Evolution of stress fields during crack growth and arrest in a brittle-ductile CrN-Cr clamped-cantilever analysed by X-ray nanodiffraction and modelling

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Evolution of stress fields during crack growth and arrest in a brittle-ductile CrN-Cr clamped-cantilever analysed by X-ray nanodiffraction and modelling. / Meindlhumer, Michael; Brandt, L.R.; Zalesak, Jakub et al.
in: Materials and Design, Jahrgang 2021, Nr. 198, 109365, 28.11.2020.

Publikationen: Beitrag in FachzeitschriftArtikelForschung(peer-reviewed)

APA

Meindlhumer, M., Brandt, L. R., Zalesak, J., Rosenthal, M., Hruby, H., Kopecek, J., Salvati, E., Mitterer, C., Daniel, R., Todt, J., Keckes, J., & Korsunsky, A. M. (2020). Evolution of stress fields during crack growth and arrest in a brittle-ductile CrN-Cr clamped-cantilever analysed by X-ray nanodiffraction and modelling. Materials and Design, 2021(198), Artikel 109365. Vorzeitige Online-Publikation. https://doi.org/10.1016/j.matdes.2020.109365

Vancouver

Meindlhumer M, Brandt LR, Zalesak J, Rosenthal M, Hruby H, Kopecek J et al. Evolution of stress fields during crack growth and arrest in a brittle-ductile CrN-Cr clamped-cantilever analysed by X-ray nanodiffraction and modelling. Materials and Design. 2020 Nov 28;2021(198):109365. Epub 2020 Nov 28. doi: 10.1016/j.matdes.2020.109365

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@article{c3fb299a5a7e482aa9d3aea48f5f1555,
title = "Evolution of stress fields during crack growth and arrest in a brittle-ductile CrN-Cr clamped-cantilever analysed by X-ray nanodiffraction and modelling",
abstract = "In order to understand the fracture resistance of nanocrystalline thin films, it is necessary to assess nanoscopic multiaxial stress fields accompanying crack growth during irreversible deformation. Here, a clamped cantilever with dimensions of 200 × 23.7 × 40 μm 3 was machined by focused ion beam milling from a thin film composed of four alternating CrN and Cr layers. The cantilever was loaded to 460 mN in two steps and multiaxial strain distributions were determined by in situ cross-sectional X-ray nanodiffraction. Characterization in as-deposited state revealed the depth variation of fibre texture and residual stress across the layers. The in situ experiment indicated a strong influence of the residual stresses on the cross-sectional stress fields evolution and crack arrest capability at the CrN-Cr interface. In detail, an effective negative stress intensity of −5.9 ± 0.4 MPa m ½ arose as a consequence of the residual stress state. Crack growth in the notched Cr layer occurred at a critical stress intensity of 2.8 ± 0.5 MPa m ½. The results were complemented by two-dimensional numerical simulation to gain further insight into the elastic-plastic deformation evolution. The quantitative experimental and modelling results elucidate the stepwise nature of fracture advancement across the alternating brittle and ductile layers and their interfaces. ",
author = "Michael Meindlhumer and L.R. Brandt and Jakub Zalesak and M. Rosenthal and Hynek Hruby and J. Kopecek and E. Salvati and Christian Mitterer and Rostislav Daniel and Juraj Todt and Jozef Keckes and Korsunsky, {Alexander M.}",
year = "2020",
month = nov,
day = "28",
doi = "10.1016/j.matdes.2020.109365",
language = "English",
volume = "2021",
journal = "Materials and Design",
issn = "0264-1275",
publisher = "Elsevier",
number = "198",

}

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TY - JOUR

T1 - Evolution of stress fields during crack growth and arrest in a brittle-ductile CrN-Cr clamped-cantilever analysed by X-ray nanodiffraction and modelling

AU - Meindlhumer, Michael

AU - Brandt, L.R.

AU - Zalesak, Jakub

AU - Rosenthal, M.

AU - Hruby, Hynek

AU - Kopecek, J.

AU - Salvati, E.

AU - Mitterer, Christian

AU - Daniel, Rostislav

AU - Todt, Juraj

AU - Keckes, Jozef

AU - Korsunsky, Alexander M.

PY - 2020/11/28

Y1 - 2020/11/28

N2 - In order to understand the fracture resistance of nanocrystalline thin films, it is necessary to assess nanoscopic multiaxial stress fields accompanying crack growth during irreversible deformation. Here, a clamped cantilever with dimensions of 200 × 23.7 × 40 μm 3 was machined by focused ion beam milling from a thin film composed of four alternating CrN and Cr layers. The cantilever was loaded to 460 mN in two steps and multiaxial strain distributions were determined by in situ cross-sectional X-ray nanodiffraction. Characterization in as-deposited state revealed the depth variation of fibre texture and residual stress across the layers. The in situ experiment indicated a strong influence of the residual stresses on the cross-sectional stress fields evolution and crack arrest capability at the CrN-Cr interface. In detail, an effective negative stress intensity of −5.9 ± 0.4 MPa m ½ arose as a consequence of the residual stress state. Crack growth in the notched Cr layer occurred at a critical stress intensity of 2.8 ± 0.5 MPa m ½. The results were complemented by two-dimensional numerical simulation to gain further insight into the elastic-plastic deformation evolution. The quantitative experimental and modelling results elucidate the stepwise nature of fracture advancement across the alternating brittle and ductile layers and their interfaces.

AB - In order to understand the fracture resistance of nanocrystalline thin films, it is necessary to assess nanoscopic multiaxial stress fields accompanying crack growth during irreversible deformation. Here, a clamped cantilever with dimensions of 200 × 23.7 × 40 μm 3 was machined by focused ion beam milling from a thin film composed of four alternating CrN and Cr layers. The cantilever was loaded to 460 mN in two steps and multiaxial strain distributions were determined by in situ cross-sectional X-ray nanodiffraction. Characterization in as-deposited state revealed the depth variation of fibre texture and residual stress across the layers. The in situ experiment indicated a strong influence of the residual stresses on the cross-sectional stress fields evolution and crack arrest capability at the CrN-Cr interface. In detail, an effective negative stress intensity of −5.9 ± 0.4 MPa m ½ arose as a consequence of the residual stress state. Crack growth in the notched Cr layer occurred at a critical stress intensity of 2.8 ± 0.5 MPa m ½. The results were complemented by two-dimensional numerical simulation to gain further insight into the elastic-plastic deformation evolution. The quantitative experimental and modelling results elucidate the stepwise nature of fracture advancement across the alternating brittle and ductile layers and their interfaces.

UR - http://www.scopus.com/inward/record.url?scp=85097236081&partnerID=8YFLogxK

U2 - 10.1016/j.matdes.2020.109365

DO - 10.1016/j.matdes.2020.109365

M3 - Article

VL - 2021

JO - Materials and Design

JF - Materials and Design

SN - 0264-1275

IS - 198

M1 - 109365

ER -