TEMPERATURE DEPENDENCE OF YOUNG'S MODULUS AND THE DAMPING DECREMENT OF NICHROME ALLOYS WITH ADMIXTURES OF TUNGSTEN OR MOLYBDENUM

Journal Article · Tue Mar 01 04:00:00 EST 1960 · Ukrain. Fiz. Zhur.

OSTI ID:4123264

Khodov, Z L; Il'chenko, V I

The effect of molybdenum and tungsten admixtures on Young's modulus and the internal friction of nichrome was investigated. The temperature dependence of these magnitudes was also studied. It was found that for nickel-chromium-- tungsten alloys, an increase in the tungsten concentration from 0.6 to 2.86 at.% led to an increase in the modulus throughout a temperature range of 20 to 800 deg C. The value of the damping decrement of these alloys changed very slightly in the range from room temperature to 500 to 550 deg C. On further rise in temperature there was a very sharp increase in the decrement. Of the investigated alloys of the nickel -- chromium -- tungsten system, containing from 0.97 to 6.44 at.% of molybdenum, the alloy with 6.44 at.% of molybdenum had the least value of Young's modulus. The nature of the temperature dependence of the damping decrement for nickel -- chromium-- molybdenum alloys is similar to that obtained for nickel--chromium--tungsten alloys. The sharp rise in the value of the decrement, observed at a definite temperature for each alloy, is probably associated with viscous slipping along the grain boundaries. The dependence of the modulus on the molybdenum or tungsten concentmation obtained in this research furnishes grounds for the assumption that molybdenum and tungsten admixtures have a similar effect on nickel-- chromium alloys (at ay rate, in the case of a slight admixture of the third element (up to 3 at. %)). This is evidently owing to the fact, that these metals belong to one and the same subgroup of the Mendeleyev system. (auth)

• Research Organization: Inst. of Physics of Metals, Academy of Sciences, Ukrainian SSR
• NSA Number: NSA-15-000692
• OSTI ID: 4123264
• Journal Information: Ukrain. Fiz. Zhur., Journal Name: Ukrain. Fiz. Zhur. Vol. Vol: 5
• Country of Publication: Country unknown/Code not available
• Language: Ukrainian

Related Subjects

CHROMIUM ALLOYS
ELASTICITY
FRICTION
GRAIN BOUNDARIES
HIGH TEMPERATURE
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
TEMPERATURE
TUNGSTEN ALLOYS