高純度鉄の疲労変形機構に関するX線的研究 : 結晶粒方位依存性について

概要

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Coarse grained polycrystalline aggregates of high-purity iron (99.996 at.%) have been fatigued in alternating bending at room temperature, and the behavior of individual grains gas been studied by the Z-ray technique together with optical microscopy. The fatigue deformation of the grains orientation near the <001>-<011> side of stereographic triangle shows slip traces, while an other grain near the <111> corner fives no trace of slip. In particular case, the traces are exhibited also on the {001} plane when the crystallographic conditions are favorable for cleavage fracture. Because of the constraints of the surrounding grains, the microstructural change of deformation is much more complicated in the grain sited in the central part of the specimen than that located in the fringes of the specimen, even when both the grains possess resembling orientations. Localized slip zones are formed in the grain with definite orientation. The mechanism of fatigue deformation of b. c. c. metals is discussed in connection with crystallographic observations.
社団法人日本材料学会の論文
1972-09-15