Detection and characterization of stress-corrosion cracking on 304 stainless steel by electrochemical noise and acoustic emission techniques

Du, Gang; Li, J.; Wang, W.K.; Jiang, Chenchen; Shi, Song

doi:10.1016/j.corsci.2011.05.030

Cited by 103 publications

(52 citation statements)

References 45 publications

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“…Moreover, the average b-value was 1.455, which was close to those of deformation of corroded specimens [46], dislocations [48], and cracking [48,49]. As mentioned, various AE sources in electrochemical corrosion have been proposed by several researchers such as rupture of passive film [9], hydrogen bubble evolution inside the pits [11][12][13][14], crevice propagation [15], cracking [17,18,20]. However, no pitting was found and hydrogen bubbles were hard to form in high temperature aqueous environment [20].…”

Section: Mechanism Of Ae Sourcesupporting

confidence: 58%

Acoustic emission behavior of 316LN stainless steel during oxide film formation in high temperature aqueous environment

Chai

Duan

Wang

et al. 2016

Materials & Corrosion

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Acoustic emission (AE) technique was used to study the oxide film formation of 316LN stainless steel (SS) in high temperature aqueous environment. The morphology and chemical compositions of oxide films of 316LN SS base metal and weld were also investigated by using scanning electron microscopy (SEM), energy dispersive X-ray spectroscopy (EDX), and X-ray photoelectron spectroscopy (XPS). The results indicated that 316LN SS weld had a higher oxidation resistance than that of base metal due to higher amount of chromium and nickel in the weld material. AE activity and intensity were high during the oxide film formation and decreased gradually with increasing immersion time. The evolution of AE hits was consistent with the oxidation kinetics of 316LN SS base metal and weld. The formation of Cr-enrichment layer and Ni(OH) 2 contributed to the enhancement of oxidation resistance, leading to a continuous decrease of AE activity and intensity. Two types of AE waveforms were detected and the frequency spectra of both types mainly ranged from 0.3 to 0.6 MHz. According to the analyses of AE based b-values and parameters, it could be deduced that AE sources during oxide film formation were the plastic deformation of base metal/weld and oxide film.

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Section: Mechanism Of Ae Sourcesupporting

confidence: 58%

Acoustic emission behavior of 316LN stainless steel during oxide film formation in high temperature aqueous environment

Chai

Duan

Wang

et al. 2016

Materials & Corrosion

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“…[1][2][3] They are, however, susceptible to corrosion, which is the cause of a signicant number of failure events in the nuclear sector.…”

Section: Introductionmentioning

confidence: 99%

A study of dynamic nanoscale corrosion initiation events using HS-AFM

et al. 2018

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Atomic force microscopes (AFMs) are capable of high-resolution mapping of structures and the measurement of mechanical properties on nanometre scales within gaseous, liquid and vacuum environments. The contact mode high-speed AFM (HS-AFM) developed at Bristol Nano Dynamics Ltd. operates at speeds that are orders of magnitude faster than conventional AFMs, and is capable of capturing multiple frames per second. This allows for direct observation of dynamic events in real-time, with nanometre lateral resolution and subatomic height resolution. HS-AFM is a valuable tool for the imaging of nanoscale corrosion initiation events, such as metastable pitting, grain boundary (GB) dissolution and short crack formation during stress corrosion cracking (SCC). Within this study HS-AFM was combined with SEM and FIB milling to produce a multifaceted picture of localised corrosion events occurring on thermally sensitised AISI 304 stainless steel in an aqueous solution of 1% sodium chloride (NaCl).HS-AFM measurements were performed in situ by imaging within a custom built liquid cell with parallel electrochemical control. The high resolution of the HS-AFM allowed for measurements to be performed at individual reaction sites, i.e. at specific GB carbide surfaces. Topographic maps of the sample surface allowed for accurate measurements of the dimensions of pits formed. Using these measurements it was possible to calculate, and subsequently model, the volumes of metal reacting with respect to time, and so the current densities and ionic fluxes at work. In this manner, the local electrochemistry at nanoscale reaction sites may be reconstructed.

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“…For this, among other reasons, non-destructive techniques have been widely used nowadays in composite materials characterization such as acoustic emission. Acoustic Emission (AE) analysis is an extremely powerful technology that can be deployed within a wide range of application of non-destructive testing: metal pressure vessels, piping systems, reactors and similar [1]- [4]. However lately, AE technique has been used extensively in materials characterization, especially on composite materials research by investigating properties of materials, breakdown mechanisms and damage behavior [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

Acoustic Emission Technique Applied in Textiles Mechanical Characterization

et al. 2017

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Abstract. The common textile architecture/geometry are woven, braided, knitted, stitch boded, and Z-pinned. Fibres in textile form exhibit good out-of-plane properties and good fatigue and impact resistance, additionally, they have better dimensional stability and conformability. Besides the nature of the textile, the architecture has a great role in the mechanical behaviour and mechanisms of damage in textiles, therefore damage mechanisms and mechanical performance in structural applications textiles have been a major concern. Mechanical damage occurs to a large extent during the service lifetime consequently it is vital to understand the material mechanical behaviour by identifying its mechanisms of failure such as onset of damage, crack generation and propagation. In this work, textiles of different architecture were used to manufacture epoxy based composites in order to study failure events under tensile load by using acoustic emission technique which is a powerful characterization tool due to its link between AE data and fracture mechanics, which makes this relation a very useful from the engineering point of view.

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Detection and characterization of stress-corrosion cracking on 304 stainless steel by electrochemical noise and acoustic emission techniques

Cited by 103 publications

References 45 publications

Acoustic emission behavior of 316LN stainless steel during oxide film formation in high temperature aqueous environment

Acoustic emission behavior of 316LN stainless steel during oxide film formation in high temperature aqueous environment

A study of dynamic nanoscale corrosion initiation events using HS-AFM

Acoustic Emission Technique Applied in Textiles Mechanical Characterization

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