Effect of microstructure on corrosion behavior of a Zr–Sn–Nb–Fe–Cu–O alloy. (15th February 2016)

• Record Type: Journal Article
• Authors: Chen, Liangyu; Zeng, Qifeng; Li, Jiuxiao; Lu, Junqiang; Zhang, Yao; Zhang, Lai-Chang; Qin, Xujuan; Lu, Weijie; Zhang, Lefu; Wang, Liqiang; Zhang, Di
• Is Part Of: Materials & design. Volume 92(2016)
• Page Start: 888
• Page End: 896
• Publication Date: 2016-02-15
• Subjects: Zirconium -- Microstructure -- Corrosion kinetics -- Undulation -- Tensile property -- Second phase particle; Materials -- Periodicals; Engineering design -- Periodicals; Matériaux -- Périodiques; Conception technique -- Périodiques; Electronic journals; 620.11
• DOI: 10.1016/j.matdes.2015.12.067
• Languages: English
• ISSNs: 0264-1275

Abstract

Abstract: This work investigates the effect of microstructure on tensile properties and corrosion behavior of a Zr–Sn–Nb–Fe–Cu–O alloy. Scanning electron microscope, transmission electron microscope, electron back scattering diffraction, tensile tests and autoclave corrosion test were jointly carried out to characterize in detail the microstructural features and properties of the alloy studied. The corrosion rate constant increases with decreasing the degree of recrystallization. The sample with slower evolution of undulated interface exhibits higher tensile strength and possesses better corrosion resistance. The plasticity of sample can hardly be the rigorous limitation on corrosion performance, which is attributed to the consistent consummation of the deformed substrate around the interface during corrosion to make the inner undeformed substrate become fresh interface. Furthermore, second phase particles (SPPs) may play a role in the nucleation of cracks in the oxide. Graphical abstract: The Zr–0.5Sn–0.3Fe–0.35Nb–0.05Cu–0.08O alloy samples with different microstructures are obtained by three kinds of processing procedure. The correlation among microstructures, tensile properties and corrosion behavior have been investigated in detail. A schematic illustration which is used to describe the corrosion mechanism is particularly elucidated in the manuscript concerns the deformation and consumption of local metal substrate. Highlights: The corrosion rate constant increases as decreasing the degree of recrystallization. The sample with higher tensile strength possesses better corrosion resistance. The plasticity of sample can hardly be a rigorous limitation on corrosion resistance. Second phase particles might play a role in the nucleation of cracks in the oxide.