Abstract
This paper describes an experimental study of a temperature effect on the fracture of laser welded joints of Mg- and Cu-containing aviation aluminum alloys. The fracture of alloys and their welded joints under a uniaxial loading at temperatures of −60, 20, and 85◦C is under study. It is revealed that the strength and ultimate strain of welded joints of Cu-containing alloys decrease as temperature rises because of the formation of fixed zones of localized plastic shears. Heating and cooling suppress the Portevin–Le Chatelier effect and significantly reduce the ultimate strain of a Mg-containing alloy, even though such reduction is not observed in a welded joint. It is shown that, the maximum limiting elongation of the welded joint of a Mg-containing alloy is achieved at a negative temperature, while the formation of secondary cracks is begins during heating.
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References
J. C. Williams and E. A. Starke, “Progress in Structural Materials for Aerospace Systems,” Acta Mater. 51, 5775–5799 (2003).
R. J. Rioja and J. Liu, “The Evolution of Al–Li Base Products for Aerospace and Space Applications,” Metallurg. Mater. Trans., A 43, 3325–3337 (2012).
N. Jie, Z. Lin–jie, B. Qing–lin, et al., “Comparison of the Microstructure and Mechanical Performance of 2A97 Al–Li Alloy Joints between Autogenous and Non–Autogenous Laser Welding,” Mater. Design 120, 144–156 (2017).
H. Bing, T. Wang, Ch. Yanbin, and L. Hao, “Double–Sided Laser BeamWelded T–Joints for Aluminum–Lithium Alloy Aircraft Fuselage Panels: Effects of Filler Elements on Microstructure and Mechanical Properties,” Optics Laser Technol. 93, 99–108 (2017).
Z. Xinyi, H. Ting, Y. Wuxiong, et al., “Microstructure and Mechanical Properties of Laser Beam–Welded AA2060 Al–Li Alloy,” J. Mater. Process. Technol. 237, 301–308 (2016).
X. Rongshi and Zh. Xinyi, “Problems and Issues in Laser BeamWelding of Aluminum–Lithium Alloys,” J. Manufactur. Process 16, 166–175 (2014).
V. I. Lukin, E. N. Ioda, M. D. Panteleev, et al., “Effect of Heat Treatment of the Mechanical Properties and Corrosion Resistance of Welded Joints in High–Strength Aluminium–Lithium Alloys,” Welding Intern. 31 (6), 477–480 (2017).
B. D. Annin, V. M. Fomin, V. V. Antipov, et al., “Laser Welding of a 1424 Aluminum Alloy,” Dokl. Akad. Nauk 465 (4), 419–424 (2015).
B. D. Annin, V. M. Fomin, E. V. Karpov, et al., “Effect of Mg and Cu on Mechanical Properties of High–Strength Welded Joints of Aluminum Alloys Obtained by Laser Welding,” Prikl. Mekh. Tekh. Fiz. 58 (5), 208–217 (2017) [J. Appl. Mech. Tech. Phys. 58 (5), 939–946 (2017)].
L. B. Zuev, “Chernov–Luders and Portevin–Le Chatelier Deformations in Active Deformable Media of Different Nature,” Prikl. Mekh. Tekh. Fiz. 58 (2), 164–171 (2017) [J. Appl. Mech. Tech. Phys. 58 (2), 328–334 (2017)].
V. I. Danilov, A. V. Bochkareva, and L. B. Zuev, “Macrolocalization of Deformations in a Material with Jerky Flow,” Fiz. Metal. Metalloved. 107 (6), 660–667 (2009).
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Original Russian Text © E.V. Karpov, A.G. Malikov, A.M. Orishich, B.D. Annin.
Translated from Prikladnaya Mekhanika i Tekhnicheskaya Fizika, Vol. 59, No. 5, pp. 191–199, September–October, 2018.
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Karpov, E.V., Malikov, A.G., Orishich, A.M. et al. Temperature Effect on the Fracture of Laser Welded Joints of Aviation Aluminum Alloys. J Appl Mech Tech Phy 59, 934–940 (2018). https://doi.org/10.1134/S002189441805022X
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DOI: https://doi.org/10.1134/S002189441805022X