Detail publikace

Plastic deformation of magnetically isotropic Cr single crystals compressed at 77 K

HOLZER, J. KRUML, T. GRÖGER, R. CHLUP, Z.

Originální název

Plastic deformation of magnetically isotropic Cr single crystals compressed at 77 K

Typ

článek v časopise ve Web of Science, Jimp

Jazyk

angličtina

Originální abstrakt

A series of compression tests at 77 K was carried out on chromium single crystals in magnetically isotropic state to investigate the slip activity during the first 2-4% of plastic strain. Macroscopic samples of 3 mm thickness were polished mechanically and electrolytically and their orientations determined before and after deformation by electron backscatter diffraction to assess the magnitudes and directions of crystal rotations. The crystals compressed in the direction close to [001] deformed primarily by slip on the most highly stressed (101)[111] and (101)[111] systems. Loading the crystals in the directions close to the [011] [111] edge of the stereographic triangle resulted in preferential twinning on {112}111 systems. For loading in the center-triangle region, diffraction contrast imaging in TEM reveals the presence of [100] screw junctions between intersecting 1/2[111] and 1/2 [111] screw dislocations. Using molecular statics simulations, we show that this junction does not break under the applied stress and moves together with the two dislocations on their common (011) plane. In contrast to the prediction of the Schmid law, the slip morphology for center-triangle orientations is thus dominated by anomalous slip on the low stressed (011) plane.

Klíčová slova

Chromium; Anomalous slip; TEM; Atomistic simulations; 77 K

Autoři

HOLZER, J.; KRUML, T.; GRÖGER, R.; CHLUP, Z.

Vydáno

1. 3. 2021

Nakladatel

PERGAMON-ELSEVIER SCIENCE LTD

Místo

OXFORD

ISSN

1879-2154

Periodikum

INTERNATIONAL JOURNAL OF PLASTICITY

Ročník

138

Číslo

102938

Stát

Spojené království Velké Británie a Severního Irska

Strany od

102938

Strany do

102956

Strany počet

19

URL

https://www.sciencedirect.com/science/article/pii/S0749641921000139

BibTex

@article{BUT180087,
  author="Jakub {Holzer} and Tomáš {Kruml} and Roman {Gröger} and Zdeněk {Chlup}",
  title="Plastic deformation of magnetically isotropic Cr single crystals compressed at 77 K",
  journal="INTERNATIONAL JOURNAL OF PLASTICITY",
  year="2021",
  volume="138",
  number="102938",
  pages="19",
  doi="10.1016/j.ijplas.2021.102938",
  issn="1879-2154",
  url="https://www.sciencedirect.com/science/article/pii/S0749641921000139"
}