Analysis of mechanical properties and microstructure of single and double-pass friction stir welded T-joints for aluminium stiffened Panels
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In: Materials and Design, Vol. 247, 113438, 11.2024.
Research output: Journal contributions › Journal articles › Research › peer-review
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TY - JOUR
T1 - Analysis of mechanical properties and microstructure of single and double-pass friction stir welded T-joints for aluminium stiffened Panels
AU - Wagner, Douglas
AU - Bernardi, Matteo
AU - Grassel, Felix
AU - Chen, Ting
AU - Schimanski, Kai
AU - Bergmann, Luciano
AU - Klusemann, Benjamin
N1 - Publisher Copyright: © 2024 The Authors
PY - 2024/11
Y1 - 2024/11
N2 - This study investigates the application of Friction Stir Welding (FSW) for fabricating stiffened structures in AA2219-T31 using a T-lap configuration. These structures are vital in various applications where weight is a crucial factor, including aircraft fuselages, railway cars and automotive parts. This study assesses the formation dynamics of lack of bonding in single-pass welds, including the examination of microstructure, hardness, mechanical properties, and fracture locations. A second welding pass was employed over the initial weld to eliminate the lack of bonding. The implementation of a second welding pass significantly improves joint efficiency, achieving up to 90 % of the ultimate tensile strength in the skin direction and 95 % in the stiffener direction, establishing a new benchmark for AA2219-T31 T-joints. Additionally, no significant differences in grain size were found between single- and double-pass welds, highlighting the lack of bonding as key factor affecting the strength of the joints. The proposed method offers valuable insights for future industrial applications to avoid defects such as lack of bonding.
AB - This study investigates the application of Friction Stir Welding (FSW) for fabricating stiffened structures in AA2219-T31 using a T-lap configuration. These structures are vital in various applications where weight is a crucial factor, including aircraft fuselages, railway cars and automotive parts. This study assesses the formation dynamics of lack of bonding in single-pass welds, including the examination of microstructure, hardness, mechanical properties, and fracture locations. A second welding pass was employed over the initial weld to eliminate the lack of bonding. The implementation of a second welding pass significantly improves joint efficiency, achieving up to 90 % of the ultimate tensile strength in the skin direction and 95 % in the stiffener direction, establishing a new benchmark for AA2219-T31 T-joints. Additionally, no significant differences in grain size were found between single- and double-pass welds, highlighting the lack of bonding as key factor affecting the strength of the joints. The proposed method offers valuable insights for future industrial applications to avoid defects such as lack of bonding.
KW - Friction stir welding
KW - T-Joint
KW - Aluminium alloy
KW - Mechanical behaviour
KW - Microstructure analysis
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=85208681281&partnerID=8YFLogxK
UR - https://www.mendeley.com/catalogue/3478b486-68ac-368e-ad19-1c3b0b9957bf/
U2 - 10.1016/j.matdes.2024.113438
DO - 10.1016/j.matdes.2024.113438
M3 - Journal articles
VL - 247
JO - Materials and Design
JF - Materials and Design
SN - 0264-1275
M1 - 113438
ER -