Remarkable transitions of yield behavior and Lüders deformation in pure Cu by changing grain sizes

Fully recrystallized ultrafine-grained (UFG) pure Cu specimens were fabricated by high-pressure torsion (HPT) and controlled annealing. The recrystallized UFG Cu with a minimum mean grain size of 0.51μm showed high yield strength, good ductility, obvious yield drop and large Lüders strain during ten...

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Bibliographic Details
Published inScripta materialia Vol. 142; pp. 88 - 91
Main Authors Tian, Y.Z., Gao, S., Zhao, L.J., Lu, S., Pippan, R., Zhang, Z.F., Tsuji, N.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.01.2018
Subjects
High-pressure torsion (HPT)
Lüders band
Ultrafine-grain (UFG)
Yield
Cu
Yield
High-pressure torsion (HPT)
Lüders band
Ultrafine-grain (UFG)
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Summary:Fully recrystallized ultrafine-grained (UFG) pure Cu specimens were fabricated by high-pressure torsion (HPT) and controlled annealing. The recrystallized UFG Cu with a minimum mean grain size of 0.51μm showed high yield strength, good ductility, obvious yield drop and large Lüders strain during tensile test. The mechanical behavior of the Cu specimen became sensitive to the change in the grain size from 0.2μm to 4.2μm. The continuous transitions of yield behavior and Lüders deformation with grain sizes were discussed. [Display omitted]
ISSN:1359-6462
1872-8456
DOI:10.1016/j.scriptamat.2017.08.034