Abstract
The application of liquefied gases in modern engineering requires materials suitable for service at temperatures approaching absolute zero. Aluminum and its alloys are not susceptible to sharp ductile-to-brittle transition at low temperatures and their ultimate tensile strength and yield strength are higher at low temperatures than at room temperature. Elongation of most aluminum alloys increases or remains constant with decreasing temperature. In addition, many aluminum alloys, including the Al-Mg alloys, possess good weldability. Therefore, aluminum alloys are widely used in vessels for storing and transporting LNG and other structures subject to extremely low temperatures. Selection of materials for use in LNG systems can be made by evaluating the properties of aluminum alloys and their welded joints over the low temperature range.
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Abbreviations
- D:
-
diameter
- K IC :
-
coefficient of stress intensity under conditions of plane deformation
- K max :
-
coefficient of stress intensity under maximum fracture load
- K Q :
-
coefficient of stress intensity under the load corresponding to 5% secant line
- R H :
-
notch radius
- UPE:
-
specific energy of crack propagation (unit propagation energy)
- δ:
-
relative elongation
- σ0.2 :
-
conditional yield strength in tension
- σ B :
-
ultimate tensile strength
- σ BH :
-
ultimate tensile strength of notched specimen
- σ BH /σ0.2 :
-
notch yield ratio
- σ p :
-
tensile strength for the case of eccentric tension of notched specimen
- ψ:
-
relative reduction in area
References
A. Ya. Ishchenko, M. I. Saenko, V. G. Ignat’ev, R. S. Kurochko, and I. P. Zamyatin, Automatic Weld. 4:65 (1977).
A. Ya. Ishchenko, M. I. Saenko, A. V. Lozovskaya, and G. B. Vasil’eva, Automatic Weld. 12:54 (1973).
A. Ya. Ishchenko, N. V. Novikov, N. I. Gorodysskii, and A. L. Maistrenko, Prob. Prochn. 6 (1975).
R. A. Kelsey and F. G. Nelson, in Advances in Cryogenic Engineering, Vol. 24, Plenum Press, New York (1978), p. 505.
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© 1978 Springer Science+Business Media New York
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Ishchenko, A.Y., Novikov, N.V. (1978). Mechanical Properties of Soviet and American Al-Mg Alloy Plates and Welds for LNG Systems. In: Timmerhaus, K.D., Reed, R.P., Clark, A.F. (eds) Advances in Cryogenic Engineering. Advances in Cryogenic Engineering, vol 24. Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-9853-0_56
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DOI: https://doi.org/10.1007/978-1-4613-9853-0_56
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