Microstructural Changes of the Nanostructured Bainitic Steel Induced by Quasi-Static and Dynamic Deformation
PBN-AR
Instytucja
Sieć Badawcza Łukasiewicz - Instytut Metalurgii Żelaza im. Stanisława Staszica
Informacje podstawowe
Główny język publikacji
en
Czasopismo
ARCHIVES OF METALLURGY AND MATERIALS (30pkt w roku publikacji)
ISSN
1733-3490
EISSN
Wydawca
POLISH ACAD SCIENCES COMMITTEE METALLURGY and INSTITUTE OF METALLURGY AND MATERIALS SCIENCE
DOI
Rok publikacji
2017
Numer zeszytu
4
Strony od-do
2317-2329
Numer tomu
62
Identyfikator DOI
Liczba arkuszy
0,60
Autorzy
Pozostali autorzy
+ 2
Słowa kluczowe
en
nanostructured bainitic steel
dynamic deformation
adiabatic shear bands
transmission electron microscopy
Streszczenia
Język
en
Treść
Changes in the microstructure of nanostructured bainitic steel induced by quasi-static and dynamic deformation have been shown in the article. The method of deformation and strain rate have important impact on the microstructure changes especially due to strain localization. Microstructure of nanostructured steel Fe-0.6%C-1.9Mn-1.8Si-1.3Cr-0.7Mo consists of nanometer size carbide-free bainite laths and 20-30% volume fraction of retained austenite. Quasi-static and dynamic (strain rate up to 2×102 s–1) compression tests were realized using Gleeble simulator. Dynamic deformation at the strain rate up to 9×103 s–1 was realized by the Split Hopkinson Pressure Bar method (SHPB). Moreover high energy firing tests of plates made of the nanostructured bainitic steel were carried out to produce dynamically deformed material for investigation. Adiabatic shear bands were found as a result of localization of deformation in dynamic compression tests and in firing tests. Microstructure of the bands was examined and hardness changes in the vicinity of the bands were determined. The TEM examination of the ASBs showed the change from the internal shear band structure to the matrix structure to be gradual. This study clearly resolved that the interior (core) of the band has an extremely fine grained structure with grain diameter ranging from 100 nm to 200 nm. Martensitic twins were found within the grains. No austenite and carbide reflections were detected in the diffraction patterns taken from the core of the band. Hardness of the core of the ASBs for examined variants of isothermal heat treatment was higher about 300 HV referring to steel matrix hardness.
Cechy publikacji
Inżynieria materiałowa
Metalurgia
Materials science
Metallurgy
discipline:Inżynieria materiałowa
discipline:Inżynieria produkcji
discipline:Mechanika
discipline:Materials science
discipline:Production engineering
discipline:Mechanics
Original article
Original article presents the results of original research or experiment.
Oryginalny artykuł naukowy
Oryginalny artykuł naukowy przedstawia rezultaty oryginalnych badań naukowych lub eksperymentu.
Inne
System-identifier
PBN-R:862274
CrossrefMetadata from Crossref logo
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