Effect of Laser Processing on Strength and Portevin–Le Chatelier Serrated Deformation of Aluminum Alloy

The effect of surface processing by laser IR radiation on strength and Portevin–Le Chatelier serrated deformation of AlMg6 aluminum–magnesium alloy is experimentally studied. Laser processing consists in local “shots” on the surface at the nodes of a square grid in the gauge part of a flat sample. T...

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Bibliographic Details
Published in:Physics of the solid state 2019-08, Vol.61 (8), p.1354-1362
Main Authors: Shibkov, A. A., Gasanov, M. F., Zolotov, A. E., Zheltov, M. A., Denisov, A. A., Kochegarov, S. S.
Format: Article
Language:English
Subjects:
ALUMINIUM ALLOYS
Aluminum
Aluminum base alloys
CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRACKS
DEFORMATION
Deformation effects
Hardness
INFRARED RADIATION
Laser processing
LASER RADIATION
Lasers
MAGNESIUM ALLOYS
Magnesium base alloys
Mechanical properties
Metals
MICROHARDNESS
MORPHOLOGY
Necking
Physics
Physics and Astronomy
Radiation
RADIATION EFFECTS
Solid State Physics
Specialty metals industry
Strain
STRAINS
Stress-strain curves
STRESSES
TENSILE PROPERTIES
Ultimate tensile strength
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Summary:The effect of surface processing by laser IR radiation on strength and Portevin–Le Chatelier serrated deformation of AlMg6 aluminum–magnesium alloy is experimentally studied. Laser processing consists in local “shots” on the surface at the nodes of a square grid in the gauge part of a flat sample. The conditions under which such laser processing causes an increase in the surface microhardness, ultimate tensile strength, and the critical strain of the first stress drop in the stress–strain curve; decreases the probability of deformation band formation; suppresses necking at the prefracture stage; and changes the main crack morphology. The possible mechanism of the effect of laser processing on band formation, serrated deformation, and alloy strength are discussed.
ISSN:1063-7834
1090-6460
DOI:10.1134/S1063783419080249