Extraordinary Bauschinger effect in gradient structured copper. (June 2018)

• Record Type: Journal Article
• Authors: Liu, Xiaolong; Yuan, Fuping; Zhu, Yuntian; Wu, Xiaolei
• Is Part Of: Scripta materialia. Number 150(2018)
• Page Start: 57
• Page End: 60
• Publication Date: 2018-06
• Subjects: Bauschinger effect -- Geometrically necessary dislocations -- Gradient structure -- Reverse yield softening -- Tensile-compressive test; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2018.03.007
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract: Bauschinger effect is a well-known phenomenon, in which the tensile stress is higher than the reverse compressive stress. Here we report that the gradient structured copper exhibits an extraordinarily large Bauschinger effect. We propose to use the reverse yield softening, Δ σ b, as a quantitative parameter to represent the Bauschinger effect. Δ σ b evolves in the same trend as the back stress with pre-strain, and can be used to evaluate the effectiveness of a heterostructure in producing back stress for superior mechanical properties. Graphical abstract: Unlabelled Image