Crack growth in Fe-Si (2 wt%) single crystals on macroscopic and atomistic level

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F61388998%3A_____%2F19%3A00506915" target="_blank" >RIV/61388998:_____/19:00506915 - isvavai.cz</a>

Alternative codes found

RIV/68378271:_____/19:00506915 RIV/68407700:21230/19:00332287

Result on the web

<a href="https://www.sciencedirect.com/science/article/pii/S2211379719305492?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2211379719305492?via%3Dihub</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.rinp.2019.102450" target="_blank" >10.1016/j.rinp.2019.102450</a>

Result language

angličtina

Original language name

Crack growth in Fe-Si (2 wt%) single crystals on macroscopic and atomistic level

Original language description

This paper is dedicated to experimental and atomistic study of the influence of so called T-stress (acting along the crack plane) on fracture processes in bcc iron. We analyze experimental results from fracture tests performed at room temperature on bcc iron-silicon single crystals with a long edge crack (1¯10)[1 1 0] (crack plane/crack front). The specimens were loaded in tension mode I under different border conditions inducing different sign of the T-stress. The brittle-ductile behavior at the crack front was monitored on-line via optical microscopy together with external force and prolongation of the specimens. Topology of the specimens has been investigated before and after the fracture tests via the white light interferometer. The microscopic processes produced by the crack itself were studied at 300 K via 3D molecular dynamic (MD) simulations in bcc iron under equivalent boundary conditions and the T-stress was examined by means of stress calculations on the atomistic level. The experimental and atomistic results show that the sign of the T-stress affects the fracture behavior. MD simulations reveal that positive T-stress makes the emission of blunting dislocations 〈1 1 1〉{1 1 2} from the crack front more difficult. As a consequence, higher external loading is needed for crack blunting in the experimental specimens with T > 0 in comparison with the specimen having T < 0.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year

2019

Confidentiality

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Name of the periodical

Results in Physics

ISSN

2211-3797

e-ISSN

—

Volume of the periodical

14

Issue of the periodical within the volume

September

Country of publishing house

NL - THE KINGDOM OF THE NETHERLANDS

Number of pages

18

Pages from-to

102450

UT code for WoS article

000485104100122

EID of the result in the Scopus database

2-s2.0-85068471928