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Anisotropic Biaxial Creep of Textured Nb-Modified Zircaloy-4 Tubing

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Abstract

Biaxial creep of Nb-modified Zircaloy-4 (HANA-4) tubing is investigated at varied ratios of hoop and axial stresses at a constant temperature of 500 °C using internal pressurization superimposed with axial load while monitoring the hoop and axial strains using non-contact laser telemetric extensometer and linear variable differential transducer, respectively. Steady-state creep rates along the hoop and axial directions were evaluated in the power-law creep regime from which the creep locus was derived at a constant energy of dissipation. The resulting creep locus was compared with that predicted by the anisotropy parameters, R and P in the Hill’s formulation for generalized stress for anisotropic materials. Crystallographic texture of the tubing was characterized using electron backscatter diffraction technique. Research is supported by NSF grant #DMR0968825.

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Acknowledgement

This research was supported by NSF grant #DMR0968825.

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Correspondence to Nilesh Kumar .

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Kumar, N., Grundy, K., Kombaiah, B., Luan, B., Murty, K. (2017). Anisotropic Biaxial Creep of Textured Nb-Modified Zircaloy-4 Tubing. In: Charit, I., Zhu, Y., Maloy, S., Liaw, P. (eds) Mechanical and Creep Behavior of Advanced Materials. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-319-51097-2_2

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