Grain growth-induced strain softening in nanocrystalline magnesium: experiments and modelling. (25th September 2019)

• Record Type: Journal Article
• Authors: He, Xu; Zhu, Linli; Liu, Jinling; An, Linan
• Is Part Of: Materials research express. Volume 6:Number 10(2019)
• Publication Date: 2019-09-25
• Subjects: magnesium -- nanocrystalline -- strain softening -- grain growth -- constitutive model; Materials science -- Research -- Periodicals; Materials science -- Periodicals; 620.11
• DOI: 10.1088/2053-1591/ab3e8e
• Languages: English
• ISSNs: 2053-1591

Abstract

Abstract: The strain softening behavior in nanocrystalline Magnesium at room temperature is investigated experimentally and theoretically. Experimental observations indicate that grain growth occurs during strain softening process. To clarify the relationship between the strain softening and grain growth, a mechanism-based plastic model is proposed to describe the stress-strain relationship with considering grain growth. The calculated results are consistent with the experimental data and demonstrate that the grain growth plays an important role in the strain softening behavior. The model further show smaller grain size could result in more remarkable softening behavior.