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The effects of aging and straining on the internal friction of hydrogen charged 1020 steel at low temperatures

✍ Scribed by L.C Weiner; M Gensamer


Publisher
Elsevier Science
Year
1957
Weight
348 KB
Volume
5
Category
Article
ISSN
0001-6160

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✦ Synopsis


It has been found that aging at room temperature or previous straining of hydrogen charged 1020 steel causes an internal friction peak at 105Β°K to appear, reach a maximum, decrease and finally disappear. This peak has been explained by a model which involves the dragging along of hydrogen atmospheres by oscillating dislocations.

In addition another peak at 50Β°K has been observed which is apparently due to stress-induced diffusion of interstitial hgdrogen.

LES EFFETS DU

VIEILLISSEMENT ET DE LA DEFORMATION AUX BASSES TEMPERA-TURES SUR LES VALEURS DE FRICTION INTERNE DUN ACIER 1020 CHARGE EN HYDROGENE Pour un acier 1020 charge en hydrogene, les auteurs ont trouve que le vieillissement B temperature ambiante, ou une deformation prealable, provoque it 105Β°K un pit de friction interne qui apparait, atteint un maximum deoroit, puis disparait. Ce pit est explique par un modele oti les atmospheres d'hydrogene sont attirees par des dislocations oscillantes. En outre, ils ont observe un autre pie It 50"K, provoque vraisemblablement par la diffusion de l'hydrogene interstitiel sous l'effet des tensions. DER EINFLUSS VON ALTERUNG UND VERFORMUNG AUF DIE INNERE REIBUNG VON WASSERSTOFFBELADENEN 1020 STAHL BEI TIEFEN TEMPERATUREN Es wurde gefunden, dass eine Alterung bei Raumtemperatur oder eine vorherige Verformung von wasserstoffbeladenem 1020 Stahl ein Maximum der inneren R&bung entstehen und wieder verschwinden l&s&. Da4 Maximum wurde in einem Model1 erklart, in dem oszillierende Versetzungen ihre Wasserstoffatmosphiiren mitnehmen. Ausserdem wurde ein anderes Maximum bei 50'K beobachtet, das anscheinend von einer spannungserzwungenen Diffusion von Wasserstoff auf Zwischengitterplatzen herrtihrt.


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