In situ analysis of cracks in structural materials using synchrotron X-ray tomography and diffraction

Steuwer, A.; Edwards, L.; Pratihar, S.; Ganguly, Saibal; Peel, Matthew; Fitzpatrick, Michael E.; Marrow, James; Withers, Philip J.; Sinclair, Ian; Singh, Konjengbam Darunkumar; Gao, Nong; Buslaps, T.; Buffière, Jy

doi:10.1016/j.nimb.2005.12.063

Cited by 55 publications

(34 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Two different families of techniques have been used, namely, synchrotron X-ray diffraction and displacement field measurement either by Digital Image Correlation (DIC) or tracking of individual markers. Synchrotron X-ray diffraction studies allow mapping the crack tip strain field [4][5][6][7]. This method is mainly applied to unloaded samples and it focuses on measurement of the residual strains in the wake and at the tip of a post overload fatigue crack with a rather coarse spatial resolution along the crack front where the strain is averaged through the sample thickness for 1-mm thick samples where plane stress should prevail [7] or sampled every 300 µm to understand the stronger crack retardation observed near the specimen edges [5].…”

Section: Introductionmentioning

confidence: 99%

Influence of closure on the 3D propagation of fatigue cracks in a nodular cast iron investigated by X-ray tomography and 3D volume correlation

et al. 2010

View full text Add to dashboard Cite

Synchrotron X-ray tomography was performed during in-situ fatigue crack propagation in two small size specimens made of nodular graphite cast iron. While direct image analysis allows to retrieve the successive positions of the crack front, and to detect local crack retardation, volume correlation enables for the measurement of displacement fields in the bulk of the specimen. The Stress Intensity Factors (SIF) which are extracted from the measured displacement fields and the corresponding local crack growth rate all along the front are in good agreement with published results. In particular, it is possible to link the non propagation

show abstract

Section: Introductionmentioning

confidence: 99%

Influence of closure on the 3D propagation of fatigue cracks in a nodular cast iron investigated by X-ray tomography and 3D volume correlation

et al. 2010

View full text Add to dashboard Cite

show abstract

“…Recently, a first attempt was made at studying the relation between crack-tip strains/stresses and the local geometry of fatigue crack growth using both synchrotron X-ray diffraction and SXRT. [33] …”

Section: Damage Evolution In Materials Subjected To Static and Dynamimentioning

confidence: 99%

In‐Situ Synchrotron X‐Ray Microtomography Studies of Microstructure and Damage Evolution in Engineering Materials

Beckmann¹,

Grupp

Haibel

et al. 2007

Adv Eng Mater

View full text Add to dashboard Cite

In materials science X‐ray microtomography has evolved as an increasingly utilized technique for characterizing the 3D microstructure of materials. The fundamentals of X‐ray microtomography experimental methods and the reconstruction and data evaluation processes are briefly described. A review of in‐situ synchrotron X‐ray microtomography studies in literature is given. Examples of recent work include in‐situ microtomography investiagtions of metallic foams, in‐situ studies of the sintering of copper particles, and in‐situ investigations of creep damage evolution in composites. Future perspectives of in‐situ X‐ray microtomography studies in materials science are outlined.

show abstract

“…Third generation synchrotron X-ray facilities allow experimental measurement of the strain at the interior of the specimen. Recent works have shown that it is possible to map in 2D the strain fields around the cracktip [3][4][5]. However, our highest spatial resolution measurements (25m) were made on a very fine grained Al-Li alloy, with low fracture toughness such that the plastic zone was very small.…”

Section: Introductionmentioning

confidence: 99%

Study of overload effects in bainitic steel by synchrotron X-ray diffraction

López-Crespo¹,

Withers²,

Yates³

et al. 2013

Frattura Ed Integrità Strutturale

Self Cite

View full text Add to dashboard Cite

This work presents an in-situ characterisation of crack-tip strain fields following an overload by means of synchrotron X-ray diffraction. The study is made on very fine grained bainitic steel, thus allowing a very high resolution so that small changes occurring around the crack-tip were captured along the crack plane at the mid-thickness of the specimen. We have followed the crack as it grew through the overload location. Once the crack-tip has progressed past the overload event there is strong evidence that the crack faces contact in the region of the overload event (though not in the immediate vicinity of the current locations of the crack tip) at K min even when the crack has travelled 1mm beyond the overload location. It was also found that at K max the peak tensile strain ahead of the crack-tip decreases soon after the overload is applied and then gradually recovers as the crack grows past the compressive region created by the overload.

show abstract

In situ analysis of cracks in structural materials using synchrotron X-ray tomography and diffraction

Cited by 55 publications

References 14 publications

Influence of closure on the 3D propagation of fatigue cracks in a nodular cast iron investigated by X-ray tomography and 3D volume correlation

Influence of closure on the 3D propagation of fatigue cracks in a nodular cast iron investigated by X-ray tomography and 3D volume correlation

In‐Situ Synchrotron X‐Ray Microtomography Studies of Microstructure and Damage Evolution in Engineering Materials

Study of overload effects in bainitic steel by synchrotron X-ray diffraction

Contact Info

Product

Resources

About