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2024 | OriginalPaper | Chapter

X-Ray Computed Tomography of Fracture Paths in AA7075-T6 Sheet Torn at 200 °C

Authors : Danny Nikolai, Philip Noell, Eric Taleff

Published in: Light Metals 2024

Publisher: Springer Nature Switzerland

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Abstract

X-ray computed tomography (XRCT) was used to characterize fracture paths in AA7075-T6 sheet subjected to ductile tearing at a warm temperature. Tear tests were conducted at 200 °C, and a pulling rate of 64 mm/min until the crack tip was approximately half way through the specimen. Three-dimensional XRCT data sets were acquired near each crack tip to map the crack, nearby porosity, and intermetallic particles. The XRCT data were analyzed using modern software techniques to segment out each of the important features. The spatial relationships between these features and their anisometry suggest microstructural causes for the anisotropy of tearing resistance measured at warm temperatures; tearing resistance is lower along the sheet rolling direction than it is along the long transverse direction. These connections are discussed, and methods for improving tearing resistance are proposed.

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Title: X-Ray Computed Tomography of Fracture Paths in AA7075-T6 Sheet Torn at 200 °C
Authors: Danny Nikolai
Philip Noell
Eric Taleff
Publisher: Springer Nature Switzerland
Book: Light Metals 2024
Print ISBN: 978-3-031-50307-8

Electronic ISBN: 978-3-031-50308-5

Copyright Year: 2024
DOI: https://doi.org/10.1007/978-3-031-50308-5_22

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