Stacking-fault energy effect on zero-strain deformation twinning in nanocrystalline Cu–Zn alloys. (December 2015)

• Record Type: Journal Article
• Authors: Ma, X.L.; Zhou, H.; Narayan, J.; Zhu, Y.T.
• Is Part Of: Scripta materialia. Volume 109(2015)
• Page Start: 89
• Page End: 93
• Publication Date: 2015-12
• Subjects: Deformation twin -- Zero-strain twinning -- Nanocrystalline alloy -- Stacking-fault energy; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2015.07.027
• Languages: English
• ISSNs: 1359-6462

Abstract

Graphical abstract: Abstract: It has been reported that most deformation twins in nanocrystalline face-centered-cubic metals do not produce macroscopic strain. Here we report the decrease of zero-strain deformation twinning with decreasing stacking-fault energy. One of the two major mechanisms that produce zero-strain twinning is cooperative slip of three partials under external applied stress. Lower stacking-fault energy weakens this mechanism and statistically reduces the fraction of twins with zero-strain.