Temperature dependence of tensile deformation behavior and strain hardening of lean duplex stainless steels

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F22%3A10454452" target="_blank" >RIV/00216208:11320/22:10454452 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=G-57r61yDe" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=G-57r61yDe</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmrt.2022.07.040" target="_blank" >10.1016/j.jmrt.2022.07.040</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Temperature dependence of tensile deformation behavior and strain hardening of lean duplex stainless steels

Popis výsledku v původním jazyce

Two lean duplex stainless steels with different manganese contents (4 and 8 wt.%) were deformed in the tensile mode in the temperature range of 25-300 degrees C. The deformation-induced martensitic transformation was characterized as the main austenite deformation mechanism of 4Mn steel at room temperature. In contrast, the strain hardening behavior of 8Mn steel was regulated by the cooperation of twinning induced plasticity and transformation induced plasticity. This was justified considering the lower austenite fraction and austenite stability in 4Mn compared to the steel containing a higher manganese content. Mechanical properties such as ultimate tensile strength and uniform elongation in both steels were significantly changed as the deformation temperature was increased. Differences in chemical composition and deformation temperature led to changing deformation mode due to strain partitioning between austenite and ferrite, austenite stability, and stacking fault energy. The most important factors influencing the mechanical properties are austenite stability and stacking fault energy at elevated temperatures. It was observed that as the austenite stability increases, martensitic transformation occurs directly from austenite grain and annealing twin boundaries but does not significantly improve strength and ductility. The strain partitioning between austenite and ferrite could provide a proper condition for strain-induced martensite transformation and deformation twinning, thereby enhanced mechanical properties at elevated temperatures. (C) 2022 The Author(s). Published by Elsevier B.V.

Název v anglickém jazyce

Temperature dependence of tensile deformation behavior and strain hardening of lean duplex stainless steels

Popis výsledku anglicky

Two lean duplex stainless steels with different manganese contents (4 and 8 wt.%) were deformed in the tensile mode in the temperature range of 25-300 degrees C. The deformation-induced martensitic transformation was characterized as the main austenite deformation mechanism of 4Mn steel at room temperature. In contrast, the strain hardening behavior of 8Mn steel was regulated by the cooperation of twinning induced plasticity and transformation induced plasticity. This was justified considering the lower austenite fraction and austenite stability in 4Mn compared to the steel containing a higher manganese content. Mechanical properties such as ultimate tensile strength and uniform elongation in both steels were significantly changed as the deformation temperature was increased. Differences in chemical composition and deformation temperature led to changing deformation mode due to strain partitioning between austenite and ferrite, austenite stability, and stacking fault energy. The most important factors influencing the mechanical properties are austenite stability and stacking fault energy at elevated temperatures. It was observed that as the austenite stability increases, martensitic transformation occurs directly from austenite grain and annealing twin boundaries but does not significantly improve strength and ductility. The strain partitioning between austenite and ferrite could provide a proper condition for strain-induced martensite transformation and deformation twinning, thereby enhanced mechanical properties at elevated temperatures. (C) 2022 The Author(s). Published by Elsevier B.V.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Projekt

<a href="/cs/project/EF15_003%2F0000485" target="_blank" >EF15_003/0000485: Centrum nanomateriálů pro pokročilé aplikace</a><br>

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2022

Kód důvěrnosti údajů

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

Název periodika

Journal of Materials Research and Technology

ISSN

2238-7854

e-ISSN

2214-0697

Svazek periodika

20

Číslo periodika v rámci svazku

20

Stát vydavatele periodika

BR - Brazilská federativní republika

Počet stran výsledku

13

Strana od-do

330-342

Kód UT WoS článku

000878447700003

EID výsledku v databázi Scopus

2-s2.0-85137343026