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Metallurgical and Materials Transactions A

, Volume 37, Issue 4, pp 1267–1280 | Cite as

Effect of composition on the solidification behavior of several Ni-Cr-Mo and Fe-Ni-Cr-Mo alloys

  • M. J. Perricone
  • J. N. Dupont
Article

Abstract

The microstructural development of several Ni-Cr-Mo and Fe-Ni-Cr-Mo alloys over a range of conditions has been examined. A commercial alloy, AL-6XN, was chosen for analysis along with three experimental compositions to isolate the contribution of individual alloying elements to the overall microstructural development. Detailed microstructural characterization on each alloy demonstrated that the observed solidification reaction sequences were primarily dependent on the segregation behavior of molybdenum (Mo), which was unaffected by the large difference in cooling rate between differential thermal analysis (DTA) samples and welded specimens. This explains the invariance of the amount of eutectic constituent observed in the microstructure in the welded and DTA conditions. Multicomponent liquidus projections developed using the CALPHAD approach were combined with solidification path calculations as a first step to understanding the observed solidification reaction sequences. Discrepancies between the calculations and observed reaction sequences were resolved by proposing slight modifications to the calculated multicomponent liquidus projections.

Keywords

Material Transaction Fusion Zone Interdendritic Region Experimental Alloy Liquidus Projection 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© ASM International & TMS-The Minerals, Metals and Materials Society 2006

Authors and Affiliations

  • M. J. Perricone
    • 1
    • 2
  • J. N. Dupont
    • 3
  1. 1.Department of Materials Science and EngineeringLehigh UniversityUSA
  2. 2.Joining and Coatings DivisionSandia National Laboratories, Albuquerque
  3. 3.Department of Materials Science and EngineeringLehigh UniversityBethlehem

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