Metallographic Investigation on the Effect of Cryogenic Temperature on Steel Weldments
Materials are subjected to low temperatures either intentionally as in the case of cryogenic fuels or non-intentionally as in the case of aerospace environment and are observed to undergo changes in their properties. Microstructural changes are the premier indications of changes in the properties of materials. This paper investigates the effect of cryogenic temperature on the microstructure of low alloy steel weldments. The weldments were subjected to liquid nitrogen temperature of 77K and the microstructures were analyzed using optical microscope and transmission electron Microscope. A distinct change in the microstructure was observed which would reason out the changes in the mechanical properties of weldments.
R. Varatharajoo, F.I. Romli, K.A. Ahmad, D.L. Majid and F. Mustapha
S. R. Mohideen et al., "Metallographic Investigation on the Effect of Cryogenic Temperature on Steel Weldments", Applied Mechanics and Materials, Vol. 629, pp. 456-460, 2014