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[43580] Artykuł:

The microstructure of the surface layer of magnesium laser alloyed with aluminum and silicon

Czasopismo: Materials Characterization   Tom: 118, Strony: 505-513
ISSN:  1044-5803
Wydawca:  ELSEVIER SCIENCE INC, 360 PARK AVE SOUTH, NEW YORK, NY 10010-1710 USA
Opublikowano: Sierpień 2016
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Procent
udziału		 Liczba
punktów
Andrzej Dziadoń orcid logoWMiBMKatedra Technik Komputerowych i Uzbrojenia**3320.00  
Renata Mola orcid logoWMiBMKatedra Technik Komputerowych i Uzbrojenia**3320.00  
Ludwik Błaż33.00  

Grupa MNiSW:  Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A)
Punkty MNiSW: 40
Klasyfikacja Web of Science: Article

DOI LogoDOI     Web of Science Logo Web of Science    
Keywords:

Magnesium  Laser surface alloying  Intermetallic phases  Microstructure  Wear resistance  Corrosion resistance 


Abstract:

The surface layer under analysis was formed as a result of diffusion bonding of a thin AlSi20 plate to a magnesium substrate followed by laser melting. Depending on the process parameters, the laser beam melted the AlSi20 plate only or the AlSi20 plate and a layer of the magnesium surface adjacent to it. Two types of microstructure of the remelted layer were thus analyzed. If the melting zone was limited to the AlSi20 plate, the microstructure of the surface layer was typical of a rapidly solidified hypereutectic Al-Si alloy. Since, however, the liquid AlSi20 reacted with the magnesium substrate, the following intermetallic phases formed: Al3Mg2, Mg17Al12 and Mg2Si. The microstructure of the modified surface layer of magnesium was examined using optical, scanning electron and transmission electron microscopy. The analysis of the surface properties of the laser modified magnesium revealed that the thin layer has a microstructure of a rapidly solidified Al-Si alloy offering good protection against corrosion. By contrast, the surface layer containing particles of intermetallic phases was more resistant to abrasion but had lower corrosion resistance than the silumin type layer. (C) 2016 Elsevier Inc. All rights reserved.


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