Stability and Aging of Candidate Alloys for the Yucca Mountain Project: CALPHAD Results

P. E.A. Turchi, L. Kaufman, Zi-kui Liu

Research output: Contribution to journalConference articlepeer-review

3 Scopus citations


The CALPHAD approach is applied to the study of stability and aging of several Ni-Cr-Mo alloys similar to those considered for use in waste disposal containers for the Yucca Mountain Project (YMP). The stability of occurring phases in the as-fabricated materials must be investigated since their precipitation with time at temperature can reduce their corrosion resistance and mechanical properties. We first show that excellent agreement exists between assessed and calculated phase diagrams for the three major binary alloys, Ni-Cr, Ni-Mo, and Cr-Mo, and for the ternary Ni-Cr-Mo alloy. Then we present a comparative study of phase fractions versus temperature for the nominal composition of several multi-component Ni-Cr-Mo alloys. Finally we discuss the aging properties of the Ni 2Cr-ordered phase in Ni-Cr and in Ni-Cr-Mo alloys, and of the complex P phase in Alloy 22.

Original languageEnglish (US)
Pages (from-to)729-734
Number of pages6
JournalMaterials Research Society Symposium - Proceedings
StatePublished - Dec 8 2003
EventMATERIALS RESEARCH SOCIETY SYMPOSIUM PROCEEDING: Scientific Basis for Nuclear Waste Management XXVI - Boston, MA, United States
Duration: Dec 2 2002Dec 5 2002

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering


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