Evaluation of Hydrogen Trapping in Iron-Based Alloys by Thermal Desorption Spectroscopy

2014 ◽  
pp. 49-56 ◽  
Keyword(s):  
Thermal Desorption ◽  
Thermal Desorption Spectroscopy ◽  
Hydrogen Trapping ◽  
Iron Based

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

2014 ◽  
Vol 783-786 ◽  
pp. 264-269 ◽  
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.

scholarly journals Evaluation of the Effect of TiC Precipitates on the Hydrogen Trapping Capacity of Fe-C-Ti Alloys

2014 ◽  
Vol 922 ◽  
pp. 102-107 ◽  
Author(s):  
Tom Depover ◽  
E. van den Eeckhout ◽  
E. Wallaert ◽  
Z. Zermout ◽  
Kim Verbeken
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Thermal Desorption ◽  
Thermal Desorption Spectroscopy ◽  
Hydrogen Trapping ◽  
Melt Extraction ◽  
Trap Hydrogen ◽  
Ti Alloys ◽  
Transmission Electron ◽  
Different Characteristics

The present work evaluates the hydrogen trapping behavior of different laboratory cast generic Fe-C-Ti martensitic alloys. Titanium carbides were precipitated in the materials by well-designed heat treatments. A quenched and tempered martensitic matrix with final strength above 1000 MPa was aimed for and verified by means of hardness measurements. Tempering allowed generating precipitates with different characteristics in terms of coherency, size and distribution due to the secondary hardening effect, as was evaluated by transmission electron microscopy. The hydrogen trapping capacity of the TiC precipitates was investigated by thermal desorption spectroscopy, while melt extraction was performed to determine the amount of hydrogen present after cathodic hydrogen charging. Generally, it could be concluded that the incoherent particles in the quenched material were not able to trap hydrogen, whereas the quenched and tempered material trapped hydrogen at the interface of small probably coherent TiC.

Hydrogen trapping in martensitic steel investigated using electrochemical permeation and thermal desorption spectroscopy

2011 ◽  
Vol 65 (10) ◽  
pp. 859-862 ◽  
Author(s):  
S. Frappart ◽  
A. Oudriss ◽  
X. Feaugas ◽  
J. Creus ◽  
J. Bouhattate ◽  
...  
Keyword(s):  
Thermal Desorption ◽  
Martensitic Steel ◽  
Thermal Desorption Spectroscopy ◽  
Hydrogen Trapping
Sign in / Sign up

Export Citation Format

Share Document