An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise

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BAJT, Žiga ;LEBAN, Mirjam ;KOVAČ, Jaka ;LEGAT, Andraž .
An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise. 
Strojniški vestnik - Journal of Mechanical Engineering, [S.l.], v. 54, n.1, p. 25-36, august 2017. 
ISSN 0039-2480.
Available at: <https://www.sv-jme.eu/article/an-attempt-to-detect-various-types-of-stress-corrosion-cracking-on-austenitic-stainless-steels-by-simultaneous-measurements-of-acoustic-emission-and-electrochemical-noise/>. Date accessed: 16 jul. 2019. 
doi:http://dx.doi.org/.
Bajt, ., Leban, M., Kovač, J., & Legat, A.
(2008).
An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise.
Strojniški vestnik - Journal of Mechanical Engineering, 54(1), 25-36.
doi:http://dx.doi.org/
@article{.,
	author = {Žiga  Bajt and Mirjam  Leban and Jaka  Kovač and Andraž  Legat},
	title = {An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {54},
	number = {1},
	year = {2008},
	keywords = {detect; various types; stress-corrosion; austenitic stainless steels; simultaneous measurements; acoustic emission; electrochemical noise; },
	abstract = {his paper discusses the potential use of acoustic emission (AE) and electrochemical noise (EN) for the detection and characterization of different types of stress-corrosion cracking (SCC) in austenitic stainless steels. The discussion is based on the performance of constant load experiments. Three different measurements were performed simultaneously during the experiment: acoustic emission, electrochemical noise, and elongation of the test specimen. The stainless steel was sensitized to increase its susceptibility to SCC. Two different electrolytes and two different load levels were used to obtain different types of SCC. Intergranular stress-corrosion cracking (IGSCC) was investigated in an aqueous solution of sodium thiosulphate at a load level below the yield point, whereas transgranular stress-corrosion cracking (TGSCC) was investigated in an aqueous solution of sodium thiocyanate at a load level beyond the yield point. No simultaneous AE activity increases, EN transients or elongation discontinuities were observed in the case of IGSCC. Except for a few EN transients, the signals were smoother than in the case of TGSCC, which could reflect the more continuous nature of IGSCC processes. This is also probably the reason that no simultaneous events were observed in this case. On the other hand, a significant increase in the DC part of the measured electrochemical current, corresponding in time with increases in elongation and, to some extent, also increases in AE activity, was observed in the second part of experiment. It was assumed that the current shift in the anodic direction was caused by an increase in the dissolving surface area due to the growth of cracks. On the other hand, on the basis of the simultaneous use of the three techniques, several single TGSCC events were detected. Detection was accomplished by the observation of simultaneous increases in AE activity, EN transients, and discontinuities (jumps) in elongation. On the basis of the time resolution of the measurements, it was concluded that the detected electrochemical events were the result of corresponding mechanical events. It was also concluded that the simultaneous use of EN and AE is a promising approach for the detection and characterization of SCC, but that further research and improvements of the measuring system are needed.},
	issn = {0039-2480},	pages = {25-36},	doi = {},
	url = {https://www.sv-jme.eu/article/an-attempt-to-detect-various-types-of-stress-corrosion-cracking-on-austenitic-stainless-steels-by-simultaneous-measurements-of-acoustic-emission-and-electrochemical-noise/}
}
Bajt, .,Leban, M.,Kovač, J.,Legat, A.
2008 August 54. An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise. Strojniški vestnik - Journal of Mechanical Engineering. [Online] 54:1
%A Bajt, Žiga 
%A Leban, Mirjam 
%A Kovač, Jaka 
%A Legat, Andraž 
%D 2008
%T An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise
%B 2008
%9 detect; various types; stress-corrosion; austenitic stainless steels; simultaneous measurements; acoustic emission; electrochemical noise; 
%! An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise
%K detect; various types; stress-corrosion; austenitic stainless steels; simultaneous measurements; acoustic emission; electrochemical noise; 
%X his paper discusses the potential use of acoustic emission (AE) and electrochemical noise (EN) for the detection and characterization of different types of stress-corrosion cracking (SCC) in austenitic stainless steels. The discussion is based on the performance of constant load experiments. Three different measurements were performed simultaneously during the experiment: acoustic emission, electrochemical noise, and elongation of the test specimen. The stainless steel was sensitized to increase its susceptibility to SCC. Two different electrolytes and two different load levels were used to obtain different types of SCC. Intergranular stress-corrosion cracking (IGSCC) was investigated in an aqueous solution of sodium thiosulphate at a load level below the yield point, whereas transgranular stress-corrosion cracking (TGSCC) was investigated in an aqueous solution of sodium thiocyanate at a load level beyond the yield point. No simultaneous AE activity increases, EN transients or elongation discontinuities were observed in the case of IGSCC. Except for a few EN transients, the signals were smoother than in the case of TGSCC, which could reflect the more continuous nature of IGSCC processes. This is also probably the reason that no simultaneous events were observed in this case. On the other hand, a significant increase in the DC part of the measured electrochemical current, corresponding in time with increases in elongation and, to some extent, also increases in AE activity, was observed in the second part of experiment. It was assumed that the current shift in the anodic direction was caused by an increase in the dissolving surface area due to the growth of cracks. On the other hand, on the basis of the simultaneous use of the three techniques, several single TGSCC events were detected. Detection was accomplished by the observation of simultaneous increases in AE activity, EN transients, and discontinuities (jumps) in elongation. On the basis of the time resolution of the measurements, it was concluded that the detected electrochemical events were the result of corresponding mechanical events. It was also concluded that the simultaneous use of EN and AE is a promising approach for the detection and characterization of SCC, but that further research and improvements of the measuring system are needed.
%U https://www.sv-jme.eu/article/an-attempt-to-detect-various-types-of-stress-corrosion-cracking-on-austenitic-stainless-steels-by-simultaneous-measurements-of-acoustic-emission-and-electrochemical-noise/
%0 Journal Article
%R 
%& 25
%P 12
%J Strojniški vestnik - Journal of Mechanical Engineering
%V 54
%N 1
%@ 0039-2480
%8 2017-08-18
%7 2017-08-18
Bajt, Žiga, Mirjam  Leban, Jaka  Kovač, & Andraž  Legat.
"An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise." Strojniški vestnik - Journal of Mechanical Engineering [Online], 54.1 (2008): 25-36. Web.  16 Jul. 2019
TY  - JOUR
AU  - Bajt, Žiga 
AU  - Leban, Mirjam 
AU  - Kovač, Jaka 
AU  - Legat, Andraž 
PY  - 2008
TI  - An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise
JF  - Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - detect; various types; stress-corrosion; austenitic stainless steels; simultaneous measurements; acoustic emission; electrochemical noise; 
N2  - his paper discusses the potential use of acoustic emission (AE) and electrochemical noise (EN) for the detection and characterization of different types of stress-corrosion cracking (SCC) in austenitic stainless steels. The discussion is based on the performance of constant load experiments. Three different measurements were performed simultaneously during the experiment: acoustic emission, electrochemical noise, and elongation of the test specimen. The stainless steel was sensitized to increase its susceptibility to SCC. Two different electrolytes and two different load levels were used to obtain different types of SCC. Intergranular stress-corrosion cracking (IGSCC) was investigated in an aqueous solution of sodium thiosulphate at a load level below the yield point, whereas transgranular stress-corrosion cracking (TGSCC) was investigated in an aqueous solution of sodium thiocyanate at a load level beyond the yield point. No simultaneous AE activity increases, EN transients or elongation discontinuities were observed in the case of IGSCC. Except for a few EN transients, the signals were smoother than in the case of TGSCC, which could reflect the more continuous nature of IGSCC processes. This is also probably the reason that no simultaneous events were observed in this case. On the other hand, a significant increase in the DC part of the measured electrochemical current, corresponding in time with increases in elongation and, to some extent, also increases in AE activity, was observed in the second part of experiment. It was assumed that the current shift in the anodic direction was caused by an increase in the dissolving surface area due to the growth of cracks. On the other hand, on the basis of the simultaneous use of the three techniques, several single TGSCC events were detected. Detection was accomplished by the observation of simultaneous increases in AE activity, EN transients, and discontinuities (jumps) in elongation. On the basis of the time resolution of the measurements, it was concluded that the detected electrochemical events were the result of corresponding mechanical events. It was also concluded that the simultaneous use of EN and AE is a promising approach for the detection and characterization of SCC, but that further research and improvements of the measuring system are needed.
UR  - https://www.sv-jme.eu/article/an-attempt-to-detect-various-types-of-stress-corrosion-cracking-on-austenitic-stainless-steels-by-simultaneous-measurements-of-acoustic-emission-and-electrochemical-noise/
@article{{}{.},
	author = {Bajt, ., Leban, M., Kovač, J., Legat, A.},
	title = {An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise},
	journal = {Strojniški vestnik - Journal of Mechanical Engineering},
	volume = {54},
	number = {1},
	year = {2008},
	doi = {},
	url = {https://www.sv-jme.eu/article/an-attempt-to-detect-various-types-of-stress-corrosion-cracking-on-austenitic-stainless-steels-by-simultaneous-measurements-of-acoustic-emission-and-electrochemical-noise/}
}
TY  - JOUR
AU  - Bajt, Žiga 
AU  - Leban, Mirjam 
AU  - Kovač, Jaka 
AU  - Legat, Andraž 
PY  - 2017/08/18
TI  - An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise
JF  - Strojniški vestnik - Journal of Mechanical Engineering; Vol 54, No 1 (2008): Strojniški vestnik - Journal of Mechanical Engineering
DO  - 
KW  - detect, various types, stress-corrosion, austenitic stainless steels, simultaneous measurements, acoustic emission, electrochemical noise, 
N2  - his paper discusses the potential use of acoustic emission (AE) and electrochemical noise (EN) for the detection and characterization of different types of stress-corrosion cracking (SCC) in austenitic stainless steels. The discussion is based on the performance of constant load experiments. Three different measurements were performed simultaneously during the experiment: acoustic emission, electrochemical noise, and elongation of the test specimen. The stainless steel was sensitized to increase its susceptibility to SCC. Two different electrolytes and two different load levels were used to obtain different types of SCC. Intergranular stress-corrosion cracking (IGSCC) was investigated in an aqueous solution of sodium thiosulphate at a load level below the yield point, whereas transgranular stress-corrosion cracking (TGSCC) was investigated in an aqueous solution of sodium thiocyanate at a load level beyond the yield point. No simultaneous AE activity increases, EN transients or elongation discontinuities were observed in the case of IGSCC. Except for a few EN transients, the signals were smoother than in the case of TGSCC, which could reflect the more continuous nature of IGSCC processes. This is also probably the reason that no simultaneous events were observed in this case. On the other hand, a significant increase in the DC part of the measured electrochemical current, corresponding in time with increases in elongation and, to some extent, also increases in AE activity, was observed in the second part of experiment. It was assumed that the current shift in the anodic direction was caused by an increase in the dissolving surface area due to the growth of cracks. On the other hand, on the basis of the simultaneous use of the three techniques, several single TGSCC events were detected. Detection was accomplished by the observation of simultaneous increases in AE activity, EN transients, and discontinuities (jumps) in elongation. On the basis of the time resolution of the measurements, it was concluded that the detected electrochemical events were the result of corresponding mechanical events. It was also concluded that the simultaneous use of EN and AE is a promising approach for the detection and characterization of SCC, but that further research and improvements of the measuring system are needed.
UR  - https://www.sv-jme.eu/article/an-attempt-to-detect-various-types-of-stress-corrosion-cracking-on-austenitic-stainless-steels-by-simultaneous-measurements-of-acoustic-emission-and-electrochemical-noise/
Bajt, Žiga, Leban, Mirjam, Kovač, Jaka, AND Legat, Andraž.
"An Attempt to Detect Various Types of Stress-Corrosion Cracking on Austenitic Stainless Steels by Simultaneous Measurements of Acoustic Emission and Electrochemical Noise" Strojniški vestnik - Journal of Mechanical Engineering [Online], Volume 54 Number 1 (18 August 2017)

Authors

Affiliations

  • Slovenian National Building and Civil Engineering Institute, Slovenia
  • Slovenian National Building and Civil Engineering Institute, Slovenia
  • Slovenian National Building and Civil Engineering Institute, Slovenia
  • Slovenian National Building and Civil Engineering Institute, Slovenia

Paper's information

Strojniški vestnik - Journal of Mechanical Engineering 54(2008)1, 25-36

his paper discusses the potential use of acoustic emission (AE) and electrochemical noise (EN) for the detection and characterization of different types of stress-corrosion cracking (SCC) in austenitic stainless steels. The discussion is based on the performance of constant load experiments. Three different measurements were performed simultaneously during the experiment: acoustic emission, electrochemical noise, and elongation of the test specimen. The stainless steel was sensitized to increase its susceptibility to SCC. Two different electrolytes and two different load levels were used to obtain different types of SCC. Intergranular stress-corrosion cracking (IGSCC) was investigated in an aqueous solution of sodium thiosulphate at a load level below the yield point, whereas transgranular stress-corrosion cracking (TGSCC) was investigated in an aqueous solution of sodium thiocyanate at a load level beyond the yield point. No simultaneous AE activity increases, EN transients or elongation discontinuities were observed in the case of IGSCC. Except for a few EN transients, the signals were smoother than in the case of TGSCC, which could reflect the more continuous nature of IGSCC processes. This is also probably the reason that no simultaneous events were observed in this case. On the other hand, a significant increase in the DC part of the measured electrochemical current, corresponding in time with increases in elongation and, to some extent, also increases in AE activity, was observed in the second part of experiment. It was assumed that the current shift in the anodic direction was caused by an increase in the dissolving surface area due to the growth of cracks. On the other hand, on the basis of the simultaneous use of the three techniques, several single TGSCC events were detected. Detection was accomplished by the observation of simultaneous increases in AE activity, EN transients, and discontinuities (jumps) in elongation. On the basis of the time resolution of the measurements, it was concluded that the detected electrochemical events were the result of corresponding mechanical events. It was also concluded that the simultaneous use of EN and AE is a promising approach for the detection and characterization of SCC, but that further research and improvements of the measuring system are needed.

detect; various types; stress-corrosion; austenitic stainless steels; simultaneous measurements; acoustic emission; electrochemical noise;