Thermodynamic Descriptions of NI Alloys Containing AL, CR, and RU: A Computational Thermodynamic Approach Coupled with Experiments
Final rept. 1 Feb 2003-30 Jun 2006
WISCONSIN UNIV-MADISON DEPT OF MATERIALS SCIENCE AND ENGINEERING
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Shortly after initiating this program, we focused our effort to develop thermodynamic descriptions of temary Ni-Cr-Ru and Ni-Al-Ru including the constituent binaries when needed using the traditional Calphad approach. In addition, we extended our effort to include the use of the ClusterSite Approximation CSA to describe the fcc phases in the disordered and ordered states such as the prototype Cu-Ag-Au in 20032004 and then I in real ternary systems in 20042005. In the meantime, we began to explore the possibility of using CSA to calculate interphase boundary IPB energies of coherent interfaces such as those for I ii prototype Cu-Au binary and then real binaries such as Ni-Al. The preliminary results on CSA-calculated prototype Cu-Ag-Au diagrams and IPB energies on prototype Cu-Au and Ni-Al were presented at the 2004 annual review meeting at Wintergreen, VA We subsequently discussed with Dr. C. Hartley about our IPB energy effort and were encouraged to continue this research effort as part of our program.
- Fabrication Metallurgy