Laser Beam Welding of Aeronautical Al-Cu-Li Sheets: Quasi-static Tensile Mechanical Performance and Quality Assessment of Welded Joints
Publikation: Beiträge in Zeitschriften › Konferenzaufsätze in Fachzeitschriften › Forschung › begutachtet
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in: Procedia Structural Integrity, Jahrgang 68, 2025, S. 756-761.
Publikation: Beiträge in Zeitschriften › Konferenzaufsätze in Fachzeitschriften › Forschung › begutachtet
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TY - JOUR
T1 - Laser Beam Welding of Aeronautical Al-Cu-Li Sheets
T2 - 24th European Conference on Fracture, ECF 2024
AU - Examilioti, Theano N.
AU - Charalampidou, Christina Margarita
AU - Alexopoulos, Nikolaos D.
N1 - Publisher Copyright: © 2025 The Authors. Published by ELSEVIER B.V.
PY - 2025
Y1 - 2025
N2 - The present article investigates the effect of different filler materials, different nominal sheet thickness as well as different post welding heat treatments, on the tensile mechanical performance of laser beam welded (LBWed) joints from aluminium alloy (AA) Al-Cu-Li 2198. LBWed joints were produced either using Al-Si (AA4047) or Al-Cu (AA2319) filler wires. The test results indicated that the exploitation of Al-Si filler material is beneficial for the tensile mechanical behavior of the welded joint, while it also corresponds to artificial ageing conditions with a significant increase in yield stress over artificial ageing. On the contrary, the exploitation of Al-Cu filler material demonstrated lower yield stress values and for all investigated aged conditions. Sheet thickness-dependent behavior showed that the investigated higher 5.0 mm sheet thickness exhibited higher mechanical properties compared to lower 3.2 mm sheet thickness specimens. A quality index was exploited to evaluate the global tensile mechanical performance of the investigated LBWed joints. It was observed that the LBWed joints with Al-Si filler material showed higher ‘quality' values that the respective joints with Al-Cu filler material, with the highest quality to be achieved for the peak-aged condition.
AB - The present article investigates the effect of different filler materials, different nominal sheet thickness as well as different post welding heat treatments, on the tensile mechanical performance of laser beam welded (LBWed) joints from aluminium alloy (AA) Al-Cu-Li 2198. LBWed joints were produced either using Al-Si (AA4047) or Al-Cu (AA2319) filler wires. The test results indicated that the exploitation of Al-Si filler material is beneficial for the tensile mechanical behavior of the welded joint, while it also corresponds to artificial ageing conditions with a significant increase in yield stress over artificial ageing. On the contrary, the exploitation of Al-Cu filler material demonstrated lower yield stress values and for all investigated aged conditions. Sheet thickness-dependent behavior showed that the investigated higher 5.0 mm sheet thickness exhibited higher mechanical properties compared to lower 3.2 mm sheet thickness specimens. A quality index was exploited to evaluate the global tensile mechanical performance of the investigated LBWed joints. It was observed that the LBWed joints with Al-Si filler material showed higher ‘quality' values that the respective joints with Al-Cu filler material, with the highest quality to be achieved for the peak-aged condition.
KW - Al-Cu-Li
KW - Laser Beam Welding
KW - Mechanical Performance
KW - Quality Index
KW - Engineering
UR - http://www.scopus.com/inward/record.url?scp=105012357927&partnerID=8YFLogxK
U2 - 10.1016/j.prostr.2025.06.126
DO - 10.1016/j.prostr.2025.06.126
M3 - Conference article in journal
AN - SCOPUS:105012357927
VL - 68
SP - 756
EP - 761
JO - Procedia Structural Integrity
JF - Procedia Structural Integrity
SN - 2452-3216
Y2 - 26 August 2024 through 30 August 2024
ER -