Correlation Between Thermal Desorption Spectrum Features and Creep Damage

Abstract The analysis of the spectrum features of thermal desorption spectroscopy (TDS) using the desorption-rate profile against temperature is widely applied to investigate the hydrogen kinetics including diffusion and trapping in metallic materials, which is related to hydrogen embrittlement. Recently the TDS spectrum features such as the peak magnitude and the peak area have been used for qualitative assessment of creep damage, although there is still a lack of theoretical understanding on the correlation between TDS spectrum features and creep damage. In this paper, creep voids inducing creep damage are considered as the only kind of hydrogen traps in steels. The relationships between the TDS spectrum features and creep damage of ferritic steels are investigated through parameter analysis of the modified McNabb-Foster model together with the Oriani assumption, which can describe hydrogen evolution during thermal desorption. It is found that the peak area of TDS spectrum is independent of the trap binding energy, and it is proportional to the trap density, demonstrating that it could be a good indicator for creep damage. The creep damage can be characterized as a power-law function of the peak area of TDS spectrum, indicating TDS as a promising semi-destructive characterization method for creep damage of metallic steels.

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Correlation Between Thermal Desorption Spectrum Features and Creep Damage

10.1115/1.0000119v ◽

2021 ◽

Author(s):

Yu Zhou ◽

Zhichao Fan ◽

Xuedong Chen ◽

Huifeng Jiang ◽

Hedieh Jazaeri ◽

...

Keyword(s):

Thermal Desorption ◽

Creep Damage ◽

Thermal Desorption Spectrum ◽

Desorption Spectrum

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Investigation of the Pressure Dependent Hydrogen Solubility in a Martensitic Stainless Steel Using a Thermal Agile Tubular Autoclave and Thermal Desorption Spectroscopy

Metals ◽

10.3390/met11020231 ◽

2021 ◽

Vol 11 (2) ◽

pp. 231

Author(s):

Patrick Fayek ◽

Sebastian Esser ◽

Vanessa Quiroz ◽

Chong Dae Kim

Keyword(s):

Stainless Steel ◽

Thermal Desorption ◽

Hydrogen Diffusion ◽

Martensitic Stainless Steel ◽

Thermal Desorption Spectroscopy ◽

Hydrogen Uptake ◽

Hydrogen Solubility ◽

Automotive Components ◽

Set Up ◽

Service Application

Hydrogen is nowadays in focus as an energy carrier that is locally emission free. Especially in combination with fuel-cells, hydrogen offers the possibility of a CO2 neutral mobility, provided that the hydrogen is produced with renewable energy. Structural parts of automotive components are often made of steel, but unfortunately they may show degradation of the mechanical properties when in contact with hydrogen. Under certain service conditions, hydrogen uptake into the applied material can occur. To ensure a safe operation of automotive components, it is therefore necessary to investigate the time, temperature and pressure dependent hydrogen uptake of certain steels, e.g., to deduct suitable testing concepts that also consider a long term service application. To investigate the material dependent hydrogen uptake, a tubular autoclave was set-up. The underlying paper describes the set-up of this autoclave that can be pressurised up to 20 MPa at room temperature and can be heated up to a temperature of 250 °C, due to an externally applied heating sleeve. The second focus of the paper is the investigation of the pressure dependent hydrogen solubility of the martensitic stainless steel 1.4418. The autoclave offers a very fast insertion and exertion of samples and therefore has significant advantages compared to commonly larger autoclaves. Results of hydrogen charging experiments are presented, that were conducted on the Nickel-martensitic stainless steel 1.4418. Cylindrical samples 3 mm in diameter and 10 mm in length were hydrogen charged within the autoclave and subsequently measured using thermal desorption spectroscopy (TDS). The results show how hydrogen sorption curves can be effectively collected to investigate its dependence on time, temperature and hydrogen pressure, thus enabling, e.g., the deduction of hydrogen diffusion coefficients and hydrogen pre-charging concepts for material testing.

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The Role of Cr in H Desorption Kinetics in Rapidly Solidified Al

Materials Science Forum ◽

10.4028/www.scientific.net/msf.783-786.264 ◽

2014 ◽

Vol 783-786 ◽

pp. 264-269 ◽

Cited By ~ 3

Author(s):

Iya I. Tashlykova-Bushkevich ◽

Keitaro Horikawa ◽

Goroh Itoh

Keyword(s):

High Temperature ◽

Thermal Desorption ◽

High Purity ◽

Thermal Desorption Spectroscopy ◽

Secondary Phase ◽

Hydrogen Desorption ◽

Oxide Surface ◽

Desorption Kinetics ◽

Hydrogen Trapping ◽

Rapidly Solidified

Hydrogen desorption kinetics for rapidly solidified high purity Al and Al-Cr alloy foils containing 1.0, 1.5 and 3.0 at % Cr were investigated by means of thermal desorption analysis (TDA) at a heating rate of 3.3°C/min. For the first time, it was found that oxide inclusions of Al2O3 are dominant high-temperature hydrogen traps compared with pores and secondary phase precipitates resulted in rapid solidification of Al and its alloys. The correspondent high-temperature evolution rate peak was identified to be positioned at 600°C for high purity Al and shifted to 630°C for Al-Cr alloys. Amount of hydrogen trapped by dislocations increases in the alloys depending on Cr content. Microstructural hydrogen trapping behaviour in low-and intermediate temperature regions observed here was in coincidence with previous data obtained for RS materials using thermal desorption spectroscopy (TDS). The present results on hydrogen thermal desorption evolution indicate that the effect of oxide surface layers becomes remarkable in TDA measurements and show advantages in combinations of both desorption analysis methods to investigate hydrogen desorption kinetics in materials.

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