Microstructure evolution and strength response of ultrafine grain medium carbon steel processed by higher pressure

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F10%3A%230000218" target="_blank" >RIV/26316919:_____/10:#0000218 - isvavai.cz</a>

Výsledek na webu

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DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure evolution and strength response of ultrafine grain medium carbon steel processed by higher pressure

Popis výsledku v původním jazyce

High pressure torsion (HPT) deformation method at increased temperature of 400°C with varying strain was applied to refine ferrite-pearlite microstructure of the medium carbon steel (AISI 1045). The shear stress evolution during deformation and measurement of the torque were recorded and related to structure development and mechanical strength. The transmission electron microscopy (TEM) was employed to characterize microstructure development. Experienced lower strain the structure at disc periphery andin the disc centre showed the heterogeneity in ultrafine grain structure development. With further strain increase, equilibrium between the refinement of coarse phases and new grains restoration processes led to saturation of the grain refinement process. Upon tensile properties testing, the yield strength and ultimate strength increased with increasing equivalent strain (?eq) and only short region of strain hardening period prior failure appeared, regardless the strain applied.

Název v anglickém jazyce

Microstructure evolution and strength response of ultrafine grain medium carbon steel processed by higher pressure

Popis výsledku anglicky

High pressure torsion (HPT) deformation method at increased temperature of 400°C with varying strain was applied to refine ferrite-pearlite microstructure of the medium carbon steel (AISI 1045). The shear stress evolution during deformation and measurement of the torque were recorded and related to structure development and mechanical strength. The transmission electron microscopy (TEM) was employed to characterize microstructure development. Experienced lower strain the structure at disc periphery andin the disc centre showed the heterogeneity in ultrafine grain structure development. With further strain increase, equilibrium between the refinement of coarse phases and new grains restoration processes led to saturation of the grain refinement process. Upon tensile properties testing, the yield strength and ultimate strength increased with increasing equivalent strain (?eq) and only short region of strain hardening period prior failure appeared, regardless the strain applied.

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

JG - Hutnictví, kovové materiály

OECD FORD obor

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Projekt

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Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)

Rok uplatnění

2010

Kód důvěrnosti údajů

S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

Název periodika

Journal of Physics: Conference Series 240 (2010) 012131

ISSN

1742-6596

e-ISSN

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Svazek periodika

240

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

4

Strana od-do

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Kód UT WoS článku

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EID výsledku v databázi Scopus

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