The role of structural ledges as misfit-compensating defects: fcc-bcc interphase boundaries

Journal Article · Thu Sep 01 04:00:00 EDT 1994 · Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States)

DOI:https://doi.org/10.1007/BF02649037· OSTI ID:6935797

Shiflet, G J ^[1]; Van Der Merwe, J H ^[2]

---

1. Univ. of Virginia, Charlottesville, VA (United States). Dept. of Materials Science and Engineering
2. Univ. of South Africa, Pretoria (South Africa). Dept. of Physics

An energetic justification is given for structural ledges as interfacial misfit compensating defects, based on elastic considerations. The authors detail the NW-x configuration in which the orientation is imposed by close matching along the <211>fcc and <110>bcc directions and (111)fcc and (110)bcc planes, respectively. Special prominence is given to the terrace between structural ledges, where it is shown that an elastic relaxation obtains at specific terrace lengths based on atomic matching. It is this relaxation that makes a stepped interface more stable than a planar one at all meaningful values of misfit.

• OSTI ID: 6935797
• Journal Information: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States), Journal Name: Metallurgical Transactions, A (Physical Metallurgy and Materials Science); (United States) Vol. 25:9; ISSN 0360-2133; ISSN MTTABN
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals &amp; Alloys-- Structure &amp; Phase Studies
ALLOYS
BCC LATTICES
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CUBIC LATTICES
FCC LATTICES
GRAIN ORIENTATION
INTERFACES
MATHEMATICAL MODELS
MICROSTRUCTURE
ORIENTATION
PHASE TRANSFORMATIONS