & Design ， 2016 ， 108 ： 114 - 125 .

Sharma C ， Dwivedi D K ， Kumar P . Influence of pre-weld temper conditions of base metal on microstructure and mechanical properties of friction stir weld joints of Al-Zn-Mg alloy AA7039 ［J］. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing ， 2015 ， 620 ： 107 - 119 .

Reynolds A P . Visualization of material flow in autogenously friction stir welds ［J］. Science and Technology of Welding and Joining ， 2000 （ 5 ）： 120 - 124 .

Chen H B ， Wang J F ， Zhen G D ， et al . Effects of initial oxide on microstructural and mechanical properties of friction stir welded AA2219 alloy ［J］. Materials & Design ， 2015 ， 86 ： 49 - 54 .

Liu H J ， Chen Y C ， Feng J C . Effect of zigzag line on the mechanical properties of friction stir welded joints of an Al-Cu alloy ［J］. Scripta Materialia ， 2006 ， 55 （ 3 ）： 231 - 234 .

Tao Y ， Zhang Z ， Ni D R ， et al . Influence of welding parameter on mechanical properties and fracture behavior of friction stir welded Al-Mg-Sc joints ［J］. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing ， 2014 ， 612 ： 236 - 245 .

Park H S ， Kimura T ， Murakami T ， et al . Microstructures and mechanical properties of friction stir welds of 60% Cu-40% Zn copper alloy ［J］. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing ， 2004 ， 371 （ 1 ）： 160 - 169 .

Ren S R ， Ma Z Y ， Chen L Q . Effect of initial butt surface on tensile properties and fracture behavior of friction stir welded Al-Zn-Mg-Cu alloy ［J］. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing ， 2008 ， 479 （ 1-2 ）： 293 - 299 .

Sato Y S ， Takauchi H ， Park S H C ， et al . Characteristics of the kissing-bond in friction stir welded Al alloy 1050 ［J］. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing ， 2005 ， 405 （ 1-2 ）： 333 - 338 .

Sharma C ， Dwivedi D K ， Kumar P . Effect of welding parameters on microstructure and mechanical properties of friction stir welded joints of AA7039 aluminum alloy ［J］. Materials & Design ， 2012 ， 36 ： 379 - 390 .