Dynamic recrystallization in high purity aluminum
- RWTH Aachen (Germany). Inst. fuer Metallkunde und Metallphysik
It is commonly believed, that Al doesn`t undergo dynamic recrystallization (DRX), although DRX has been proven to occur in all other investigated pure f.c.c. metals. The generally accepted explanation for the nonoccurrence of DRX in Al is that due to the high stacking fault energy in Al a stable dislocation arrangement is established by extensive dynamic recovery, so that the value of the stored energy is too low to cause DRX. However, there have been always doubts to this interpretation. Yamagata performed compression tests on Al single crystals with an in-situ observation of X-ray diffraction patterns. From the concurrent occurrence of oscillations in the flow curve and new spot patterns during the test he concluded, that the multipeak stress oscillations were caused by DRX. The current investigation confirms Yamagata`s results and shows that DRX of Al takes place in tensile tests as well as cannot be attributed to an artifact due to friction and an inhomogeneous deformation during compression tests. In addition the nucleation of DRX was investigated by the SEM/EBSD-method.
- OSTI ID:
- 556510
- Journal Information:
- Scripta Materialia, Vol. 37, Issue 11; Other Information: PBD: 1 Dec 1997
- Country of Publication:
- United States
- Language:
- English
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