Abstract
A method is proposed for calculating the variation in fraction liquid with distance in the mushy zone as an aid to determining the effect of alloy additions on solidification cracking susceptibility. The model combines the general liquidus equation of a multicomponent system, solute redistribution relations, and temperature gradient information. Calculations are presented for a range of niobium bearing superalloys and the results were found to reveal important relations between alloy composition, variation in fraction liquid with distance in the mushy zone, and cracking susceptibility as measured by the Varestraint test. In particular, the results directly show that the addition of carbon to these alloys is generally beneficial because it reduces the size of the crack susceptible mushy zone and limits the amount of terminal liquid available for the low temperature L → γ + Laves reaction. The modelling results and experimental data are also used to describe the influence of other alloy additions.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
