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

K. Y. Yu, D. Bufford, Y. Chen, Y. Liu, H. Wang, X. Zhang

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

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.

Original languageEnglish (US)
Article number181903
JournalApplied Physics Letters
Volume103
Issue number18
DOIs
StatePublished - Oct 28 2013

Bibliographical note

Funding Information:
The work on twinning in Al was supported by DoE-OBES under Grant No. DE-SC0010482. The work on Cu/Fe and Cu/Ni multilayer was partially supported by NSF-CMMI under Grant No. 1129065. Access to DOE-Center for Integrated Nanotechnologies (CINT) at Los Alamos and Sandia National Laboratories and Microscopy and Imaging Center at Texas A&M University is also acknowledged.

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