Title:
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Softening and hardening of ECAP nickel under ultrasonic treatment
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Author:
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Zhilyaev, A. P.; Samigullina, A. A.; Medvedeva, A. E.; Sergeev, S. N.; Cabrera Marrero, José M.; Nazarov, A. A.
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Other authors:
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Universitat Politècnica de Catalunya. Departament de Ciència dels Materials i Enginyeria Metal·lúrgica; Universitat Politècnica de Catalunya. PROCOMAME - Processos de Conformació de Materials Metàl·lics |
Abstract:
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Commercially pure nickel was processed by equal channel angular pressing (ECAP) through
route Bc for 12 passes to obtain an ultrafine grained (UFG) microstructure and further subjected
to an ultrasonic treatment (UST) which introduced a maximum amplitude equivalent to anormal
stresses of 100 MPa in a steady state regime. It was observed that the microstructure of UFG Ni
can be differently altered depending on the position in the sample, i.e. on the amplitude of the
ultrasonic wave. The microstructural analysis demonstrated a lower dislocation density (due to
the activation of recovery) at the cross section of the specimen subjected to UST at an amplitude
equal to 0.8 of the maximum one, plus enhanced hardening in the cross section at the maximum
amplitude. |
Subject(s):
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-Àrees temàtiques de la UPC::Enginyeria dels materials -Nickel -Níquel |
Rights:
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Document type:
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Article - Draft Article |
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