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Low cycle fatigue and creep behavior of recrystallized Molybdenum near room termperature
Author(s) -
Sun Z. M.,
Wang Z. G.,
Hödl H.,
Weiss B.,
Sticker R.
Publication year - 1995
Publication title -
materialwissenschaft und werkstofftechnik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.285
H-Index - 38
eISSN - 1521-4052
pISSN - 0933-5137
DOI - 10.1002/mawe.19950260905
Subject(s) - materials science , creep , molybdenum , atmospheric temperature range , dislocation , composite material , deformation (meteorology) , stress (linguistics) , activation energy , metallurgy , amplitude , thermodynamics , chemistry , physics , linguistics , philosophy , quantum mechanics
Abstract The deformation behavior of pure recrystallized molybdenum under cyclic and static loads was investigated in the temperature range between 30°C and 10O°C, for stress amplitudes between 100 MPa and 250 MPa and for static loads up to 200 MPa. The results show that in spite of the low test temperatures and stress levels the Mo material exhibits considerable plastic strains which depend sensitively on frequenez and small changes in temperature.The activation energy deduced for the static and dynamic deformation is less than 0.98 eV which indicates thermally activated processes, to be explained by a dislocation kink model as described in the literature. The low‐temperature fatigue behavior appears strongly influenced by creep‐fatigue interaction phenomena.