Experimental study demonstrates crystallographic control of dislocation boundaries in AA1050 aluminium during warm tension, indicating crystallography outweighs macroscopic stress.
The dislocation structure in aluminium (AA1050) has been investigated after tension at 300°C (∼0·6T M) at a strain rate of 0·1 s−1 to a true strain of 0·15. The grain orientation dependence of the morphology and of the crystallographic planes of extended planar dislocation boundaries is similar to cold tension. It is demonstrated that crystallography has a stronger influence than the macroscopic stress on the boundary plane. Effects of strain and temperature increases are briefly illustrated and discussed.
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He et al. (2005) studied this question.
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