Superplastic-like deformation in some solid solution alloys

Korhonen, M. A.; Wilson, H.; Kuo, R.C.; Li, Che‐Yu

doi:10.1016/0921-5093(91)90315-e

Cited by 2 publications

(1 citation statement)

References 19 publications

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“…However, the m value is only 0?27 when the deformation temperature is 460uC. Nieh et al, [27][28][29] Taleff et al 30 and Korhonen et al 31 observed the same characteristic during hot deformation of other materials with coarse grains.…”

Section: Mechanical Behaviourmentioning

confidence: 88%

Microstructure evolution in hot deformation of 7050 aluminium alloy with coarse elongated grains

Hu¹,

Zhen²,

Chen³

et al. 2008

Materials Science and Technology

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Hot deformation of 7050 aluminium alloy with coarse elongated grains has been investigated by tensile tests conducted at 340 and 460uC and the strain rate of 1?0610 24 -1?0610 21 s 21 . When the 7050 aluminium alloy was conducted at 460uC and 1?0610 22 s 21 , the maximum elongation of 273% is achieved and large plastic deformation was carried out at an almost constant stress. The microstructure evolution under the deformation condition is characterised using OM, SEM, EBSD and TEM in detail. The results show that the microstructure evolution is realised by continuous dynamic recrystallisation in coarse grains. The increase in misorientation is proportional to the increase in the true strain, and the k value, the increasing rate of average misorientation angle, is 15?7u. The primary hot deformation mechanisms of the 7050 aluminium alloy are localised grain boundary sliding and dislocation gliding, which can increase the grain boundary misorientation continuously.

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