The effect of microstructure anisotropy on low temperature fracture of ultrafine-grained iron
Barbara Romelczyk-Baishya , Krzysztof Łęczycki , Magdalena Płocińska , Mariusz Kulczyk , Rafał Molak , Zbigniew Pakieła
AbstractThis 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.
|Journal series||Archives of Civil and Mechanical Engineering, ISSN 1644-9665, (A 30 pkt)|
|Publication size in sheets||0.8|
|Keywords in Polish||Żelazo, nanomateriały, pękanie, obniżona temperatura, zginanie zminiaturyzowanych próbek|
|Keywords in English||Iron, Nanomaterials, Fracture, Low temperature, Small punch test|
|Score|| = 30.0, ArticleFromJournal|
= 30.0, ArticleFromJournal
|Publication indicators||: 2016 = 1.935; : 2017 = 2.763 (2) - 2017=2.562 (5)|
|Citation count*||2 (2019-03-31)|
* presented citation count is obtained through Internet information analysis and it is close to the number calculated by the Publish or Perish system.