scholarly journals Hydrogen uptake in high-strength steel corroded in actual use environment and in laboratory corrosion condition, and interpretation of diffusive hydrogen in Thermal-Desorption-Spectroscopy-based Gas Chromatograph.

2018 ◽  
Vol 2018 (63) ◽  
pp. 27-39
Author(s):  
Yasuhide ISHIGURO ◽  
Kazuki FUJIMURA ◽  
Shinji OOTSUKA ◽  
Akio KOBAYASHI
Keyword(s):  
Thermal Desorption ◽  
High Strength Steel ◽  
Thermal Desorption Spectroscopy ◽  
High Strength ◽  
Hydrogen Uptake ◽  
Gas Chromatograph ◽  
Corrosion Condition ◽  
Actual Use

scholarly journals Improved Accuracy of Thermal Desorption Spectroscopy by Specimen Cooling during Measurement of Hydrogen Concentration in a High-Strength Steel

Materials ◽  
2020 ◽  
Vol 13 (5) ◽  
pp. 1252 ◽  
Author(s):  
Eric Fangnon ◽  
Evgenii Malitckii ◽  
Yuriy Yagodzinskyy ◽  
Pedro Vilaça
Keyword(s):  
Thermal Desorption ◽  
Hydrogen Concentration ◽  
High Strength Steel ◽  
Vacuum Chamber ◽  
Thermal Desorption Spectroscopy ◽  
High Strength ◽  
Steel Sample ◽  
Martensitic Steels ◽  
Hydrogen Flux ◽  
Redistribution Of Hydrogen

Thermal desorption spectroscopy (TDS) is a powerful method for the measurement of hydrogen concentration in metallic materials. However, hydrogen loss from metallic samples during the preparation of the measurement poses a challenge to the accuracy of the results, especially in materials with high diffusivity of hydrogen, like ferritic and ferritic-martensitic steels. In the present paper, the effect of specimen cooling during the experimental procedure, as a tentative to reduce the loss of hydrogen during air-lock vacuum pumping for one high-strength steel of 1400 MPa, is evaluated. The results show, at room temperature, the presence of a continuous outward hydrogen flux accompanied with the redistribution of hydrogen within the measured steel during its exposure to the air-lock vacuum chamber under continuous pumping. Cooling of the steel samples to 213 K during pumping in the air-lock vacuum chamber before TDS measurement results in an increase in the measured total hydrogen concentration at about 14%. A significant reduction in hydrogen loss and redistribution within the steel sample improves the accuracy of hydrogen concentration measurement and trapping analysis in ferritic and martensitic steels.

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

Metals ◽  
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.

Thermal Desorption of Hydrogen from AISI 316L Stainless Steel and Pure Nickel

2013 ◽  
Vol 344 ◽  
pp. 71-77 ◽  
Author(s):  
Olga Todoshchenko ◽  
Yuriy Yagodzinskyy ◽  
Hannu Hänninen
Keyword(s):  
Stainless Steel ◽  
Thermal Desorption ◽  
316L Stainless Steel ◽  
Hydrogen Diffusion ◽  
Thermal Desorption Spectroscopy ◽  
Hydrogen Uptake ◽  
Pure Metal ◽  
Pure Nickel ◽  
Aisi 316L ◽  
Aisi 316L Stainless Steel

Hydrogen diffusion and trapping in AISI 316L stainless steel and pure nickel are studied with thermal desorption spectroscopy method. Specific features of hydrogen uptake and desorption for a multi-component alloy in comparison with that for pure metal and the effects of hydrogen concentration profile after electrochemical charging on the hydrogen desorption are discussed. It is shown that hydrogen diffusion and trapping in multi-component alloy are caused by the specific atomic distribution of hydrogen in the crystal lattice of alloy.

scholarly journals Numerical Analysis of Influence of Hydrogen Charging Method on Thermal Desorption Spectra for Pre-strained High-Strength Steel

2014 ◽  
Vol 54 (1) ◽  
pp. 153-159 ◽  
Author(s):  
Ken-ichi Ebihara ◽  
Takashi Iwamoto ◽  
Yukio Matsubara ◽  
Hiroki Yamada ◽  
Tsukasa Okamura ◽  
...  
Keyword(s):  
Numerical Analysis ◽  
Thermal Desorption ◽  
High Strength Steel ◽  
High Strength ◽  
Hydrogen Charging

scholarly journals The effect of Nb on the high strain rate hydrogen embrittlement of Q&P steel

2021 ◽  
Vol 250 ◽  
pp. 03007
Author(s):  
Florian Vercruysse ◽  
Lisa Claeys ◽  
Tom Depover ◽  
Kim Verbeken ◽  
Patricia Verleysen ◽  
...  
Keyword(s):  
Strain Rate ◽  
High Strength Steels ◽  
Thermal Desorption Spectroscopy ◽  
High Strength ◽  
Hydrogen Uptake ◽  
High Hydrogen ◽  
Damage Initiation ◽  
Advanced High Strength Steels ◽  
Dynamic Tensile Loading ◽  
Carbon Martensite

Quenching and Partitioning (Q&P) steels are, due to their excellent combination of strength and ductility, seen as good candidates for the third generation advanced high strength steels (AHSS). Although the TRIP effect is beneficial for the overall mechanical behaviour of these steels it potentially can have detrimental effects when strained in a hydrogenenriched environment. The solubility of hydrogen is high in austenite but low in high carbon martensite. Martensite is even in the absence of hydrogen already a possible damage initiation spot. The effect of hydrogen under static and dynamic tensile loading was evaluated in a Q&P and a Nb micro-alloyed Q&P steel. Experiments were carried out under a strain rate ranging from 0.03 s-1 till 500 s-1 and correlated with the hydrogen uptake characterised via thermal desorption spectroscopy (TDS). The presence of Nb resulted in a 25% increase in the hydrogen uptake capacity. A higher susceptibility to hydrogen was observed in the Nb steel partially due to the high hydrogen fraction, but also because of the larger fraction of low stability austenite. However, when tested under dynamic conditions the hydrogen susceptibility is minor and even improved in the micro-alloyed Q&P steel compared to the standard Q&P steel.

Study of the Hydrogen Traps in a High Strength TRIP Steel by Thermal Desorption Spectroscopy

2012 ◽  
Vol 706-709 ◽  
pp. 2253-2258 ◽  
Author(s):  
Diana Pérez Escobar ◽  
Lode Duprez ◽  
Kim Verbeken ◽  
Marc Verhaege
Keyword(s):  
Grain Boundaries ◽  
Thermal Desorption ◽  
Trip Steel ◽  
Cold Deformation ◽  
Thermal Desorption Spectroscopy ◽  
High Strength ◽  
Trip Steels ◽  
Depth Study ◽  
Different Temperatures ◽  
Steel Trip700

Thermal desorption spectroscopy (TDS) is a very important tool in hydrogen related research. It allows to distinguish between the different types of microstructural hydrogen traps based on the analysis of the different temperatures at which hydrogen desorbs from the material during heating. These peak temperatures depend on the metallurgical and microstructural characteristics of the steel under investigation and provide important information on the possible mechanisms for hydrogen embrittlement (HE). In the present work, multiple TDS experiments and an in-depth study of the microstructure were performed on a TRIP steel (TRIP700) that was previously cold deformed in order to make a correlation between the microstructural features of this material, e.g. grain boundaries, dislocations, martensite formation and the peaks that became visible during TDS. The results obtained for the TRIP grade were compared with those obtained for electrolytic pure iron, which only contained a limited amount of possible trap sites such as grain boundaries and an increasing amount of dislocations due to previous application of cold deformation. Significant differences between both materials and a significant impact of the degree of cold deformation for TRIP steels were observed.

Study on Mechanical Performance of Corroded High-Strength Steel Bars

2011 ◽  
Vol 250-253 ◽  
pp. 2524-2529
Author(s):  
Yang Hang Shi ◽  
Shao Feng Chu ◽  
De Hai Yu
Keyword(s):  
Experimental Method ◽  
High Strength Steel ◽  
Mechanical Performance ◽  
High Strength ◽  
Tension Test ◽  
Engineering Practice ◽  
Accelerated Corrosion ◽  
Corrosion Condition ◽  
Steel Bars ◽  
Different Diameters

In this paper, the experimental method is adopted to study the mechanical performance of corroded high-strength steel bars. HRB400 and HRB500 with different diameters are corroded by electrifying accelerated corrosion in the laboratory, followed the tension test on these corroded bars with different corroded degree. The studying of the corrosion condition and mechanical performance of corroded high-strength steel bars lay the basic foundation for the analysis and research on their selection and relevant structural resilience which provide the reference basis for engineering practice.

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