Understanding of the metallurgical factors which determine the strength characteristics of metals has progressed to the point where in principle steels can be tailor-made to meet specific engineering requirements. The lecture describes some of the basic features underlying the physical metallurgy of steels particularly in relation to differing stress situations, e.g. creep, fatigue, brittle-ductile failure, etc., and the quantification of the metallurgical parameters relating to deformation and fracture. Reference is made to the direction of future developments and the new experimental techniques which should contribute to these.
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