Crystal Lattice Rotations Induced by Shear Banding in fcc Metals Deformed at High Strain Rates

• Autorzy: Mania Izabela , Paul Henryk , Chulist Robert , Petrzak Paweł , Miszczyk Magdalena , Prażmowski Mariusz

Identyfikatory

DOI

10.24425/amm.2023.141508

• Języki publikacji: EN

Abstrakty

EN

In this paper, the microstructural and texture changes in polycrystalline CuZn30 alloy, copper, and AA1050 aluminium alloy have been studied to describe the crystal lattice rotation during shear bands formation. The hat-shaped specimens were deformed using a drop-hammer at the strain rate of 560 s^-1. Microstructure evolution was investigated using optical microscopy, whereas texture changes were examined with the use of a scanning electron microscope equipped with the EBSD facility. The microstructural observations were correlated with nanohardness measurements to evaluate the mechanical properties of the sheared regions. The analyses demonstrate the gradual nature of the shear banding process, which can be described as a mechanism of the bands nucleation and then successive growth rather than as an abrupt instability. It was found that regardless of the initial orientation of the grains inside the sheared region, a well-defined tendency of the crystal lattice rotation is observed. This rotation mechanism leads to the formation of specific texture components of the sheared region, different from the one observed in a weakly or non-deformed matrix. During the process of rotation, one of the {111} planes in each grain of the sheared region ‘tends’ to overlap with the plane of maximum shear stresses and one of the <110> or <112> directions align with the shear direction. This allows slip propagation through the boundaries between adjacent grains without apparent change in the shear direction. Finally, in order to trace the rotation path, transforming the matrix texture components into shear band, rotation axis and angles were identified.

Słowa kluczowe

EN

shear bands; high strain rates; texture; SEM/EBSD

• 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: 2023
• Tom: Vol. 68, iss. 1
• Strony: 319--329
• Opis fizyczny: Bibliogr. 30 poz., fot., rys.

Twórcy

autor

Mania Izabela

• Polish Academy of Sciences, Institute of Metallurgy and Materials Science, 25 Reymonta Str., 30-059 Krakow, Poland

• https://orcid.org/0000-0002-9087-2114

autor

Paul Henryk

• Polish Academy of Sciences, Institute of Metallurgy and Materials Science, 25 Reymonta Str., 30-059 Krakow, Poland

• https://orcid.org/0000-0003-4107-982X

autor

Chulist Robert

• Polish Academy of Sciences, Institute of Metallurgy and Materials Science, 25 Reymonta Str., 30-059 Krakow, Poland

• https://orcid.org/0000-0001-6680-9636

autor

Petrzak Paweł

• Polish Academy of Sciences, Institute of Metallurgy and Materials Science, 25 Reymonta Str., 30-059 Krakow, Poland

• https://orcid.org/0000-0001-8981-1480

autor

Miszczyk Magdalena

• Polish Academy of Sciences, Institute of Metallurgy and Materials Science, 25 Reymonta Str., 30-059 Krakow, Poland

• https://orcid.org/0000-0003-0206-4983

autor

Prażmowski Mariusz

• Opole University of Technology, Faculty of Mechanics, 76 Prószkowska Str., 45-758 Opole, Poland

• https://orcid.org/0000-0002-9779-9028

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Uwagi

1. This research was supported by the Polish National Centre of Science (NCN) within project no.: UMO-2018/31/B/ST8/00942 (Opus).

2. Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023).