Combining Fractography with High-Energy x-Ray Diffraction to Study Fatigue Crack Growth in Ti-6Al-4V

A. L. Pilchak; A. J. Beaudoin; D. C. Pagan; K. Chatterjee; K. Swartz; C. Budrow; N. Levkulich; Vikas Sinha

doi:10.1007/s11837-019-03826-9

Combining Fractography with High-Energy x-Ray Diffraction to Study Fatigue Crack Growth in Ti-6Al-4V

A. L. Pilchak, A. J. Beaudoin, D. C. Pagan, K. Chatterjee, K. Swartz, C. Budrow, N. Levkulich, Vikas Sinha

Materials Science and Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

Fatigue crack growth in Ti-6Al-4V has been explored through the combined use of high-energy x-ray diffraction (HEXD) analysis, electron backscatter diffraction analysis, and fractography to draw a connection between the driving forces and micromechanisms of fatigue crack growth. Samples were prepared from a forging with two configurations, viz. with the crack plane either perpendicular or parallel to the primary extension direction of the forging. Crack growth was examined in situ by mapping the lattice strain fields using HEXD for loading at R = 0.1 and R = 0.7. The crack growth as assessed by HEXD was contrasted with predictions of linear elastic fracture mechanics. The variation in the lattice strain field with crystallographic orientation was assessed.At the microscale, a clear correlation between the availability of c-axes along the loading direction and facet formation was found.

Original language	English (US)
Pages (from-to)	91-100
Number of pages	10
Journal	JOM
Volume	72
Issue number	1
DOIs	https://doi.org/10.1007/s11837-019-03826-9
State	Published - Jan 1 2020

All Science Journal Classification (ASJC) codes

Materials Science(all)
Engineering(all)

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title = "Combining Fractography with High-Energy x-Ray Diffraction to Study Fatigue Crack Growth in Ti-6Al-4V",

abstract = "Fatigue crack growth in Ti-6Al-4V has been explored through the combined use of high-energy x-ray diffraction (HEXD) analysis, electron backscatter diffraction analysis, and fractography to draw a connection between the driving forces and micromechanisms of fatigue crack growth. Samples were prepared from a forging with two configurations, viz. with the crack plane either perpendicular or parallel to the primary extension direction of the forging. Crack growth was examined in situ by mapping the lattice strain fields using HEXD for loading at R = 0.1 and R = 0.7. The crack growth as assessed by HEXD was contrasted with predictions of linear elastic fracture mechanics. The variation in the lattice strain field with crystallographic orientation was assessed.At the microscale, a clear correlation between the availability of c-axes along the loading direction and facet formation was found.",

author = "Pilchak, {A. L.} and Beaudoin, {A. J.} and Pagan, {D. C.} and K. Chatterjee and K. Swartz and C. Budrow and N. Levkulich and Vikas Sinha",

note = "Funding Information: This work is based upon research conducted at the Cornell High Energy Synchrotron Source (CHESS), which is supported by the National Science Foundation and the National Institutes of Health/National Institute of General Medical Sciences under NSF Award DMR-1332208. ALP acknowledges the support of AFRL management during the completion of this work. NCL and VS were supported by the Air Force Research Laboratory on Contract FA8650-15-D-5205. AJB, KC, and KS received support through the Air Force Office of Scientific Research under Contract No. FA9550-14-1-0369. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations. ",

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AU - Chatterjee, K.

AU - Swartz, K.

AU - Budrow, C.

AU - Levkulich, N.

AU - Sinha, Vikas

N1 - Funding Information: This work is based upon research conducted at the Cornell High Energy Synchrotron Source (CHESS), which is supported by the National Science Foundation and the National Institutes of Health/National Institute of General Medical Sciences under NSF Award DMR-1332208. ALP acknowledges the support of AFRL management during the completion of this work. NCL and VS were supported by the Air Force Research Laboratory on Contract FA8650-15-D-5205. AJB, KC, and KS received support through the Air Force Office of Scientific Research under Contract No. FA9550-14-1-0369. Springer Nature remains neutral with regard to jurisdictional claims in published maps and institutional affiliations.

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Y1 - 2020/1/1

N2 - Fatigue crack growth in Ti-6Al-4V has been explored through the combined use of high-energy x-ray diffraction (HEXD) analysis, electron backscatter diffraction analysis, and fractography to draw a connection between the driving forces and micromechanisms of fatigue crack growth. Samples were prepared from a forging with two configurations, viz. with the crack plane either perpendicular or parallel to the primary extension direction of the forging. Crack growth was examined in situ by mapping the lattice strain fields using HEXD for loading at R = 0.1 and R = 0.7. The crack growth as assessed by HEXD was contrasted with predictions of linear elastic fracture mechanics. The variation in the lattice strain field with crystallographic orientation was assessed.At the microscale, a clear correlation between the availability of c-axes along the loading direction and facet formation was found.

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