Details

Title

Structural Aspects of Remelting of the AZ91 Magnesium Alloy Surface Layer

Journal title

Archives of Foundry Engineering

Yearbook

2016

Numer

No 1

Publication authors

Keywords

Structure ; Magnesium alloy ; Laser remelting

Divisions of PAS

Nauki Techniczne

Description

Archives of Foundry Engineering continues the publishing activity started by Foundry Commission of the Polish Academy of Sciences (PAN) in Katowice in 1978. The initiator of it was the first Chairman Professor Dr Eng. Wacław Sakwa – Corresponding Member of PAN, Honorary Doctor of Czestochowa University of Technology and Silesian University of Technology. This periodical first name was „Solidification of Metals and Alloys” , and made possible to publish the results of works achieved in the field of the Basic Problems Research Cooperation. The subject of publications was related to the title of the periodical and concerned widely understand problems of metals and alloys crystallization in a casting mold. In 1978-2000 the 44 issues have been published. Since 2001 the Foundry Commission has had patronage of the annually published “Archives of Foundry” and since 2007 quarterly published “Archives of Foundry Engineering”. Thematic scope includes scientific issues of foundry industry:

  • Theoretical Aspects of Casting Processes,
  • Innovative Foundry Technologies and Materials,
  • Foundry Processes Computer Aiding,
  • Mechanization, Automation and Robotics in Foundry,
  • Transport Systems in Foundry,
  • Castings Quality Management,
  • Environmental Protection.

Abstract

In this study, modification of the AZ91 magnesium alloy surface layer with a CO2 continuous wave operation laser has been taken on. The

extent and character of structural changes generated in the surface layer of the material was being assessed on the basis of both macro- and

microscopy investigations, and the EDX analysis. Considerable changes in the structure of the AZ91 alloy surface layer and the

morphology of phases have been found. The remelting processing was accompanied by a strong refinement of the structure and a more

uniform distribution of individual phases. The conducted investigations showed that the remelting zone dimensions are a result of the

process parameters, and that they can be controlled by an appropriate combination of basic remelting parameters, i.e. the laser power, the

distance from the sample surface, and the scanning rate. The investigations and the obtained results revealed the possibility of an effective

modification of the AZ91 magnesium alloy surface layer in the process of remelting carried out with a CO2 laser beam.

Publisher

The Katowice Branch of the Polish Academy of Sciences

Date

2016

Type

Artykuły / Articles

Identifier

ISSN 2299-2944

References

Poza (2014), Mechanical properties of cold - sprayed coatings after laser remelting Depth sensing indentation analysis Surface, Coatings Technology, 625. ; Yang (2009), Improving wear resistance of magnesium alloys by laser cladding with Al - Si powders, Materials Letters, 63. ; Matejicek (2014), Laser Remelting of Plasma - Sprayed Tungsten Coatings of Thermal Spray Technology, Journal, 23, 750. ; Opiekun (2010), Residual stresses in a surface remelting of castings made of cobalt alloy MAR - with a plasma generated in electric arc of Foundry Engineering, Archives, 10, 509. ; Chakraborty Banerjee (2011), Electrochemical investigation of the influence of laser surface melting on the microstructure and corrosion behaviour of magnesium alloy An EIS based study, Corrosion Science, 41. ; Jun (2008), Characterization and wear resistance of laser surface melting alloy of Alloys and Compounds, Journal, 455. ; Orłowicz (2009), Friction wear cast iron casting surface hardened by concentrated source of heat of Foundry Engineering, Archives, 9, 189. ; Szafarska (2012), Laser remelting treatment of plasma - sprayed oxide coatings of Metallurgy and Materials, Archives, 57, 215. ; Dziedzic (2011), The influence of remelting parameters of the electric arc and conventional tempering on the tribological resistance of high speed steel of Foundry Engineering, Archives, 6, 31. ; Blau (2000), Sliging friction and wear of magnesium alloys produced by two different methods, Tribology International, 33. ; Čižek (2004), Study of selected properties of magnesium alloy after heat treatment and forming of Materials Processing Technology, Journal, 91. ; Iwaszko (2012), Remelting treatment of the non - conductive oxide coatings by means of the modified GTAW method Surface, Coatings Technology, 206. ; Bochnowski (2011), Influence of parameters GTAW remelting process on the tribological properties of the bearing steel of Foundry Engineering, Archives, 11, 43.

DOI

10.1515/afe-2015-0095

×