面心立方金属の変形集合組織におよぼすすべり系の潜在硬化の影響について

抄録

For metals of low stacking fault energy, it appears that the amount of the (112)[\={1}\={1}1] texture component decreases with increasing rolling reduction owing to the normal slip rotation toward (111)[\={1}\={1}2] as well as the mechanical twinning that converts (112)[\={1}\={1}1] to (552)[\={1}\={1}5].
The resolved shear stress on the slip systems which rotate (112)[\={1}\={1}1] toward (111)[\={1}\={1}2] is lower than that of systems, leading to the rotation in the opposite direction between them. Hence the slip rotation away from (112)[\={1}\={1}1] to (111)[\={1}\={1}2] can be explained on the basis of latent hardening of slip systems.
The cause of latent hardening is considered to be the rocking of dislocations lying on the {111} plane which intersects the (111) plane roughly parallel to the rolling plane, because the width of stacking faults on the (111) plane is extended remarkably during rolling and plates of deformation twinsare formed along the (111) plane.
The rolling texture transition and the stacking fault energy dependence of the wire texture in fcc metals are considered to be due to the three superposed mechanisms, i, e., cross slip, mechanical twinning and latent hardening.