Characterization of fatigue crack growth behavior in LENS fabricated Ti-6Al-4V using high-energy synchrotron x-ray microtomography

Sandgren, Hayley R.; Zhai, Yuwei; Lados, Diana A.; Shade, Paul A.; Schuren, Jay C.; Groeber, Michael A.; Kenesei, Peter; Gavras, Anastasios G.

doi:10.1016/j.addma.2016.09.002

Title: Characterization of fatigue crack growth behavior in LENS fabricated Ti-6Al-4V using high-energy synchrotron x-ray microtomography

Journal Article · Wed Sep 28 00:00:00 EDT 2016 · Additive Manufacturing

DOI:https://doi.org/10.1016/j.addma.2016.09.002· OSTI ID:1394646

Sandgren, Hayley R. ^[1]; Zhai, Yuwei ^[2]; Lados, Diana A. ^[2]; Shade, Paul A. ^[3]; Schuren, Jay C. ^[4]; Groeber, Michael A. ^[3]; Kenesei, Peter ^[5]; Gavras, Anastasios G. ^[6]

General Dynamics Electric Boat, Groton, CT (United States)
Worcester Polytechnic Institute, Worcester, MA (United States)
Air Force Research Lab., Wright-Patterson AFB, OH (United States)
Nutonian Inc., Somerville, MA (United States)
Argonne National Lab. (ANL), Argonne, IL (United States)
Babcock Power, Worcester, MA (United States)

Laser Engineered Net Shaping (LENS) is an additive manufacturing technique that belongs to the ASTM standardized directed energy deposition category. To date, very limited work has been conducted towards understanding the fatigue crack growth behavior of LENS fabricated materials, which hinders the widespread adoption of this technology for high-integrity structural applications. In this study, the propagation of a 20 μm initial crack in LENS fabricated Ti-6Al-4V was captured in-situ, using high-energy synchrotron x-ray microtomography. Fatigue crack growth (FCG) data were then determined from 2D and 3D tomography reconstructions, as well as from fracture surface striation measurements using SEM. The generated data were compared to those obtained from conventional FCG tests that used compliance and direct current potential drop (DCPD) techniques to measure long and small crack growth. In conclusion, the observed agreement demonstrates that x-ray microtomography and fractographic analysis using SEM can be successfully combined to study the propagation behavior of fatigue cracks.

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Research Organization:: Argonne National Laboratory (ANL), Argonne, IL (United States)

Sponsoring Organization:: USDOE Office of Science (SC), Basic Energy Sciences (BES)

Grant/Contract Number:: AC02-06CH11357; DEAC02-06CH11357

OSTI ID:: 1394646

Alternate ID(s):: OSTI ID: 1397461

Journal Information:: Additive Manufacturing, Vol. 12, Issue PA; ISSN 2214-8604

Publisher:: ElsevierCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 43 works

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Microstructure characterisation of Ti-6Al-4V from different additive manufacturing processes Neikter, M.; Åkerfeldt, P.; Pederson, R. IOP Conference Series: Materials Science and Engineering, Vol. 258 https://doi.org/10.1088/1757-899x/258/1/012007	journal	October 2017
P-S-N Curve Description of Laser Metal Deposition Ti-6.5Al-2Zr-1Mo-1V Titanium Alloy after Duplex Annealing Wang, Tianshuai; He, Xiaofan; Wang, Xiaobo Materials, Vol. 12, Issue 3 https://doi.org/10.3390/ma12030418	journal	January 2019
State of the Art in Directed Energy Deposition: From Additive Manufacturing to Materials Design Dass, Adrita; Moridi, Atieh Coatings, Vol. 9, Issue 7 https://doi.org/10.3390/coatings9070418	journal	June 2019
Crystallographic character of grain boundaries resistant to hydrogen-assisted fracture in Ni-base alloy 725 Hanson, John P.; Bagri, Akbar; Lind, Jonathan Nature Communications, Vol. 9, Issue 1 https://doi.org/10.1038/s41467-018-05549-y	journal	August 2018
Crack Growth in a Range of Additively Manufactured Aerospace Structural Materials Iliopoulos, Athanasios; Jones, Rhys; Michopoulos, John Aerospace, Vol. 5, Issue 4 https://doi.org/10.3390/aerospace5040118	journal	November 2018

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