Assessment of the micro-mechanical fracture processes within dissimilar metal welds

Brayshaw, W. J.; Cooper, Adam J.; Sherry, Andrew H.

doi:10.1016/j.engfailanal.2019.01.048

Cited by 11 publications

(3 citation statements)

References 22 publications

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“…The material determines the diversity in the crack growth mechanics where the fracture tip is located. A micro-shear mechanism was responsible for the first crack growth [23]. The investigation's quantitative electron microscopy fractographic examination reveals that all implants acquired fatigue cracks of similar lengths before suffering catastrophic fractures [24].…”

Section: Introductionmentioning

confidence: 90%

Simulation and experimentation crack analysis of annealed TC4 ELI alloy in the room and body fluid environment

Jha

Ajit

2023

Preprint

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A B S T R A C T Simulation and experimentation crack analysis of annealed TC4 ELI alloy in room and body fluid environments are studied in this research work. The crack morphology of the compact-tension specimen is thoroughly investigated. The critical crack size based on the authenticated fracture toughness is preconceived. The crack initiation and growth are performed and analysed at 5 Hz and 10.55 kN fatigue load. The failure mechanisms and microstructural morphology are explored to inspect the fractured surface. The dipped component’s (Body fluid environment) fracture toughness and life are 3.6% and 35%, respectively, less than the undipped sample. The experimental life of the undipped specimen is observed as 26.252 million cycles, whereas for dipped, it is marked as 16.99 million cycles which shows significant degradation of component life.

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Section: Introductionmentioning

confidence: 90%

Simulation and experimentation crack analysis of annealed TC4 ELI alloy in the room and body fluid environment

Jha

Ajit

2023

Preprint

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“…However, in the case of cracks starting from the inside, it is impossible to check with the naked eye, so techniques such as non-destructive testing must be used. For structures where the crack occurs, the strain energy is greater than that of the non-crack-producing structures, which in turn makes the critical load intolerable [2]. Cracks also cause serious structural problems, including corrosion [3,4].…”

Section: Introductionmentioning

confidence: 99%

Crack Detecting Method Based on Grid-Type Sensing Networks Using Electrical Signals

Ahn

Lee

Jeong

et al. 2023

Sensors

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Cracks have a primary effect on the failure of a structure. Therefore, the development of crack sensors with high accuracy and resolution and cracks detection method are important. In this study, the crack sensors were fabricated, and the crack locations were detected with the electrical signal of the crack sensor. First, a metal grid-type micro-crack sensor based on silver was fabricated. The sensor is made with electrohydrodynamics (EHD) inkjet printing technology, which is well known as the next generation of printed electronics technology. Optimal printing conditions were established through experiments, and a grid sensor was obtained. After that, single cracks and multiple cracks were simulated on the sensor, and electrical signals generated from the sensor were measured. The measured electrical signal tracked the location of the cracks in three steps: simple cross-calculation, interpolation, and modified P-SPICE. It was confirmed that cracks could be effectively found and displayed using the method presented in this paper.

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“…For instance, fatigue fracture of metals and propagation of fatigue cracks depend on stress levels and rates, surface roughness, heterogeneity of microstructure, etc. To an extent, all of these factors are relevant for the growth of fatigue cracks [ 1 , 2 , 3 , 4 , 5 , 6 ].…”

Section: Introductionmentioning

confidence: 99%

Fatigue-Induced Evolution of AISI 310S Steel Microstructure after Electron Beam Treatment

et al. 2020

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Research was carried out to explore the effect of pulsed electron beam irradiation on the behavior of structure and phase state in AISI 310S steel exposed to high-cycle fatigue. A 2.2 times increase in the fatigue life of samples irradiated by electron beams was revealed. The outcomes of scanning and transmission electron microscopic studies suggest the most probable reason for the fracture of steel samples irradiated by a high-intensity electron beam to be microcraters originating on a treated surface and acting as stress risers initiating the propagation of microcracks. The irradiation with a pulsed electron beam causes extremely fast melting of the surface. As a result of the subsequent rapid crystallization, a polycrystalline structure nearly twice as small as an average grain in the untreated steel is formed. Since a surface layer crystallizes rapidly, crystallization cells ranging from 120 to 170 nm develop in the volume of grains. The fatigue testing is shown to be associated with a martensite transformation γ ⇒ ε in the surface layer. One option to intensify a fatigue life increase of the steel in focus is supposed to be the neutralization of crater-forming on a surface treated by electron beams.

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Assessment of the micro-mechanical fracture processes within dissimilar metal welds

Cited by 11 publications

References 22 publications

Simulation and experimentation crack analysis of annealed TC4 ELI alloy in the room and body fluid environment

Simulation and experimentation crack analysis of annealed TC4 ELI alloy in the room and body fluid environment

Crack Detecting Method Based on Grid-Type Sensing Networks Using Electrical Signals

Fatigue-Induced Evolution of AISI 310S Steel Microstructure after Electron Beam Treatment

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