Investigation of the Ultrafine-Grained Structure Formation Under Different Strain Rates

• Autorzy: Kováčová A. , Kvačkaj T. , Bidulský R. , Bidulská J. , Kočiško R. , Dutkiewicz J. , Lityńska-Dobrzyńska L.

Identyfikatory

DOI

10.1515/amm-2017-0125

• Języki publikacji: EN

Abstrakty

EN

The present paper deals with a study on formation of specific substructural features in OFHC copper processed by equalchannel angular pressing (ECAP) considering different strain rate conditions. Since two mechanical tensile testing equipments were being used, strain rate response could be studied in a wide range (both in static and dynamic regimes). Moreover, the copper before tensile testing was subjected to drawing and ECAP, separately, which allows to study the influence of both structural and substructural features (CG vs. UFG structure). Considering the static regime, it was found that UFG materials have advanced properties, showing higher strength and ductility in comparison to their CG counterparts. However, this is valid only to the critical value of the strain rate. In the dynamic regime, mathematical linearized results imply that ultimate tensile strength in samples processed by ECAP increases twice every 10 s^-1 rising, however, they lost approximately the same plastic properties than samples after drawing. Differences in the progress of mechanical properties are related to specific structural and substructural features evolved in the material during ECAP processing. Above mentioned features were studied in detail by methods of transmission and scanning electron microscopy (TEM, SEM).

Słowa kluczowe

EN

electron microscopy; EBSD; nanostructured materials; equal channel angular processing; grain refinement

• Wydawca: Institute of Metallurgy and Materials Science of Polish Academy of Sciences ; Committee of Materials Engineering and Metallurgy of Polish Academy of Sciences
• Czasopismo: Archives of Metallurgy and Materials
• Rocznik: 2017
• Tom: Vol. 62, iss. 2A
• Strony: 851--856
• Opis fizyczny: Bibliogr. 56 poz., rys.

Twórcy

autor

Kováčová A.

• Department of Plastic Deformations and Simulations Processes, Technical University of Košice, Vysokoškolská 4, 042 00 Košice, Slovakia

autor

Kvačkaj T.

• Department of Plastic Deformations and Simulations Processes, Technical University of Košice, Vysokoškolská 4, 042 00 Košice, Slovakia

autor

Bidulský R.

• Department of Plastic Deformations and Simulations Processes, Technical University of Košice, Vysokoškolská 4, 042 00 Košice, Slovakia

autor

Bidulská J.

• Department of Plastic Deformations and Simulations Processes, Technical University of Košice, Vysokoškolská 4, 042 00 Košice, Slovakia

autor

Kočiško R.

• Department of Plastic Deformations and Simulations Processes, Technical University of Košice, Vysokoškolská 4, 042 00 Košice, Slovakia

autor

Dutkiewicz J.

• Institute of Metallurgy And Materials Science of The Polish Academy of Sciences, W. Reymonta 25, 30 059 Kraków, Poland

autor

Lityńska-Dobrzyńska L.

• Institute of Metallurgy And Materials Science of The Polish Academy of Sciences, W. Reymonta 25, 30 059 Kraków, Poland

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Uwagi

PL

Opracowanie ze środków MNiSW w ramach umowy 812/P-DUN/2016 na działalność upowszechniającą naukę (zadania 2017).