In-situ scanning electron microscopy studies of small fatigue crack growth in ultrasonic consolidation bonded aluminum 2024 laminated structure

He, Xiao-Hua; Shi, Hui‐Ji; Zhang, Yuduo; Fu, Wenxiang; Yang, Zhigang; Wilkinson, C. E.

doi:10.1016/j.matlet.2013.08.093

Cited by 14 publications

(17 citation statements)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…For DIC measurements in fatigue investigations, images can be also obtained using electron microscopy for microscale observations . In this context, DIC has been shown to be useful at several scales to measure strain as a function of applied loading.…”

Section: Optical Nde Methods In Materials Fatiguementioning

confidence: 99%

“…In this context, DIC has been shown to be useful at several scales to measure strain as a function of applied loading. The majority of related investigations focused on crack initiation and growth . The use of these optical NDE methods at the microscale and nanoscale leverages imaging provided by scanning and transmission electron microscopes (SEM and TEM) which is achieved by the application of surface patterns that have sufficient electrical contrast to be used by the DIC method .…”

Section: Optical Nde Methods In Materials Fatiguementioning

confidence: 99%

“…AE is a passive NDE method that detects stress waves released during an irreversible process such as failure and detects changes due to evolving damage (ie, crack growth). In contrast, UT is an active NDE method in which waves are user‐generated and interrogate the material, as for example, to detect the existence of damage (ie, crack size). The procedure for applying both techniques in the context of laboratory‐scale materials testing relies on the placement of appropriate sensors in a number of locations to ensure that signals resulting from damage will be detectable .…”

Section: Acoustic Nde Methods Used In Materials Fatiguementioning

confidence: 99%

See 2 more Smart Citations

The use of nondestructive evaluation methods in fatigue: A review

Wisner

Mazur

Kontsos

2020

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Efforts to understand fatigue in materials generally rely on defining relationships between the material response to fatigue loading and the evolving remaining material life portion. Typical measurements and data associated with such relationships include load (stress), displacement (strain), and associated properties (eg, mean stress and strain, energy dissipation, and residual stiffness). In addition to obtaining such measurements, efforts have been made to leverage nondestructive evaluation (NDE) methods to obtain additional information and enhance the description of the material fatigue response, especially its evolution due to interacting material‐microstructure‐property relationships. Given the range of available NDE methods and the number of materials they can be applied to, a critical overview of related investigations is presented in this article. Specifically, the state of the art of applying optical, thermal, acoustic, electromagnetic, X‐ray, and other diffraction NDE methods in fatigue investigations is provided and discussed. The methods are individually described for background and defining their relationship to fatigue, followed by descriptions of their current uses and contributions to enhancing the understanding of fatigue, and their limitations and ways that improvements could be made.

show abstract

Section: Optical Nde Methods In Materials Fatiguementioning

confidence: 99%

Section: Optical Nde Methods In Materials Fatiguementioning

confidence: 99%

Section: Acoustic Nde Methods Used In Materials Fatiguementioning

confidence: 99%

See 1 more Smart Citation

The use of nondestructive evaluation methods in fatigue: A review

Wisner

Mazur

Kontsos

2020

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

show abstract

“…[1][2][3][4][5] Additionally, a significant amount of research into the mechanical behaviour characterization, damage evolution, and in particular crack growth in these alloys subjected to both monotonic, 6-10 bending, 11 and fatigue loading conditions [12][13][14][15][16][17][18][19][20][21][22][23] has contributed towards the safe use of such alloys in engineering applications. [1][2][3][4][5] Additionally, a significant amount of research into the mechanical behaviour characterization, damage evolution, and in particular crack growth in these alloys subjected to both monotonic, 6-10 bending, 11 and fatigue loading conditions [12][13][14][15][16][17][18][19][20][21][22][23] has contributed towards the safe use of such alloys in engineering applications.…”

Section: Introductionmentioning

confidence: 99%

“…Specifically, the effect of crystallography on small fatigue crack growth was investigated in nickel single crystals showing crack formation along slip planes. 13 In situ observations have been also used to identify fatigue crack initiation in Al 7075-T651 where fatigue cracks were seen to grow from fractured particles in the aluminium. 27 Furthermore, the effect of precipitates and interfaces were examined in aluminium 2024 laminated structures using in situ bending tests.…”

Section: Introductionmentioning

confidence: 99%

In situ monitoring of particle fracture in aluminium alloys

Wisner

Kontsos

2017

Fatigue Fract Eng Mat Struct

View full text Add to dashboard Cite

Material damage at the microscale involves both initiation and interaction effects that are typically activated long before the appearance of macroscopically observable failure events. These early appearances of damage have been broadly classified as microstructure‐sensitive damage precursors or indicators. A particular class of such precursors which is of importance to aluminium and other precipitate‐hardened alloys is the focus of this article. Specifically, the hard, intermetallic particles in aluminium alloys fracture before significant failure occur in the surrounding matrix. In this investigation, an effort to directly assess particle fracture activity at the time and scale that it occurs is made by coupling mechanical testing inside a scanning electron microscope with nondestructive evaluation techniques including digital image correlation as well as real‐time acoustic emission monitoring. The use of a surface measurement technique along with a volumetric monitoring method at the microscope scale provides a way for coupling of fracture information at locations which are directly related to the particle activity. In this article, Al2024‐T3 specimens in the as‐received condition were subjected to tension as well as to tension‐tension cyclic loading. The obtained in situ results demonstrate, for the first time to the best knowledge of the authors, that particle fracture occurs early in the damage process which justifies its characterization as a material damage precursor. The overall approach provides datasets capable to detect particle fracture initiation, which could become useful in future structural health monitoring applications.

show abstract