The structure of hcp-bcc interfaces in a Zr-Nb alloy

Journal Article · Fri Jun 12 00:00:00 EDT 1998 · Acta Materialia

DOI:https://doi.org/10.1016/S1359-6454(98)00047-0· OSTI ID:638311

Zhang, W Z ^[1]; Perovic, V ^[2]; Perovic, A; Weatherly, G C; Purdy, G R ^[3]

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1. Tsinghua Univ., Beijing (China). Dept. of Materials Science and Engineering
2. Ontario Hydro Technologies, Toronto (Canada)
3. McMaster Univ., Hamilton, Ontario (Canada)

Conventional and lattice resolution transmission electron microscopy have been used to study the interface structure of {beta}(b.c.c.) particles in the {alpha}(h.c.p.) matrix of a Zr-Nb alloy. The misfit at the habit plane is accommodated by a single set of [010]{sub {beta}} dislocations lying along the invariant line. At the side facet planes, a combination of two or three different sets of dislocations, [1{bar 1}1]{sub {beta}}, [111]{sub {beta}} and [001]{sub {beta}}, again lying along the invariant line, are required to relieve the misfit. The geometry of prominent facets, as well as the densities of the different dislocations (steps) required for strain relief at each facet, are found to be in excellent agreement with the predictions of a model based on an invariant line strain transformation.

• OSTI ID: 638311
• Journal Information: Acta Materialia, Vol. 46, Issue 10; Other Information: PBD: 12 Jun 1998
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CRYSTAL STRUCTURE
ZIRCONIUM ALLOYS
NIOBIUM ALLOYS
INTERFACES
HCP LATTICES
BCC LATTICES
DISLOCATIONS
PREDICTION EQUATIONS