Relationship of acoustic emission to the kinetics and micromechanism of fatigue failure of high-strength steel with a martensitic structure

Romaniv, O. N.; Kirillov, K. I.; Zima, Yu. V.; Nikiforchin, G. N.

doi:10.1007/bf00718136

Cited by 4 publications

(7 citation statements)

References 5 publications

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“…The rise time and amplitude usually reflect the nature of AE source mechanisms. The higher distributions of rise time and amplitude of 200 1C tempered specimens than other specimens confirmed the point that the main AE source for 200 1C tempered martenstie specimen was the cleavage fracture events rather than plastic events during fatigue process, because the cleavage fracture would generate more AE signals with higher amplitude than plastic activities [29]. On the other hand, the similar lower ranges of rise time and amplitude in Stage 2 for 600 1C tempered, base metal, and weld specimens were consistent with their similar fracture surfaces with fatigue striations characteristics.…”

Section: Ae Source Mechanismssupporting

confidence: 72%

“…Previous study demonstrated that the intergranular cleavage was the AE source in high strength steel with the martensitic microstructure during fatigue [29]. In the present study, we believe that the cleavage fracture of martensite laths during fatigue crack propagation is also the main AE source for 200 1C tempered specimens throughout the fatigue process.…”

Section: Ae Source Mechanismsmentioning

confidence: 74%

“…8a suggesting that these cleavage fractures corresponded to the failure of martensite laths. It indicated that the cleavage fatigue crack propagation was the major fracture mode in 200 1C tempered specimen throughout the fatigue process, which is common for tempered martensitic steels [29]. It also led to a higher Paris exponent m in 2001C tempered specimen, as shown in Fig.…”

Section: Ae Source Mechanismsmentioning

confidence: 92%

“…The highest AE counts and counts rate of 200 1C tempered specimen were mainly attributed to their brittle fracture mode and AE source mechanism. The cleavage fracture of the martensite laths emitted more intense AE signals, because the brittle cleavage fracture is a more energy dissipated process compared to ductile fracture, a significant portion of the accumulated elastic energy was dissipated as the result of formation of a quite large plastic zone during ductile fracture [29].…”

Section: Effects Of Micro-structure On Ae Counts and Counts Ratementioning

confidence: 99%

See 3 more Smart Citations

Effects of micro-structure on fatigue crack propagation and acoustic emission behaviors in a micro-alloyed steel

Han

Luo

Zhang

et al. 2013

Materials Science and Engineering: A

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Section: Ae Source Mechanismssupporting

confidence: 72%

Section: Ae Source Mechanismsmentioning

confidence: 74%

Section: Ae Source Mechanismsmentioning

confidence: 92%

Section: Effects Of Micro-structure On Ae Counts and Counts Ratementioning

confidence: 99%

See 2 more Smart Citations

Effects of micro-structure on fatigue crack propagation and acoustic emission behaviors in a micro-alloyed steel

Han

Luo

Zhang

et al. 2013

Materials Science and Engineering: A

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“…AE testing is a useful nondestructive technique for real-time examination of the behaviour of materials deforming under stress [1]. The main goal of the monitoring of AE phenomena is to provide a series of useful information by the correlation of AE signals with growing fracture process [2]. The wide range for application of acoustic emission is between seismic event as the largest scale and the movement of small numbers of dislocation in material as the small scale [3].…”

Section: Introductionmentioning

confidence: 99%

Fracture Formation Evaluation of Reinforced Concrete Structure Using Acoustic Emission Technique

Panjsetooni

Bunnori

Vakili

et al. 2013

Chinese Journal of Engineering

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Acoustic emission (AE) is an important nondestructive evaluation (NDE) technique used in the field of structural engineering for both case local and global monitoring. In this study AE technique with a new approach was employed to investigate the process of fracture formation in reinforced concrete structure. A number of reinforced concrete (RC) one story frames were tested under loading cycle and were simultaneously monitored using AE. The AE test data was analyzed using the relaxation ratio and calm and load ratio method. Also, the relaxation ratio was dominated with approaching load to 58% of the ultimate load. In addition three levels of damage using calm and load ratio were distinguished. The trend of relaxation ratio and calm and load ratio method during loading and unloading showed that these methods are strongly sensitive with cracks growth in RC frame specimens and were able to indicate the levels of damage. Also, results showed that AE can be considered as a viable method to predict the remaining service life of reinforced concrete. In addition, with respect to the results obtained from relaxation ratio and, load and calm ratio indicated, a new chart is proposed.

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Optimisation of acoustic emission wavestreaming for structural health monitoring

McCrory

Pearson

Pullin

et al. 2020

Structural Health Monitoring

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Structural health monitoring has gained wide appeal for applications with high inspection costs, such as aircraft and wind turbines. As the structures and materials used in these industries evolve, so too must the technologies used to monitor them. Acoustic emission is a passive method of detecting damage which lends itself well to structural health monitoring. One form of acoustic emission monitoring, known as wavestreaming, involves intermittently recording data for set periods of time and using the sequential recordings to detect changes in the state of the structure. However, at present, there is no standard method for selecting appropriate wavestream recording parameters, such as their length or their interval of collection. This article investigates a method of optimising acoustic emission wavestreaming for structural health monitoring purposes by introducing the novel concept of adjoining consecutive discrete acoustic emission hit signals to create synthetic wavestreams. To this end, a pre-notched 492 mm × 67.5 mm × 20 mm, 300M grade steel cantilever specimen was subject to cyclic loading and both acoustic emission hit data and conventional wavestreams were collected as a crack grew in the notched region; crack growth activity was also monitored using digital image correlation for comparison. To demonstrate the proposed optimisation process, four sets of synthetic wavestreams were created from the hit data, 0.25, 0.5, 1.0 and 1.5 s in length, and compared with the 1.5-s-long conventional wavestreams. The activity of the peak frequency and frequency centroid bands of interest within the conventional and synthetic wavestreams were examined to determine whether or not cracking activity could be inferred through them. Across comparisons of all data, it was found that the 0.5-s-long synthetic wavestreams contained enough information to identify the same trends as the conventional wavestreams for this application; thus, the use of synthetic wavestreams as a tool for selecting an appropriate wavestream recording length was demonstrated.

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Relationship of acoustic emission to the kinetics and micromechanism of fatigue failure of high-strength steel with a martensitic structure

Cited by 4 publications

References 5 publications

Effects of micro-structure on fatigue crack propagation and acoustic emission behaviors in a micro-alloyed steel

Effects of micro-structure on fatigue crack propagation and acoustic emission behaviors in a micro-alloyed steel

Fracture Formation Evaluation of Reinforced Concrete Structure Using Acoustic Emission Technique

Optimisation of acoustic emission wavestreaming for structural health monitoring

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