3D time-resolved observations of corrosion and corrosion-fatigue crack initiation and growth in peak-aged Al 7075 using synchrotron X-ray tomography

Tyler J. Stannard, Jason J. Williams, Sudhanshu S. Singh, Arun Sundar Sundaram Singaravelu, Xianghui Xiao, Nikhilesh Chawla

Research output: Contribution to journalArticle

6 Citations (Scopus)

Abstract

Corrosion fatigue crack initiation and growth from corrosion pits in 7075 aluminium alloys was observed in situ using 3D x-ray synchrotron tomography. Peak-aged Al 7075 was corroded by soaking in 3.5 wt.% NaCl solution, then fatigue tested in situ in the solution using synchrotron X-ray tomography to analyse the corrosion fatigue crack initiation and growth from the pits. Hydrogen bubbles were observed within the intergranular corrosion fatigue cracks, indicating chemical changes in the sample during corrosion fatigue. In situ crack growth, the effect of microstructural constituents on dissolution and growth, and multimodal observations of the fracture surface were conducted and are discussed.

Original languageEnglish (US)
JournalCorrosion Science
DOIs
StateAccepted/In press - Jan 1 2018

Fingerprint

Corrosion fatigue
Synchrotrons
Crack initiation
Tomography
Crack propagation
Corrosion
X rays
Hydrogen
Aluminum alloys
Dissolution
Fatigue of materials
Fatigue cracks

Keywords

  • A. Alloy
  • A. Aluminium
  • B. SEM
  • C. Corrosion fatigue
  • C. Hydrogen embrittlement

ASJC Scopus subject areas

  • Chemistry(all)
  • Chemical Engineering(all)
  • Materials Science(all)

Cite this

3D time-resolved observations of corrosion and corrosion-fatigue crack initiation and growth in peak-aged Al 7075 using synchrotron X-ray tomography. / Stannard, Tyler J.; Williams, Jason J.; Singh, Sudhanshu S.; Sundaram Singaravelu, Arun Sundar; Xiao, Xianghui; Chawla, Nikhilesh.

In: Corrosion Science, 01.01.2018.

Research output: Contribution to journalArticle

Stannard, Tyler J. ; Williams, Jason J. ; Singh, Sudhanshu S. ; Sundaram Singaravelu, Arun Sundar ; Xiao, Xianghui ; Chawla, Nikhilesh. / 3D time-resolved observations of corrosion and corrosion-fatigue crack initiation and growth in peak-aged Al 7075 using synchrotron X-ray tomography. In: Corrosion Science. 2018.
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