Abstract
In structural alloy tensile specimens undergoing mechanical work in a liquid-helium bath, internal temperature increases are favored by their low specific heat and thermal conductivity at this temperature (4 K). The well-known phenomenon of discontinuous yielding is commonly attributed to adiabatic heating of the specimen [1,2]. The possible occurrence of such heating must be considered in testing structural materials for liquid-helium-temperature applications. Therefore, temperatures of small tensile specimens of AISI 304L stainless steel were measured during straining at 4 K at several strain rates. The number and magnitudes of the temperature rises and the number of load drops were used to calculate a specimen temperature profile during load drops. Examination of a specimen after one load drop occurred showed that only a small portion of the specimen deformed. The observed temperature rises and load drops were compared with calculated values. The possible effect of a latent heat of martensitic transformation on the specimen temperature was considered.
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© 1980 Plenum Press, New York
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Read, D.T., Reed, R.P. (1980). Heating Effects During Tensile Tests of Aisi 304L Stainless Steel At 4 K. In: Clark, A.F., Reed, R.P. (eds) Advances in Cryogenic Engineering Materials . Springer, Boston, MA. https://doi.org/10.1007/978-1-4613-9859-2_9
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DOI: https://doi.org/10.1007/978-1-4613-9859-2_9
Publisher Name: Springer, Boston, MA
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