INFLUENCE OF HEAT TREATMENT OF LASER-WELDED JOINTS OF ALUMINUM-LITHIUM ALLOYS ON PLASTIC FLOW INSTABILITY

The experimentally observed evolution of unstable plastic flow of laser-welded specimens of Al–6Mg–2Li, Al–1.6Cu–1.1Mg–1.8Li, and Al–3.4Cu–0.66Mg–1.5Li aluminum–lithium alloys under different heat treatment conditions after welding was analyzed. A comparison of the jerky flow of alloys with differen...

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Veröffentlicht in:	Journal of applied mechanics and technical physics 2021-11, Vol.62 (6), p.1015-1027
Hauptverfasser:	Karpov, E. V., Malikov, A. G., Orishich, A. M.
Format:	Artikel
Sprache:	eng
Schlagworte:	Aluminum-lithium alloys Applications of Mathematics Classical and Continuum Physics Classical Mechanics Copper Edge dislocations Flow stability Fluid- and Aerodynamics Heat treatment Laser beam welding Lithium Magnesium Mathematical Modeling and Industrial Mathematics Mechanical Engineering Physics Physics and Astronomy Plastic flow Shear bands Welded joints
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Zusammenfassung:	The experimentally observed evolution of unstable plastic flow of laser-welded specimens of Al–6Mg–2Li, Al–1.6Cu–1.1Mg–1.8Li, and Al–3.4Cu–0.66Mg–1.5Li aluminum–lithium alloys under different heat treatment conditions after welding was analyzed. A comparison of the jerky flow of alloys with different concentrations of magnesium, copper, and lithium was performed. The effect of copper on the spatial consistency of the localized shear bands formed in aluminum–lithium alloys under unstable plastic flow was studied.
ISSN:	0021-8944 1573-8620
DOI:	10.1134/S0021894421060171