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The Journal of Research of the National Institute of Standards and Technology is a publication of the U.S. Government. The papers are in the public domain and are not subject to copyright in the United States. Articles from J Res may contain photographs or illustrations copyrighted by other commercial organizations or individuals that may not be used without obtaining prior approval from the holder of the copyright.
A sequence of ω-related phases formed from the high temperature B2 (ordered BCC) phase in the Ti4AI3Nb alloy is summarized in the form of maximal group-subgroup relationship. Dark field images A and B show microstructures of (A) metastable ω′ phase and (B) a mixture of ω″ and B82 phases.