Analysis of Strain Hardening Stages of AISI 316 LN Stainless Steel Under Cold Rolling Conditions

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26722445%3A_____%2F25%3AN0000022" target="_blank" >RIV/26722445:_____/25:N0000022 - isvavai.cz</a>

Výsledek na webu

<a href="https://www.mdpi.com/2075-4701/15/10/1060" target="_blank" >https://www.mdpi.com/2075-4701/15/10/1060</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.3390/met15101060" target="_blank" >10.3390/met15101060</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Analysis of Strain Hardening Stages of AISI 316 LN Stainless Steel Under Cold Rolling Conditions

Popis výsledku v původním jazyce

In the present investigation, stress-strain curves and strain hardening rates on samples rolled at ambient temperature with thickness reductions of 0%, 10%, 30%, and 50% were studied. On the processed samples, static tensile tests at ambient temperature were performed. Transformation of the engineering stress-strain curves to true stress-strain curves and their numerical processing by first derivation (theta = d sigma/d epsilon) was carried out. Dependencies theta = f(epsilon(T)) characterizing the strain hardening rates were derived. From the curves and the true stress-strain and strain hardening rates, the three stages describing different rates of strain hardening were identified. A rapid increase in true stress and a rapid decrease in the strain hardening rate in Stage I were observed. Quasi-linear dependencies with an increase in true stress but with a slow, gradual decline in the strain hardening rate in Stage II were obtained. Slowly increasing true strains, accompanied by a decrease in strain hardening rates and their transition to softening, led to the formation of plastic instability and necking in Stage III. The endpoints of the strain hardening rate depending on the cold rolling deformations lie in the following intervals: theta(Stage I) is an element of <1904;3032> MPa, theta(Stage II) is an element of <906;-873> MPa, theta(Stage III) is an element of <-144;-11,979> MPa. While in Stage I and Stage II, the plastic deformation mechanism is predominantly dislocation slip, in Stage III, the plastic deformation mechanism is twinning accompanied by dislocation slip.

Název v anglickém jazyce

Analysis of Strain Hardening Stages of AISI 316 LN Stainless Steel Under Cold Rolling Conditions

Popis výsledku anglicky

In the present investigation, stress-strain curves and strain hardening rates on samples rolled at ambient temperature with thickness reductions of 0%, 10%, 30%, and 50% were studied. On the processed samples, static tensile tests at ambient temperature were performed. Transformation of the engineering stress-strain curves to true stress-strain curves and their numerical processing by first derivation (theta = d sigma/d epsilon) was carried out. Dependencies theta = f(epsilon(T)) characterizing the strain hardening rates were derived. From the curves and the true stress-strain and strain hardening rates, the three stages describing different rates of strain hardening were identified. A rapid increase in true stress and a rapid decrease in the strain hardening rate in Stage I were observed. Quasi-linear dependencies with an increase in true stress but with a slow, gradual decline in the strain hardening rate in Stage II were obtained. Slowly increasing true strains, accompanied by a decrease in strain hardening rates and their transition to softening, led to the formation of plastic instability and necking in Stage III. The endpoints of the strain hardening rate depending on the cold rolling deformations lie in the following intervals: theta(Stage I) is an element of <1904;3032> MPa, theta(Stage II) is an element of <906;-873> MPa, theta(Stage III) is an element of <-144;-11,979> MPa. While in Stage I and Stage II, the plastic deformation mechanism is predominantly dislocation slip, in Stage III, the plastic deformation mechanism is twinning accompanied by dislocation slip.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

—

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2025

Kód důvěrnosti údajů

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

Název periodika

Metals

ISSN

2075-4701

e-ISSN

—

Svazek periodika

15

Číslo periodika v rámci svazku

10

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

11

Strana od-do

1-11

Kód UT WoS článku

001603835700001

EID výsledku v databázi Scopus

2-s2.0-105020161913