2021
DOI: 10.3390/ma14195885
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Estimation of the Plastic Zone in Fatigue via Micro-Indentation

Abstract: Accurate knowledge of the plastic zone of fatigue cracks is a very direct and effective way to quantify the damage of components subjected to cyclic loads. In this work, we propose an ultra-fine experimental characterisation of the plastic zone based on Vickers micro-indentations. The methodology is applied to different compact tension (CT) specimens made of aluminium alloy 2024-T351 subjected to increasing stress intensity factors. The experimental work and sensitivity analysis showed that polishing the surfa… Show more

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Cited by 7 publications
(9 citation statements)
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“…The results show that the hardness distribution from the CPZ to the monotonic plastic zone decreased rapidly to smooth. The overall hardness distribution trend was consistent with the reference [ 20 ]. The boundary of the CPZ was determined according to the hardness results, which were compared with the measurement results of the proposed method in this paper.…”
Section: Resultssupporting
confidence: 90%
See 2 more Smart Citations
“…The results show that the hardness distribution from the CPZ to the monotonic plastic zone decreased rapidly to smooth. The overall hardness distribution trend was consistent with the reference [ 20 ]. The boundary of the CPZ was determined according to the hardness results, which were compared with the measurement results of the proposed method in this paper.…”
Section: Resultssupporting
confidence: 90%
“…In order to prove that the measured results are consistent with the reality, the difference of surface hardness between the CPZ and monotone plastic zone can be known from reference [ 20 ], and the boundary of the CPZ can be determined by looking for the abrupt position of hardness.…”
Section: Resultsmentioning
confidence: 99%
See 1 more Smart Citation
“…Synchrotron X‐ray diffraction data have been used to quantify the overload effect during fatigue crack growth, 36 to identify the zone of influence of an overload cycle 34 as well as to evaluate the stress intensity factor and characterise the crack tip fields in the bulk of materials 34,42 . More recently, the size and shape of the plastic zone in fatigue have been characterised for a 2024 aluminum alloy using a simpler methodology based on microindentation 43 …”
Section: Introductionmentioning
confidence: 99%
“…34,42 More recently, the size and shape of the plastic zone in fatigue have been characterised for a 2024 aluminum alloy using a simpler methodology based on microindentation. 43 In summary, there exists a number of experimental techniques for characterising the plasticity at the tip of a fatigue crack. Nevertheless, these are mostly surface techniques and cannot infer information of the plastic behaviour in the bulk of the material.…”
Section: Introductionmentioning
confidence: 99%