In this context, the present paper aims to study hydrogen diffusion and trapping in a quenched and tempered 42CrMo4 steel by means of electrochemical
HYDROGEN DEGRADATION OF STEEL-DIFFUSION AND hydrogen reaching the exit side increases and reaches a steady-state with time. Time tb and the area under the curve is representative of the metals characteristics. Fig. 1. Crack advance Vs temperature in AISI 4130  Fig. 2. Hydrogen diffusion curve  Hydrogen diffusion obeys Ficks first law
ii) hydrogen diffusion in steel with the interaction between lattice defects, iii) hydrogen segregation at grain boundary, and iv) reduction of the cohesive energy of grain bound-ary. Thermal desorption analysis has successfully revealed hydrogen trapping behavior by various kinds of defects,
Hydrogen Permeation in X65 Steel under Cyclic Loading This experimental work analyzes the hydrogen embrittlement mechanism in quenched and tempered low-alloyed steels. Experimental tests were performed to study hydrogen diffusion under applied cyclic loading. The permeation curves were fitted by considering literature models in order to evaluate the role of trappingboth reversible and irreversibleon the diffusion mechanism.
Hydrogen Permeation in X65 Steel under Cyclic LoadingThis experimental work analyzes the hydrogen embrittlement mechanism in quenched and tempered low-alloyed steels. Experimental tests were performed to study hydrogen diffusion under applied cyclic loading. The permeation curves were fitted by considering literature models in order to evaluate the ro
Oct 01, 2016 · Hydrogen trapping. Hydrogen diffusion is often studied using the permeation technique of Devanathan and Stachurski . This permeation method can provide quantitative information, such as the effective hydrogen diffusion coefficient, D eff, the hydrogen concentration, C H, and the hydrogen trapping site density. This permeation technique was used in the present research to study hydrogen diffusion and trapping
Hydrogen trapping in some advanced high strength steelshydrogen trapping site density. This permeation technique was used in the present research to study hydrogen diffusion and trapping in DP and Q&P AHSS. Hydrogen atoms are located in interstitial sites and are trapped by microstructure features such as voids, dislocations, grain boundaries, carbide interfaces, and impurities [16-18].
Palladium coating on quenched-tempered martensitic DL is the true lattice diffusion coefficient without effects of trapping.The diffusion coefficient is constant in the coating and no trapping occurs. The boundary condition at entry side is constant hydrogen concentration C0=15 mol.m-3(1.9 wppm) and C=0 at exit side. The trapping is simulated with a trap density NT= 50 mol.m
P14 - Hydrogen Embrittlement study of X4CrNiMo 16.5.1 martensitic stainless steel and its weld:use of standard disk pressure tests P15 - Effect of hydrogen on the tensile properties of 42CrMo4 steel quenched and tempered at different temperaturesHydrogen diffusion and trapping in 42CrMo4 quenched and Hydrogen diffusion and trapping in 42CrMo4 quenched and tempered steel:Influence of quenching temperature and plastic deformation