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The effect of microstructure anisotropy on low temperature fracture of ultrafine-grained iron

Romelczyk-Baishya, Barbara / Łęczycki, Krzysztof / Płocińska, Magdalena / Kulczyk, Mariusz / Molak, Rafał / Pakieła, Zbigniew

This papers deals with the character on low (−180 °C) temperature fracture of iron. Microcrystalline and ultrafine-grained (UFG) iron rods were investigated. To obtain UFG material 20 mm in diameter iron rod was hydrostatically extruded (HE) in two steps: from 20 to 12 mm and from 12 to 8 mm. Because of microstructure anisotropy caused by HE mini-disc and mini-beam samples were cut off from perpendicular and longitudinal cross-section of the rods. Microcrystalline rod fractured in brittle manner at low temperature for both cross-sections, but in UFG iron fracture character depended on grain’s shape. For samples were crack propagates parallel to the grain’s elongation axis intercrystalline fracture occurred. For mini-beams were crack propagates crosswise to the grain elongation axis transcrystalline fracture occurred and force deflection curve was similar to those obtained for room temperature.

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The effect of microstructure anisotropy on low temperature fracture of ultrafine-grained iron

Romelczyk-Baishya, Barbara / Łęczycki, Krzysztof / Płocińska, Magdalena / Kulczyk, Mariusz / Molak, Rafał / Pakieła, Zbigniew

This papers deals with the character on low (−180 °C) temperature fracture of iron. Microcrystalline and ultrafine-grained (UFG) iron rods were investigated. To obtain UFG material 20 mm in diameter iron rod was hydrostatically extruded (HE) in two steps: from 20 to 12 mm and from 12 to 8 mm. Because of microstructure anisotropy caused by HE mini-disc and mini-beam samples were cut off from perpendicular and longitudinal cross-section of the rods. Microcrystalline rod fractured in brittle manner at low temperature for both cross-sections, but in UFG iron fracture character depended on grain’s shape. For samples were crack propagates parallel to the grain’s elongation axis intercrystalline fracture occurred. For mini-beams were crack propagates crosswise to the grain elongation axis transcrystalline fracture occurred and force deflection curve was similar to those obtained for room temperature.

The effect of microstructure anisotropy on low temperature fracture of ultrafine-grained iron

Romelczyk-Baishya, Barbara / Łęczycki, Krzysztof / Płocińska, Magdalena / Kulczyk, Mariusz / Molak, Rafał / Pakieła, Zbigniew

This papers deals with the character on low (−180 °C) temperature fracture of iron. Microcrystalline and ultrafine-grained (UFG) iron rods were investigated. To obtain UFG material 20 mm in diameter iron rod was hydrostatically extruded (HE) in two steps: from 20 to 12 mm and from 12 to 8 mm. Because of microstructure anisotropy caused by HE mini-disc and mini-beam samples were cut off from perpendicular and longitudinal cross-section of the rods. Microcrystalline rod fractured in brittle manner at low temperature for both cross-sections, but in UFG iron fracture character depended on grain’s shape. For samples were crack propagates parallel to the grain’s elongation axis intercrystalline fracture occurred. For mini-beams were crack propagates crosswise to the grain elongation axis transcrystalline fracture occurred and force deflection curve was similar to those obtained for room temperature.

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Title:

The effect of microstructure anisotropy on low temperature fracture of ultrafine-grained iron

Additional title:

Archiv.Civ.Mech.Eng

Contributors:

Romelczyk-Baishya, Barbara (author) / Łęczycki, Krzysztof (author) / Płocińska, Magdalena (author) / Kulczyk, Mariusz (author) / Molak, Rafał (author) / Pakieła, Zbigniew (author)

Published in:

Archives of Civil and Mechanical Engineering ; 18 ; 1166-1182

Publication date:

2018-12-01

Size:

17 pages

ISSN:

DOI:

https://doi.org/10.1016/j.acme.2018.02.014

Type of media:

Article (Journal)

Type of material:

Electronic Resource

Language:

English

Keywords:

Iron , Nanomaterial , Fracture , Low temperature , Small punch test Engineering , Civil Engineering , Mechanical Engineering , Structural Materials

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