Basic criteria for formation of growth twins in high stacking fault energy metals

Journal Article · Mon Oct 28 04:00:00 EDT 2013 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4826917· OSTI ID:22217792

Yu, K. Y.; Zhang, X. ^[1]; Bufford, D.; Chen, Y.; Liu, Y. ^[1]; Wang, H. ^[1]

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1. Department of Materials Science and Engineering, Texas A and M University, College Station, Texas 77843 (United States)

Nanotwinned metals received significant interest lately as twin boundaries may enable simultaneous enhancement of strength, ductility, thermal stability, and radiation tolerance. However, nanotwins have been the privilege of metals with low-to-intermediate stacking fault energy (SFE). Recent scattered studies show that nanotwins could be introduced into high SFE metals, such as Al. In this paper, we examine several sputter-deposited, (111) textured Ag/Al, Cu/Ni, and Cu/Fe multilayers, wherein growth twins were observed in Al, Ni, and face-centered cubic (fcc) Fe. The comparisons lead to two important design criteria that dictate the introduction of growth twins in high SFE metals. The validity of these criteria was then examined in Ag/Ni multilayers. Furthermore, another twin formation mechanism in high SFE metals was discovered in Ag/Ni system.

• OSTI ID: 22217792
• Journal Information: Applied Physics Letters, Journal Name: Applied Physics Letters Journal Issue: 18 Vol. 103; ISSN APPLAB; ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
77 NANOSCIENCE AND NANOTECHNOLOGY
ALUMINIUM
DEPOSITION
DEPOSITS
DUCTILITY
FCC LATTICES
LAYERS
SPUTTERING
STACKING FAULTS
THIN FILMS