Investigation of slip systems activity and grain boundary sliding in fine‑grained superplastic zinc alloy

• Autorzy: Bednarczyk Wiktor , Kawałko Jakub , Wątroba Maria , Szuwarzyński Michał , Bała Piotr
• Języki publikacji: EN

Abstrakty

EN

Zn alloys are desirable candidates for biodegradable materials due to their great biocompatibility and suffcient mechanical properties. Nevertheless, the most popular strengthening method by grain refinement after cold processing is usually ineffective in Zn alloys. Besides highly anisotropic deformation through a dislocation slip, grain boundary sliding (GBS) plays an important role in total deformation in fine-grained Zn alloys at room temperature (RT). Herein, Zn-0.5Cu (wt. %) alloy is fabricated by RT equal channel angular pressing, and its deformation mechanisms in tension were systematically analyzed at strain rates from 10^-4s^-1 to 10^o. GBS contribution in total deformation was measured using surface markers and atomic force microscopy. In addition, dislocation slip activity was evaluated via electron-backscattered diffraction-based slip trace analysis. As a result, investigated alloy presents the GBS contribution in a total deformation at RT from 35% at the strain rate [...]. Simultaneously, the number of slip-deformed grains decreased from 97.5% to 8%. Moreover, the basal slip system was dominant at all strain rates, while the prismatic and the pyramidal < c + a > slip systems were activated at the higher strain rates. The results presented here for the first time clearly show the complexity of deformation mechanisms in fine-grained Zn–0.5Cu, at significantly different strain rate conditions.

Słowa kluczowe

EN

Zinc alloys; grain-boundary sliding; slip trace analysis; slip activity; strain rate

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2023
• Tom: Vol. 23, no. 4
• Strony: art. e253, 1--11
• Opis fizyczny: Bibliogr. 34 poz., il., rys., wykr.

Twórcy

autor

Bednarczyk Wiktor

• Warsaw University of Technology, Warsaw, Poland

• https://orcid.org/0000-0003-0001-1693

autor

Kawałko Jakub

• Academic Centre for Materials and Nanotechnology, AGH, Krakow, Poland

autor

Wątroba Maria

• Laboratory of Mechanics of Materials and Nanostructures, Thun, Switzerland

autor

Szuwarzyński Michał

• Academic Centre for Materials and Nanotechnology, AGH, Krakow, Poland

autor

Bała Piotr

• Academic Centre for Materials and Nanotechnology, AGH, Krakow, Poland
• Faculty of Metals Engineering and Industrial Computer Science, AGH Krakow, Poland

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