Reference : Reverting foundry nickel-base superalloys
Scientific congresses and symposiums : Paper published in a book
Engineering, computing & technology : Chemical engineering
Engineering, computing & technology : Materials science & engineering
http://hdl.handle.net/2268/25681
Reverting foundry nickel-base superalloys
English
Lamberigts, M. [Centre de Recherche Métalurgique - CRM > > > >]
Lecomte-Beckers, Jacqueline mailto [Université de Liège - ULg > Département d'aérospatiale et mécanique > Science des matériaux métalliques >]
Drapier, J.-M. [F.N.-division Formetal, Herstal > > > >]
1986
International Conference on High Temperature Alloys for Gas Turbine and Other Applications
kluwer
745-756
Yes
International
International Conference on High Temperature Alloys for Gas Turbine and Other Applications
Liège
Belgium
[en] soundness defects ; property degradations ; grain size ; carbide ; metallography ; precipitation feature ; microporosity
[en] This work was part of a COST 50 project aimed at ways to make revert IN 100 less prone to soundness defects and associated property degradations. It was based on carrots cast from 5 master distinct master melts, which were evaluated through metallography and Differential Thermal Analysis. Recycling was shown to affect grain size and morphology, carbide precipitation features, eutectic pool distribution and above all, microporosity level. The experimental evidence strongly suggests that, in revert master melts, carbides grow onto pre—existent nuclei made of TiN. This in turn reduces total heat of solidification, thus making the residual liquid substantially less fluid and consequently less capable of coxnpensating for solidification shrinkage in a dendrite structure which is more “tortuous”, because of its lower maturation rates. The effects of recycling can therefore be better accounted for in terms of bound nitrogen rather than of gas content as such.
Researchers ; Professionals ; Students
http://hdl.handle.net/2268/25681

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