Volume 42, Issue 9 pp. 2133-2145
SPECIAL ISSUE CONTRIBUTION

Progressive failure monitoring and analysis in aluminium by in situ nondestructive evaluation

Brian J. Wisner

Brian J. Wisner

Department of Mechanical Engineering, Russ College of Engineering and Technology, Ohio University, Athens, Ohio

Search for more papers by this author
Philipp Potstada

Philipp Potstada

Mechanical Engineering, Institute for Materials Resource Management, University of Augsburg, Augsburg, Germany

Search for more papers by this author
Vignesh I. Perumal

Vignesh I. Perumal

Theoretical and Applied Mechanics Group, Department of Mechanical Engineering and Mechanics, College of Engineering, Drexel University, Philadelphia, Pennsylvania

Search for more papers by this author
Konstantinos P. Baxevanakis

Konstantinos P. Baxevanakis

Wolfson School of Mechanical, Electrical and Manufacturing Engineering, Loughborough University, Loughborough, UK

Search for more papers by this author
Markus G. R. Sause

Markus G. R. Sause

Mechanical Engineering, Institute for Materials Resource Management, University of Augsburg, Augsburg, Germany

Search for more papers by this author
Antonios Kontsos

Corresponding Author

Antonios Kontsos

Theoretical and Applied Mechanics Group, Department of Mechanical Engineering and Mechanics, College of Engineering, Drexel University, Philadelphia, Pennsylvania

Correspondence

Antonios Kontsos, Theoretical and Applied Mechanics Group, Department of Mechanical Engineering & Mechanics, College of Engineering, Drexel University, Philadelphia, PA.

Email: [email protected]

Search for more papers by this author
First published: 02 July 2019
Citations: 12

Abstract

Damage initiation and progression in precipitate hardened alloys are typically linked to the failure of second phase particles that result from the precipitation process. These particles have been shown to be stress concentrators and crack starters as a result of both particle debonding and fracture. In this investigation, a precipitate hardened aluminium alloy (Al 2024-T3) is loaded monotonically to investigate the role the particles have in the progressive failure process. The damage process was monitored continuously by combining the acoustic emission method either with in situ scanning electron microscopy or X-ray microcomputed tomography to obtain both surface and volume microstructural information. Particles were observed to fracture only in the elastic regime of the material response, while void growth at locations predominantly near particles were found to be associated with progressive failure in the plastic region of the macroscopic response. Experimental findings were validated by fracture simulations at the scale of particle-matrix interface.

The full text of this article hosted at iucr.org is unavailable due to technical difficulties.