✍ Scribed by J McGrath; R Rawlings
No coin nor oath required. For personal study only.
After an allowance has been made for a background internal friction rising with temperature, the peaks in the internal friction/temperature curves for cold worked steel and for martensitic steel have been found to be describable in terms of a lognormal distribution of relaxation times. The steels used contained 0.7 and 0.75% C, the frequency of vibration was about 1 c/s and the surface sheer strein was 1.3 x 10-4. The lognormal distribution in relaxation times could be interpreted as being due to a similar distribution in the square of the dislocation loop lengths. DISTRIBUTIOS LOGXORMALE DES TEMPS DE RELAXATION DANS LE PIC A 250°C DE L'ACIER Si l'on admet que le fond continu du frottement intbrieur augmente avec la tempbrature, les pits de frottement inter&r d'un acier d&form+? zt froid et d'un acier mertensitique peuvent se deerire b partir d'une distribution lognormale des temps de relaxation. Les aciers utilis& pour ces es&s contenaient 0.7 et 0.75 % C, la frequence Btltit d'environ 1 c/s et le ciseillement en surface de 1'Bprouvette Btait 1,3 x IO-'. On peut considerer que la, distribution lognormale des temps de relaxation est due I une distribution similaire des car&s des longueurs de boubles de dislocations. NORMALVERTEILUNG DER RELAXATIONSZEITLOGARITHMEN BEIM 250% DBMPFUNGSMAXIMUM IN STAHL Nach Abzug eines mit der Temperrttur zunehmenden Untergrundes der inneren Reibung kiinnen die Maxima im Temperaturverlsuf der inneren Reibung kaltverformter und martensitischer Stiihle mit einer Normalverteilung der Relaxationszeitlogerithmen beschreiben werden. Die Stilhle enthielten 0.7 bzw. 0.75% C, die Schwingungsfrequenz war etwa 1 c/s, und die Scherungen an der Oberfliiche betrugen 1.3 x 10-4. Die Normalverteilung der Relaxationszeitlogarithmen kann zurtickgefiihrt werden auf eine iihnliche Verteilung der Quadrate der Versetzungsringliingen.
📜 SIMILAR VOLUMES
## Abstract Values of one‐bond __J__(C^35^ Cl) and __T__~1~(^35^Cl) were determined for small chlorine‐containing molecules through ^13^C scalar relaxation in the rotating frame. A method is suggested for evaluating the contribution of scalar relaxation which eliminates experimental imperfections.
The dependence on frequency of the damping maximum of hardened cement paste (hcp) in the region of-90°C has been analysed in a frequency range between I kHz and 9 kHz. The bending vibration of an hep beam has been induced and the eigenfrequency and damping measured. After the Arrhenius-equation the
The and of deuterium in 13C/2H double-labeled 2@(R/S),5@(R/S)-