The Structure and Decomposition of Zr and Ti B.C.C. Solid Solutions.
Abstract
The literature concerning the decomposition of Zr and Ti alloys is reviewed with particular emphasis on the b.c.c. (beta) to athermal omega transformation and the structure of Zr and Ti b.c.c. solid solutions. Illustrative examples are taken principally from the Zr-Nb and Ti-Nb systems. High resolution dark field electron microscopy, diffraction and ultrasonic techniques have been used to follow the beta to omega phase transformation in Zr and Ti alloys. The omega morphology was shown to consist of 10-15A diameter particles arranged in <111> rows. As well, clusters of rows were present in low solute content alloys and the cluster size decreased with increasing solute content. The mechanism of the transformation is discussed in terms of instability or metastability of the b.c.c. structure relative to a 2/3 <111> longitudinal displacement wave. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Dec 16, 1971
- Accession Number
- AD0738092
Entities
People
- Stephen L. Sass
Organizations
- Cornell University College of Engineering