https://orcid.org/0000-0002-1866-6930
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ABSTRACT
The rate sensitivity of multiple obstacle aluminium alloy system was measured using the stress relaxation method. A discrepancy was observed between the slope of the Haasen plot (rate sensitivity of dislocation–dislocation interaction) in pure metals and in alloys strengthened by multiple obstacles. Considering a simplifying assumption of the constant obstacle force–distance profile, it is suggested that slope of the Haasen plot is governed by glide dislocations’ length taking part in a thermally activated event. The relative strength and spacing of obstacles (forest dislocations, solutes and precipitates) is proposed to affect the thermally activated dislocation length, which in turn manifests as the difference in slope of the Haasen plot.
Acknowledgements
The authors thank Materials Testing Lab, IIT Kanpur. They also acknowledge the reviewers for a comprehensive review of their work, which has certainly helped us in improving our understanding of transient mechanical tests and the related concepts.
Disclosure statement
No potential conflict of interest was reported by the authors.
ORCID
Manasij Yadava http://orcid.org/0000-0002-1866-6930