Dislocation arrangements in aluminum deformed by repeated tensile stresses
作者： C.E Feltner
DOI: 10.1016/0001-6160(63)90021-X
关键词: Aluminium 、 Materials science 、 Transmission electron microscopy 、 Ultimate tensile strength 、 Creep 、 Cyclic stress 、 Dislocation 、 Composite material 、 Yield (engineering) 、 Dislocation creep 、 Metallurgy
摘要: Abstract Transmission electron microscopy is used to study the dislocation arrangements formed in aluminum at 78° and 300°K by action of repeated tensile stresses. Although a pronounced macroscopic cyclic stress induced creep effect observed, pattern on first cycle 78°K not grossly altered subsequent cycling. The density cell size undergo slight increase decrease, respectively. Contrary published results fatigue under reversed stresses, loop deformed significantly larger than produced unidirectional straining. present information additional straining low temperature yield phenomenon f.c.c. metals support mechanism based point defect-dislocation interaction as satisfactory explanation for creep.
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