Effects of grains' morphology on strengthening mechanisms in ODM401 14Cr ODS steel at high temperatures

Šiška, Filip; Hadraba, Hynek; Stratil, Luděk; Fintová, Stanislava; Kuběna, Ivo

doi:https://dx.doi.org/10.1016/j.msea.2022.143663

Number of the records: 1

Effects of grains' morphology on strengthening mechanisms in ODM401 14Cr ODS steel at high temperatures

1.

SYSNO ASEP	0560423
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Effects of grains' morphology on strengthening mechanisms in ODM401 14Cr ODS steel at high temperatures
Author(s)	Šiška, Filip (UFM-A)_{RID, ORCID} Hadraba, Hynek (UFM-A)_{RID, ORCID} Stratil, Luděk (UFM-A)_ORCID Fintová, Stanislava (UFM-A)_ORCID Kuběna, Ivo (UFM-A)_{RID, ORCID}
Number of authors	5
Article number	143663
Source Title	Materials Science and Engineering A Structural Materials Properties Microstructure and Processing. - : Elsevier - ISSN 0921-5093 Roč. 852, SEP (2022)
Number of pages	11 s.
Language	eng - English
Country	CH - Switzerland
Keywords	ODS steel ; Stress relaxation ; Plasticity ; Grain boundary creep
Subject RIV	JG - Metallurgy
OECD category	Materials engineering
R&D Projects	GA20-20873S GA ČR - Czech Science Foundation (CSF)
Method of publishing	Limited access
Institutional support	UFM-A - RVO:68081723
UT WOS	000842991400004
EID SCOPUS	85136092305
DOI	10.1016/j.msea.2022.143663
Annotation	The effect of grain orientation on the mechanical behavior of the 14Cr ODS steel (ODM401) at temperatures 400-800 ?C is analyzed. The tensile and stress relaxation tests are performed on tensile specimens with grain orientation parallel and perpendicular to the extrusion direction. The strengthening mechanisms are analyzed in terms of the internal and thermal stress component, dislocation glide and climb and grain boundary creep. Models of strengthening mechanisms are used for evaluation of their intensity for a given temperature, grain orientation and macroscopic plastic strain level (0.001, 0.01, 0.025). Both grain orientations provide similar strengthening up to 600 ?C. The grain orientation parallel to the extrusion direction provides higher strength at temperatures 700-800 ?C due to the reduced grain boundary creep and dislocations annihilation at grain boundaries.
Workplace	Institute of Physics of Materials
Contact	Yvonna Šrámková, sramkova@ipm.cz, Tel.: 532 290 485
Year of Publishing	2023
Electronic address	https://www.sciencedirect.com/science/article/pii/S0921509322010474?via%3Dihub

Number of the records: 1