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Hydrogen effects

F. Zaera and G. A. Somoijai, in Hydrogen Effects in Catalysis Fundamentals and Practical Applications, Z. Paal and P. G. Menon, eds., Marcel Dekker, New York, 1988. [Pg.747]

Hydrogen Effects in Catalysis Fundamentals and Practical Applications, edited by Zoltan Paal and P. G. Menon... [Pg.674]

Hydrogen effect on the mechanical properties results in markedly enhanced ductility and lowered flow stress of the alloys therefore they become workable at much lower temperatures. [Pg.425]

This induced an increasing number of papers devoted to the study of the hydrogen effect on the mechanical properties of titanium alloys -lo SQjjjg interesting effects of hydrogen in titanium and its alloys are discussed below on the basis of the experimental data obtained at ISSP RAS (the early experiments were carried out in co-operation with the Institute of Metal Physics UD RAS). [Pg.425]

Hydrogen effect on the mechanical properties discussed below was studied on several a and a+fi alloys with the following nominal composition of metallic components (Russian trade marks given in parentheses) commercial titanium of nominal purity 99.3% (VTl-0), Ti-6Al-2Zr-1.5V-lMo (VT20), Ti-6A1-4.5V (VT6), Ti-6Al-2.5Mo-2Cr (VT3-1), Ti-4Al-1.5Mn (OT4), Ti-6.5Al-4Mo-2Sn-0.6W-0.2Si (VT25u) and others. The main features of their stress-strain behavior due to hydrogenation were much similar, but some individuality was characteristic of each alloy. [Pg.427]

The hydrogen effect on ductility and the flow stress will be considered first on the example of non-alloyed titanium. The Ti - H phase diagram is given in Fig. 1, and Fig. 2 shows the temperature dependence of ductility of Ti-a H alloys, A , for several X values. Tensile tests were run at a rate e 10" s . Ductility of the commercial... [Pg.427]

Figure 10. Hydrogen effect in compacted powder mixtures Ti + TiH2 (8 1). Compacted at 9 kbar - y, additionally annealed in vacuum at 735°C for 10 min - A, outgassed - Q-... Figure 10. Hydrogen effect in compacted powder mixtures Ti + TiH2 (8 1). Compacted at 9 kbar - y, additionally annealed in vacuum at 735°C for 10 min - A, outgassed - Q-...
A corresponding pressure effect on the flow stress was observed on hydrostatic extrusion of conical specimens of the same alloy through a die of 5 mm dia at 220°C. The basic alloy was extruded at P = 12 kbar up to the area ratio equal to 4.1 while the alloy hydrogenated to a = 0.20 extruded to the area ratio of 7.6 even at a lower pressure, P = 11 kbax . Similar pressure/hydrogen effects on the flow stress were also observed on hydrostatic extrusion of ZrH,c, VH,c and Nb,c alloys with x = 0 and 0.1-0.2 wt.%. [Pg.434]

These and other hydrogen effects can be useful for improvement of processing of industrial high-strength titanium alloys. [Pg.436]

As described earlier, the covalently bonded hydrogen, by passivating dangling bond defects and removing strained weak Si—Si bonds from the network, dramatically improves the semiconducting quality of amorphous silicon. Hence without the presence of hydrogen, effective amorphous semiconductor devices such as solar cells or thin film transistors would not be possible. Unfortunately, low defect density, high electronic quality... [Pg.409]

Hydrogen effect ch4, ch,cho, c2h5oh formed as by-products No effect... [Pg.256]

Garcia, L., French, R., Czemik, S., Chornet, E., Catalytic steam reforming of bio-oils for the production of hydrogen effects of catalyst composition, Appl. [Pg.143]

M. J. Morgan and M. H. Tosten, "Microstructure and Yield Strength Effects on Hydrogen and Tritium Induced Cracking in HERF Stainless Steel", Hydrogen Effects on Material Behavior, ed. N. R. Moody and A. W. Thompson, (Warrendale, PA TMS, 1990), 447-457. [Pg.234]


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