Indian Welding Journal

H. K. D. H. Bhadeshia ¹

Affiliations
1 University of Cambridge, Department of Materials Science and Metallurgy Pembroke Street, Cambridge CB2 3QZ, GB

Abstract

Ferritic steels have relatively low thermal expansion coefficients and can be alloyed to resist creep and oxidation during prolonged service at temperatures which can exceed 600°C. Their use in the construction of power plant places severe demands on welding alloys. The acceptability of a weld metal depends not only on the mechanical properties, but also on the ability of the welded joint to be heat-treated in a manner which is compatible with the parent materials.

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L. E. Svensson , H. K. D. H. Bhadeshia

Abstract

Metals are useful materials because of their sophistication and low cost. The many phase transformations and processing variables associated with them can be exploited to achieve a very large range of desirable properties. The very complexity that makes metals so useful also makes their design difficult. This is particularly so for welding alloys which have an additional level of complexity given that the ultimate properties have to be achieved in the as welded condition.

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