Laser surface treatment of magnesium alloys with aluminium oxide powder

• Autorzy: Dobrzański L. A. , Malara S. , Tański T.
• Języki publikacji: EN

Abstrakty

EN

Purpose: The aim of this paper was to improve the magnesium cast alloys surface layer by laser surface treatment and to determine the laser treatment parameters. Design/methodology/approach: The laser treatment of magnesium alloys with alloying Al2O3 powder of the particle about 80ěm was carried out using a high power diode laser (HPDL). The resulting microstructure in the modified surface layer was examined using scanning electron microscopy. Phase composition was determined by the X-ray diffraction method using the XPert device. The measurements of microhardness of the modified surface layer were also studied. Findings: The alloyed region has a fine microstructure with hard carbide particles. Microhardness of laser surface alloyed layer was significantly improved as compared to an alloy without laser treatment. Research limitations/implications: The investigations were conducted for cast magnesium alloys MCMgAl12Zn1, MCMgAl9Zn1, MCMgAl6Zn1, MCMgAl3Zn1 and Al2O3 powder of the particle size about 80 ěm. One has used laser power in the range from 1.2 to 2.0 kW. Practical implications: The results obtained in this investigation were promising comparing with the other conventional processes. High Power Diode Laser can be used as an economical substitute of Nd: YAG and CO2 to improve the surface magnesium alloy by feeding the carbide particles. Originality/value: The value of this paper is to define the influence of laser treatment parameters on quality, microstructure and microhardness of magnesium cast alloys surface layer.

Słowa kluczowe

EN

surface treatment; magnesium alloy; laser treatment; aluminium oxide

PL

obróbka powierzchni; stop magnezowy; obróbka laserowa; tlenek glinu

• Wydawca: International OCSCO World Press
• Czasopismo: Journal of Achievements in Materials and Manufacturing Engineering
• Rocznik: 2009
• Tom: Vol. 37, nr 1
• Strony: 70--77
• Opis fizyczny: Bibliogr. 16 poz., rys., tabl.

Twórcy

autor

Dobrzański L. A.

autor

Malara S.

autor

Tański T.

• Division of Materials Processing Technology, Management and Computer Techniques in Materials Science, Institute of Engineering Materials and Biomaterials, Silesian University of Technology, ul. Konarskiego 18a, 44-100 Gliwice, Poland,

Bibliografia

• [1] H. Westengen, Magnesium Alloys: Properties and Applications Encyclopaedia of Materials: Science and Technology, 2008, 4746-4753.
• [2] L. A. Dobrzański, T. Tański, L. Cížek, Z. Brytan, Structure and properties of the magnesium casting alloys, Journal of Materials Processing Technology 192-193 (2007) 567-574.
• [3] L Cížek, R. Kocich, M. Greger, T. Tański, M. Prażmowski: Study of microstructure selected magnesium alloys, Materials Engineering 14 (2007) 21-24.
• [4] L. Cížek, L. Pawlica, R. Kocich, M. Janošec, T. Tański, M. Prażmowski, Structure and properties of Mg-Zr and Mg- Si alloys, Journal of Achievements in Materials and Manufacturing Engineering 27/2 (2008) 127-130.
• [5] L. A. Dobrzański, Descriptive Metal Science for Non- Ferrous Metals, Publishers of The Silesian University of Technology, Gliwice, 2008 (in Polish).
• [6] B. Bronfin, N. Moscovitch, New magnesium alloys for transmission parts, Metal Science and Heat Treatment 48 (2006) 479-486.
• [7] R. Alderliesten, C. Rans, R. Benedictus, The applicability of magnesium based Fibre Metal Laminates in aerospace structures, Composites Science and Technology 68 (2008) 2983-2993.
• [8] Z. Yang, J. P. Li, J. X. Zhang, G. W. Lorimer, J. Robson, Review on research and development of magnesium alloys, Acta Metallurgica Sinica 21/5 (2008) 313-328.
• [9] H. Altun, S. Sen, The effect of PVD coatings on the wear behaviour of magnesium alloys, Materials Characterization 58 (2007) 917-921.
• [10] F. Bachmann: Industrial applications of high power diode lasers in materials processing, Applied Surface Science 208-209 (2003) 125-136.
• [11] I. Yadroitsev, P. Bertrand, B. Laget, I. Smurov, Application of laser assisted technologies for fabrication of functionally graded coatings and objects for the International Thermonuclear Experimental Reactor components, Journal of Nuclear Materials 362/2-3 (2007) 189-196.
• [12] S. Barnes, N. Timms, B. Bryden, High power diode laser cladding, Journal Material Processing Technology 138 (2003) 411-416.
• [13] J. Dutta Majumdar, R. Galun, B.L. Mordike, I. Manna, Effect of laser surface melting on corrosion and wear resistance of a commercial magnesium alloy, Materials Science and Engineering A361 (2003) 119-129.
• [14] L. A. Dobrzański, J. Domagała, T. Tański, A. Klimpel, D. Janicki, Laser surface treatment of magnesium alloy with WC and TiC powders using HPDL, Journal of Achievements in Materials and Manufacturing Engineering 28/2 (2008) 179-186.
• [15] F. Vollertsen, K. Partes, J. Meijer, State of the art of laser hardening and cladding, Proceedings of the Third International WLT-Conference on Lasers in Manufacturing 2005, Munich, 2005.
• [16] Cao X., Jahazia M., Fournierb J., Alainb M., Optimization of bead spacing during laser cladding of ZE41A-T5 magnesium alloy castings, Journal of Materials Processing Technology 205 (2008) 322-331.