The effect of γ-phase particles on microstructure and properties of Co-Ni-Ga alloys

Krystian Prusik ,  Henryk Morawiec ,  Beata Górka-Kostrubiec ,  Marcin Prewendowski ,  Grzegorz Dercz 

University of Silesia, Institute of Material Science, Bankowa 12, Katowice 40-007, Poland

Abstract

The paper concerns the determination of the role of the γ-phase particles on the microstructure and properties of Co-Ni-Ga alloys. The investigations cover the alloys of wide range of chemical composition. They show different microstructures: single phase martensite BCT( Body Centered Tetragonal) lattice with c/a >1 (a), two phase B2 +γ (b) or BCT + γ (b). The particle analysis was performed to determine the amount of the g-phase in the studied alloys. The compression test on prism samples proved that the increase of the g-phase volume fraction significantly improves the strength and plasticity of the alloys. Thus the presence of the γ-phase precipitates cause the decrease of the brittleness observed in the single phase martensitic alloys. Additionally, the influences of the orientation of the grain boundary precipitates on the mechanical properties were studied. TEM observations were preformed for specimens before and after deformation to reveal the mechanism of the γ-phase deformation. Studies of the para – to ferromagnetic and martensitic transformation were carried using different methods .

Legal notice
  • Legal notice:

    Copyright (c) Pielaszek Research, all rights reserved.
    The above materials, including auxiliary resources, are subject to Publisher's copyright and the Author(s) intellectual rights. Without limiting Author(s) rights under respective Copyright Transfer Agreement, no part of the above documents may be reproduced without the express written permission of Pielaszek Research, the Publisher. Express permission from the Author(s) is required to use the above materials for academic purposes, such as lectures or scientific presentations.
    In every case, proper references including Author(s) name(s) and URL of this webpage: http://science24.com/paper/11593 must be provided.

 

Related papers
  1. Precipitations of tungsten in quasicrystalline Al-Cu-Fe-W alloys
  2. Structure, magnetic and dielectric properties of Bi5Ti3FeO15 multiferroic ceramics after high energy ball milling and free sintering process.
  3. Texture analysis of hot rolled Ni-Mn-Ga alloys
  4. X-ray and electron microscopy techniques studies on nanocrystalline MgO powder materials prepared by sol-gel method
  5. Effect of deformation on structure and mechanical behavior of plycrystalline Ni-Mn-Ga alloys
  6. Structure of nanocrystalline powders of MgO prepared by sol-gel method
  7. Structure studies on nanocrystalline MgO powders prepared by sol-gel method dried under different conditions
  8. X-ray analysis of ground NiAl-Cr3C2-Al2O3 composite powders with nanocrystalline NiAl phase
  9. Microstructure of Ni(Cr)-Cr3C2 -Cr7C3 -TiC composite powder

Presentation: Poster at E-MRS Fall Meeting 2007, Symposium E, by Krystian Prusik
See On-line Journal of E-MRS Fall Meeting 2007

Submitted: 2007-05-14 15:32
Revised:   2009-06-07 00:44
Google
 
Web science24.com
© 1998-2021 pielaszek research, all rights reserved Powered by the Conference Engine