Tuning the mechanical properties of copper by changing deformation temperature and recrystallization fraction

In order to reveal the effects of cryogenic temperature on the relationship between mechanical properties and recrystallization percentage, the tensile mechanical behaviors of partial recrystallized copper have been investigated by tensile test at 293 K and 77 K, respectively. It is found the yield...

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Bibliographic Details
Published in:Materials science & engineering. A, Structural materials : properties, microstructure and processing Structural materials : properties, microstructure and processing, 2022-09, Vol.853, p.143734, Article 143734
Main Authors: Lin, H.R., Tian, Y.Z., Sun, S.J., Zhang, Z.J., Zhang, Z.F.
Format: Article
Language:English
Subjects:
Copper
Cryogenic temperature
Deformation effects
Dislocation
Heterogeneous microstructure
Mechanical properties
Plastic deformation
Recrystallization
Strength
Tensile tests
Uniform elongation
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Summary:In order to reveal the effects of cryogenic temperature on the relationship between mechanical properties and recrystallization percentage, the tensile mechanical behaviors of partial recrystallized copper have been investigated by tensile test at 293 K and 77 K, respectively. It is found the yield strength of copper maintains approximate linearity with recrystallization percentage at 77 K and 293 K. Microscopic observations manifested that the deformation twinning was not activated and dislocations slip still dominated plastic deformation at 77 K. Based on the proliferation and annihilation of dislocations, an exponent hardening model was employed to explain the simultaneous improvement of strength and ductility caused by cryogenic temperature.
ISSN:0921-5093
1873-4936
DOI:10.1016/j.msea.2022.143734