A comparison between the tensile and compressive creep behaviour of an 11 per cent chromium steel

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Abstract
Comparative tensile and compressive creep behaviour at constant stress has been studied for an 11 per cent chromium steel. No significant differences were observed for stresses and temperatures of engineering relevance, i.e. producing lives greater than 200 h. High stresses, producing shorter tensile lives, caused creep to occur more rapidly under tension owing to an earlier development of tertiary-type deformation. It is suggested that the deformation mechanisms are similar for the two modes of stressing but development of stable cracks under tension produces more rapid creep behaviour during the later stages of life.
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