• français
    • English
    français
  • Login
Help
View Item 
  •   Home
  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)
  • View Item
  • Home
  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)
  • View Item
JavaScript is disabled for your browser. Some features of this site may not work without it.

Study of Mechanical Properties of AZ91 Magnesium Alloy Welded by Laser Process Taking into Account the Anisotropy Microhardness and Residual Stresses by X-Ray Diffraction

Article dans une revue avec comité de lecture
Author
KOUADRI, AFIA
25157 Laboratoire de Génie Civil et Génie Mécanique [LGCGM]
BARRALLIER, Laurent
128006 MECASURF [MECASURF]

URI
http://hdl.handle.net/10985/6686
DOI
http://dx.doi.org/10.1016/j.msea.2006.03.100
Date
2006
Journal
Materials Science and Engineering: A

Abstract

The objective was to study the mechanical properties of a magnesium alloy welded by a CO2 laser. Residual stresses were measured by X-ray diffraction. They were calculated by the classic sin2Y method in the isotropic zones by using the orientation distribution function (ODF) in the textured zones. The results demonstrated that laser welding results in the formation of a number of different zones with different microstructural and mechanical properties. Welding principally leads to a reduction in grain size and a new distribution of phases. The most remarkable observation was that of a superficial layer on the surface of the welded zone. This layer has the peculiarity of a marked crystallographic texture, a reduction in the level of aluminium as well as an elevated microhardness. These characteristics disappear after a depth of 200μm under the welded zone. These modifications can be explained by the nature of the solidification which occurs under nonequilibrium conditions resulting in an equiaxial columnar transition. This transition is also evident within the profile of residual tensile stresses which are at their maximum at the interface between the superficial layer and the rest of the welded zone. These results are explained by the anisotropic properties of the textured layer in relation to the plasticity.

Files in this item

Name:
Full-Publication4.pdf
Size:
1.823Mb
Format:
PDF
Description:
Document article
View/Open

Collections

  • Laboratoire Mechanics, Surfaces and Materials Processing (MSMP)

Related items

Showing items related by title, author, creator and subject.

  • Mechanical properties, microstructure and crystallographic texture of magnesium AZ91-D alloy welded by Friction Stir Welding (FSW) 
    Article dans une revue avec comité de lecture
    KOUADRI-HENNI, Afia; BARRALLIER, Laurent (Springer Verlag/ASM International, 2014)
    The objective of the study was to characterize the properties of a magnesium alloy welded by friction stir welding (FSW). The results led to a better understanding of the relationship between this process and the microstructure ...
  • Micromechanical behavior of UO2: crystalline anisotropy and associated internal stressezs in polycrystals 
    Communication avec acte
    SOULACROIX, Julian; MICHEL, Bruno; GATT, Jean-Marie; BARRALLIER, Laurent; ccKUBLER, Regis (2013)
    Uranium dioxide is the standard nuclear fuel for pressurized water reactors in France. This ceramic is manufactured by sintering. The standard shape for use in nuclear reactor is a small cylinder, also called “pellet”, ...
  • An ageing elasto-viscoplastic model for ceramics 
    Article dans une revue avec comité de lecture
    SOULACROIX, Julian; MICHEL, Bruno; GATT, Jean-Marie; BARRALLIER, Laurent; ccKUBLER, Regis (Elsevier, 2014)
    A model reproducing strain softening behavior in ceramic materials is proposed, base on a critical treatment of previous mechanical experimental results on uranium dioxide. The main hypothesis is that the strain softening ...
  • Evolution of residual stresses during short time nitriding of 33CrMoV12-9 steel grade 
    Article dans une revue avec comité de lecture
    FALLOT, Guillaume; BARRALLIER, Laurent; ccJÉGOU, Sébastien (Trans Tech Publications, 2014)
    The evolution of residual stresses during short time gas nitriding of 33CrMoV12-9 steel grade is studied. It aims understanding the influence of nitriding parameters (temperature T and nitriding potential Kn) on the ...
  • On the twinning impact on the grain structure formation of multi-crystalline silicon for photovoltaic applications during directional solidification 
    Article dans une revue avec comité de lecture
    RIBERI-BÉRIDOT, Thècle; MANGELINCK-NOËL, Nathalie; TANDJAOUI, Amina; REINHART, Guillaume; BILLIA, Bernard; LAFFORD, Tamzin; BARUCHEL, José; BARRALLIER, Laurent (Elsevier, 2015)
    Grain orientation and competition during growth has been analyzed in directionally solidified multi-crystalline silicon samples. In situ and real-time characterization of the evolution of the grain structure during growth ...

Browse

All SAMCommunities & CollectionsAuthorsIssue DateCenter / InstitutionThis CollectionAuthorsIssue DateCenter / Institution

Newsletter

Latest newsletterPrevious newsletters

Statistics

Most Popular ItemsStatistics by CountryMost Popular Authors

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales

ÉCOLE NATIONALE SUPERIEURE D'ARTS ET METIERS

  • Contact
  • Mentions légales