New Elinvar-type Alloy "Tungelinvar" in the Ternary System of Cobalt, Iron and Tungsten, and the Characteristics Dependent on the Addition of Nickel
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概要
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According to the rule of the small expansibility of invar proposed previously by one of the present authors it was proposed that there are some alloys of invar and elinvar type in the cobalt, iron and tungsten system and in the quaternary system containing nickel besides these. So, the thermal expansion coefficient, the rigidity modulus and its temperature coefficient were examined with the ternary and the quaternary alloys mentioned above in annealed state. It was found that the temperature coefficient of rigidity modulus showed a negative minimum value of -0.7×10^<-5> at the composition having the minimum thermal expansion coefficient of 7.39×10^<-6> in the ternary system ; the figures of the curves of temperature coefficient of the modulus were almost the same as those obtained previously with alloys containing cobalt, iron and chromium, cobalt, iron and vanadium, and also cobalt, iron and molybdenum with the exception that the present alloys did not show any positive coefficient. But, it has been proved that there are some alloys of invar and elinvar type in this ternary system as expected. When 10 percent of nickel was added to the ternary alloys, the range showing positive temperature coefficient of the modulus began to appear. With the increase of nickel content, the minimum value of the thermal expansion coefficient became small and the positive maximum value of the temperature coefficient of the modulus larger, and the composition at which these special characteristics were observed shifted toward the side of low cobalt and low tungsten, finally reaching 36 percent of nickel in the binary system of iron and nickel, showing the same effect as case of nickel being added to the alloys of cobalt, iron and chromium, cobalt, iron and vanadium, and cobalt, iron and molybdenum. These new ternary and quaternary alloys having small temperature coefficient of the modulus have been named "Tungelinvar".
- 東北大学の論文
著者
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Masumoto Hakaru
The Research Institute Of Electric And Magnetic Alloys
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Masumoto Hakaru
The Research Institute For Iron Steel And Other Metals
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Masumoto Hakaru
(presently)the Research Institute Of Electric And Magnetic Alloys
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Saito Hideo
The Research Institute For Iron Steel And Other Metals
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SUGAI Yutaka
The Research Institute for Iron, Steel and Other Metals
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Sugai Yutaka
The Research Institute For Iron Steel And Other Metals
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Saito Hideo
The Resarch Institute For Iron Steel And Other Metals
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Masumoto H.
The Research Institute for Iron, Steel and Other Metals
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