Cyclic deformation and fatigue damage in single-crystal magnesium under fully reversed strain-controlled tension–compression in the [1 0 1¯ 0] direction. (February 2015)

• Record Type: Journal Article
• Authors: Yu, Qin; Jiang, Yanyao; Wang, Jian
• Is Part Of: Scripta materialia. Volume 96(2015)
• Page Start: 41
• Page End: 44
• Publication Date: 2015-02
• Subjects: Magnesium single crystal -- Cyclic deformation -- Twinning–detwinning -- Fatigue; Materials -- Periodicals; Metallurgy -- Periodicals; Metalen; Legeringen; Materiaalkunde; Metals, metalworking and machinery industries; Metals; Electronic journals; 620.11
• DOI: 10.1016/j.scriptamat.2014.10.020
• Languages: English
• ISSNs: 1359-6462

Abstract

Abstract : Cyclic deformation and the resulting fatigue are experimentally investigated in single-crystal magnesium subjected to fully reversed strain-controlled tension–compression in the [1 0 1 ¯ 0] direction at room temperature. Plastic instability is found near the end of the first detwinning reversal. Twin–twin boundaries and secondary twins are induced by interaction of primary {1 0 1 ¯ 2} twins. Microcracks are developed at primary twin boundaries and twin–twin interaction sites. Final fracture is most likely caused by cleavage-cracking on the {1 0 1 ¯ 1}–{1 0 1 ¯ 2} double twin and shearing fracture on the basal plane.