Static Recovery and the Orthogonal Strain Path Change Effect in IF Steel

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Tensile tests have been carried out in the rolling and transverse directions of 'interstitialfree' (IF) steel cold rolled to a strain of εh= -0.18. Tests in the transverse direction showed the characteristic features of the orthogonal strain path change effect, with an initially increased flow stress- compared to tests in the rolling direction- followed by a transient regime of very low strain hardening. Tests were also carried out following recovery annealing of the prestrained sheet at 500°C and 600°C. Static recovery had a marked effect on the strain-induced anisotropy, but this was not eliminated even when the cell structure generated by prestraining haD condensed to one consisting of low-angle boundaries. This supports the view that the length scale, with respect to active slip systems, between boundary obstacles is a significant factor in the orthogonal path change effect.

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Periodical:

Edited by:

P. B. Prangnell and P. S. Bate

Pages:

141-148

DOI:

10.4028/www.scientific.net/MSF.550.141

Citation:

P. S. Bate et al., "Static Recovery and the Orthogonal Strain Path Change Effect in IF Steel", Materials Science Forum, Vol. 550, pp. 141-148, 2007

Online since:

July 2007

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$35.00

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