Initiation and short crack growth in austenitic?ferritic duplex steel-effect of positive mean stress

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F12%3A00386020" target="_blank" >RIV/68081723:_____/12:00386020 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1111/j.1460-2695.2011.01613.x" target="_blank" >http://dx.doi.org/10.1111/j.1460-2695.2011.01613.x</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/j.1460-2695.2011.01613.x" target="_blank" >10.1111/j.1460-2695.2011.01613.x</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Initiation and short crack growth in austenitic?ferritic duplex steel-effect of positive mean stress

Popis výsledku v původním jazyce

The effect of the mean stress on the crack initiation and short crack growth of austenitic?ferritic duplex steel has been studied. High mean stresses and stress amplitudes result in appreciable mean strain relaxation and long-term hardening. Mean stressproduces unidirectional slip bands and slip steps that serve as nuclei for persistent slip bands and persistent slip markings. It leads to the acceleration of the crack initiation and production of a high density of cracks. Crack linkage contributes to the growth of short cracks. The concept of equivalent crack was used to describe the crack growth. The kinetics of short crack growth with positive mean stress is similar to that in symmetric loading, that is, exponential growth is observed. Positive meanstress results in earlier crack initiation and in the acceleration of the crack growth rate. Both factors contribute to the decrease of the fatigue life.

Název v anglickém jazyce

Initiation and short crack growth in austenitic?ferritic duplex steel-effect of positive mean stress

Popis výsledku anglicky

The effect of the mean stress on the crack initiation and short crack growth of austenitic?ferritic duplex steel has been studied. High mean stresses and stress amplitudes result in appreciable mean strain relaxation and long-term hardening. Mean stressproduces unidirectional slip bands and slip steps that serve as nuclei for persistent slip bands and persistent slip markings. It leads to the acceleration of the crack initiation and production of a high density of cracks. Crack linkage contributes to the growth of short cracks. The concept of equivalent crack was used to describe the crack growth. The kinetics of short crack growth with positive mean stress is similar to that in symmetric loading, that is, exponential growth is observed. Positive meanstress results in earlier crack initiation and in the acceleration of the crack growth rate. Both factors contribute to the decrease of the fatigue life.

Druh

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

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

—

Projekt

<a href="/cs/project/GA101%2F07%2F1500" target="_blank" >GA101/07/1500: Nové principy pro predikci životnosti strojních součástí zatěžovaných proměnnými silami</a><br>

Návaznosti

Z - Vyzkumny zamer (s odkazem do CEZ)<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2012

Kód důvěrnosti údajů

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

Název periodika

Fatigue and Fracture of Engineering Materials and Structures

ISSN

8756-758X

e-ISSN

—

Svazek periodika

35

Číslo periodika v rámci svazku

3

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

257-268

Kód UT WoS článku

000300765800006

EID výsledku v databázi Scopus

—