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Environmentally induced crack (EIC) initiation, propagation, and failure: A 3D in-situ time-lapse study of AA5083 H131

DOI: 10.1016/j.corsci.2020.108834 DOI Help

Authors: Visweswara Chakravarthy Gudla (The University of Manchester) , Malte Storm (Diamond Light Source) , Benjamin C. Palmer (Case Western Reserve University) , John J. Lewandowski (Case Western Reserve University) , Philip J. Withers (The University of Manchester) , N. J. Henry Holroyd (The University of Manchester; Case Western Reserve University; The University of Manchester) , Timothy L. Burnett (he University of Manchester)
Co-authored by industrial partner: No

Type: Journal Paper
Journal: Corrosion Science

State: Published (Approved)
Published: June 2020
Diamond Proposal Number(s): 18165

Abstract: Environment Induced Cracking (EIC) has been observed in three dimensions (3D) at high spatial and temporal resolution for AA5083 H131 alloy using in situ synchrotron X-ray CT. The initiation of EIC cracks occurred in humid air at ∼0.5σy and started from corrosion sites associated with intermetallic particle clusters. Time-resolved monitoring of the crack growth confirmed cracks grow below threshold KIEIC and are susceptible to arrest under fixed displacement conditions. Even when the cracks exceed threshold KIEIC and enter sustained propagation they exhibit very uneven growth rates. Failure occurs when the K of the largest crack exceeds the fracture toughness KIC.

Journal Keywords: Aluminium; Intermetallics; Effects of Strain; Hydrogen Embrittlement; Intergranular Corrosion; Stress Corrosion

Diamond Keywords: Alloys

Subject Areas: Materials, Engineering

Instruments: I13-2-Diamond Manchester Imaging

Added On: 01/07/2020 08:30

Discipline Tags:

Materials Engineering & Processes Corrosion Materials Science Engineering & Technology Metallurgy

Technical Tags:

Imaging Tomography