DOI: https://doi.org/10.20535/2521-1943.2017.80.111363

Study of repeated laser treatment on structure and properties aged duralyumin

A. Lutay, L. Golovko, O. Kaglyak

Abstract


Abstract. Purpose. Identify areas of repeated laser treatment options alloy AA2024-T4 within which ensured the stability of its initial properties, identify the causes reduction in the strength characteristics of GR in excess of critical processing parameters
Design/methodology/approach Laser treatment was conducted on the technological complex «ROFIN DY 044" based on Nd: YAG laser diode pumped. Focal spot diameter (d) was 6mm. Treatment was carried out with a time interval between passes in 20 seconds
at processing speedsin terms V=7,5;10;15:15:30mm/s.. Resulting in the thermal zone were studied modern methods of materials science: X-ray diffraction, micro durometric, metallographic and other physic-methods Findings. Established that the critical values processing speedsin depend on the number of passes and in large quantities they should
not be less V=10mm/s. It is shown that microhardness reduction in processing at V<10mm/s. due to an increase in the average temperature of the workpiece, leading to the dissolution phase, strengthened.
Originality/value. Proved that in certain modes in the multiple laser processing allows to obtain high quality products with aged duralyumin.


Keywords


laser forming; processing; microhardness; residual stresses; dislocations

References


Lupkin, B. V. and Lagutin, A.I (2006), “Formoobrazovanie drob'ju kak metod obrabotki krupnogabaritnyh detalej slozhnoj krivizny v samoletostroenii”, Aviacionno-kosmicheskaja tehnika i tehnologija, no 2. рр. 17–20.

Malashhenko, A.Ju .(2014), Efficiency of the technological combination of bending and rolling and fracture-shaping of long-length obobodobrazuyuschih details dissertation: [Jeffektivnost' tehnologicheskogo sochetanija gibki-prokatki i drobeudarnogo formoobrazovanija dlinnomernyh obvodoobrazujushhih detalej: dis. kand. teh. nauк], Moskow, Russia.

Lupkin, B.V., Mladinov, A.I., Lagutin, V.A. and Nikitenko, V.A .(2007), Primenenie drobeudarnoj obrabotki v aviacionnoj promyshlennosti Cbornik nauchnyh trudov “Otkrytye informacionnye i komp'juternye integrirovannye tehnologii” no 36, pp.20-28.

Geiger, M. and Merklein, M. (2014), “Pitz Laser and forming technology—an idea and the way of implementation” Journal of Materials Processing Technology, Vol. 151, рр. 3–11.

Kahlyak, O.D. (2012), The shape of spatial metal structures local laser heating: dissertation [Formoutvorennya prostorovykh metalevykh konstruktsiy lokal'nym lazernym nahrivannyam: dys. kand. tekh. nauk], Kiev, Ukraine.

Watkins, K.G. and Edwardson, S.P. (2001), “Laser Forming of Aerospace Alloys” Aerospace Manufacturing Technologu Conference: Proceedings,9 Seattle, Washington, USA 10-14 September 2001, pр.12-19.

Joost, R. and Duflou, U.F. (2012), “Bending properties of locally laser heat treated AA2024-T3 aluminium alloy”, Physics Procedia, Vol. 39, pp. 257-264.

Cheng, J. and Yao,Y. (2002), “Micorstructure Integrated Modeling of Multiscan Laser Forming”, Journal of Manufacturing Science and Engineering. Vol. 124, pp. 379-387.

Knupfer, S.M. and Moore, A.J.(2010), “The effects of laser forming on the mechanical and metallurgical properties of low carbon steel and aluminium alloy samples”, Material Science and Engineering A, Vol. 527, pp. 4347-4359.

Kolachev, B.A. and Elagin, V.I. (1999), Metallovedenie i termoobrabotka cvetnyh metallov i splavov [Metallurgy and heat treatment of non-ferrous metals and alloys], Nauka, Moscow, Russia.

Smirnova, N.A. (2009), Development and investigation of the processes of hardening of the surface of aluminum alloys by laser radiation: dissertation [Razrabotka i issledovanie processov uprochnenija poverhnosti aljuminievyh splavov izlucheniem lazera: dis. kand.teh. nauk], Moskow, Russia.

Schnubel, and Huber, N. (2012), “Retardation of fatigue crack growth in aircraft aluminium alloys via laser heating – Numerical prediction of fatigue crack growth” Computational Materials Science, vol. 65, рр. 461–469.

Ber, L.B., (2007), “The practice of using x-ray methods for studying aluminum alloys (review)” [“Praktika ispol'zovaiija rentgenovskih metodov issledovanija aljuminievyh splavov (obzor)”], Zavodskaja laboratorija, no 7, vol. 73. pp. 29 – 40.


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