Microstructure evolution in the context of fracture in austenitic steels under complex loads at cryogenic temperatures
Authors:
- Kinga Nalepka,
- Błażej Skoczeń,
- Rafał Schmidt,
- Marlena Ciepielowska,
- Elwira Schmidt,
- Robert Chulist
Abstract
The microstructure evolution and its coupling with fracture under complex load conditions at the temperature of liquid helium are investigated. Tension combined with torsion was applied to thin-walled cylindrical samples made of AISI 304 steel. The second component load is the key. The torque causes the sample to buckle, and the resulting folds and wells differentiate the conditions in which the transformation occurs. The feritoscopic examinations combined with the profilometer surface characterization revealed that martensite initiates in the slopes of elevations, where the highest shear stresses arise. The secondary phase has a special cross-lamellar microstructure, uncovered in detailed studies using the electron backscatter diffraction (EBSD) method and synchrotron X-ray diffraction. The new phase prefers the transverse direction of the cylinder surface, which remains invariant during torsion. Along it, the martensite grain develops, which then twins so as to continue growing along the second plane of the maximum shear stresses. In the advanced stage of the phase transformation, the resulting martensite has compact microstructure able to block fracture propagation and to deflect its path. The macrocrack trajectory and the secondary phase distribution coupled with it were reconstructed with high accuracy in the extended finite element method (XFEM) simulation.
- Record ID
- CUT450de784ea22458da381b9c8096dcc2c
- Publication categories
- ;
- Author
- Journal series
- Materials Characterization, ISSN 1044-5803, e-ISSN 1873-4189
- Issue year
- 2023
- Vol
- 197
- Pages
- [1-17]
- Article number
- 112654
- Other elements of collation
- rys.; schem.; tab.; wykr.; Bibliografia (na s.) - 16-17; Bibliografia (liczba pozycji) - 40; Oznaczenie streszczenia - Abstr.; Numeracja w czasopiśmie - Vol. 197
- Keywords in English
- cryogenic temperatures, fracture, fcc-bcc transformation, electron backscatter diffraction, XFEM simulation
- ASJC Classification
- ; ; ;
- DOI
- DOI:10.1016/j.matchar.2023.112654 Opening in a new tab
- URL
- https://www.sciencedirect.com/science/article/pii/S1044580323000116 Opening in a new tab
- Related project
- Wieloskalowy model mechanizmów pękania materiałów niejednorodnych w warunkach obciążeń złożonych w ekstremalnie niskich temperaturach. . Project leader at PK: , ,
Projects financed by NSC [Projekty finansowane przez NCN] - Droga do Doskonałości - kompleksowy program wsparcia uczelni. . Project leader at PK: , ,
- Wieloskalowy model mechanizmów pękania materiałów niejednorodnych w warunkach obciążeń złożonych w ekstremalnie niskich temperaturach. . Project leader at PK: , ,
- Language
- eng (en) English
- License
- Score (nominal)
- 100
- Score source
- journalList
- Score
- Publication indicators
- Additional fields
- Indeksowana w: Scopus
- Uniform Resource Identifier
- https://cris.pk.edu.pl/info/article/CUT450de784ea22458da381b9c8096dcc2c/
- URN
urn:pkr-prod:CUT450de784ea22458da381b9c8096dcc2c
* presented citation count is obtained through Internet information analysis, and it is close to the number calculated by the Publish or PerishOpening in a new tab system.