TY - GEN
T1 - Microstructure refinement in martensitic creep resistant steel via severe plastic deformation
AU - Kral, Petr
AU - Dvorak, Jiri
AU - Sklenicka, Vaclav
AU - Takizawaa, Yoichi
AU - Masuda, Takahiro
AU - Horita, Zenji
AU - Kucharova, Kveta
AU - Kvapilova, Marie
AU - Svobodova, Marie
N1 - Funding Information:
We acknowledge the financial support provided by the Czech Science Foundation under the project no. 16-09518S. This work was also supported by a Grant-in-Aid from the MEXT, Japan, for Scientific Research (S) (No.26220909). The HPT process was carried out in the International Research Center on Giant Straining for Advanced Materials (IRC-GSAM) at Kyushu University, Japan.
Publisher Copyright:
© NANOCON 2018 - Conference Proceedings, 10th Anniversary International Conference on Nanomaterials - Research and Application. All rights reserved.
PY - 2019
Y1 - 2019
N2 - In this study, the effect of severe plastic deformation on grain size refinement and mechanical properties of a coarse-grained steel was investigated. The experimental material used in the present investigation was advanced tungsten modified 9 %Cr P92 steel. The coarse-grained state of P92 steel was deformed at room temperature by high-pressure sliding or high-pressure torsion. The microstructure was investigated using Tescan Lyra 3 scanning electron microscope equipped with an electron-back scatter unit. Severe plastic deformation at room temperature led to grain size reduction down to sub-microscopic level. The grain size and hardness exhibited significant changes to the equivalent strain of about 10, and slight changes between the equivalent strains of 10-20. Equivalent plastic strains higher than 20 only led to insignificant changes in the mean grain size and hardness. The creep behaviour of the ultrafine-grained state exhibited the minimum creep rate of about two orders of magnitude greater when compared to the coarse-grained P92 steel.
AB - In this study, the effect of severe plastic deformation on grain size refinement and mechanical properties of a coarse-grained steel was investigated. The experimental material used in the present investigation was advanced tungsten modified 9 %Cr P92 steel. The coarse-grained state of P92 steel was deformed at room temperature by high-pressure sliding or high-pressure torsion. The microstructure was investigated using Tescan Lyra 3 scanning electron microscope equipped with an electron-back scatter unit. Severe plastic deformation at room temperature led to grain size reduction down to sub-microscopic level. The grain size and hardness exhibited significant changes to the equivalent strain of about 10, and slight changes between the equivalent strains of 10-20. Equivalent plastic strains higher than 20 only led to insignificant changes in the mean grain size and hardness. The creep behaviour of the ultrafine-grained state exhibited the minimum creep rate of about two orders of magnitude greater when compared to the coarse-grained P92 steel.
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M3 - Conference contribution
AN - SCOPUS:85062991688
T3 - NANOCON 2018 - Conference Proceedings, 10th Anniversary International Conference on Nanomaterials - Research and Application
SP - 597
EP - 602
BT - NANOCON 2018 - Conference Proceedings, 10th Anniversary International Conference on Nanomaterials - Research and Application
PB - TANGER Ltd.
T2 - 10th Anniversary International Conference on Nanomaterials - Research and Application, NANOCON 2018
Y2 - 17 October 2018 through 19 October 2018
ER -