27 Micromechanics of Crystallographic Slip
Fundamental concepts concerning the micromechanics of crystalline plasticity are reviewed in this chapter. An overview of deformation mechanisms is given for crystalline materials that possess grain sizes that are said to be “traditional,” i.e., larger than about 2 μm in diameter. Some brief comments are made about the trends in deformation mechanisms when the grain sizes are much below this range (nanograins).
27.1 Early Observations
In a series of articles published between 1898 and 1900 Ewing and Rosenhain summarized their metallographic studies of deformed polycrystalline metals. The conclusion they reached concerning the mechanisms of plastic deformation provided a remarkably accurate picture of ...