Initiation and growth of short fatigue cracks in austenitic Sanicro 25 steel

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F18%3A00492026" target="_blank" >RIV/68081723:_____/18:00492026 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1111/ffe.12794" target="_blank" >http://dx.doi.org/10.1111/ffe.12794</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1111/ffe.12794" target="_blank" >10.1111/ffe.12794</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Initiation and growth of short fatigue cracks in austenitic Sanicro 25 steel

Popis výsledku v původním jazyce

Austenitic heat‐resistant stainless steel Sanicro 25, often used in energy productionninstallations, was cyclically strained at room temperature, and initiationnand growth of short fatigue cracks have been studied. Cylindrical specimensnwith pre‐existing shallow notch were cyclically strained under constant totalnstrain amplitudes, while the surface relief, crack initiation, and short crackngrowth were observed, in‐situ, using optical and electron microscopes.nPersistent slip markings were found to be the principal locations where naturalnfatigue cracks initiated. The character of the crack paths of short cracks wasnstudied using SEM and EBSD techniques. The results exhibit prevailingntransgranular crack growth, ie, along the persistent slip markings within thengrains. The growth of the largest cracks in the central part of the shallow notchnwas measured for different applied strain amplitudes. Because the coalescencenof initiated cracks plays a significant role during crack growth, the use of then“equivalent crack” concept gives adequate results in the description of the crackngrowth rate. The crack growth law of short cracks was established andncompared with the Manson‐Coffin law of the material.

Název v anglickém jazyce

Initiation and growth of short fatigue cracks in austenitic Sanicro 25 steel

Popis výsledku anglicky

Austenitic heat‐resistant stainless steel Sanicro 25, often used in energy productionninstallations, was cyclically strained at room temperature, and initiationnand growth of short fatigue cracks have been studied. Cylindrical specimensnwith pre‐existing shallow notch were cyclically strained under constant totalnstrain amplitudes, while the surface relief, crack initiation, and short crackngrowth were observed, in‐situ, using optical and electron microscopes.nPersistent slip markings were found to be the principal locations where naturalnfatigue cracks initiated. The character of the crack paths of short cracks wasnstudied using SEM and EBSD techniques. The results exhibit prevailingntransgranular crack growth, ie, along the persistent slip markings within thengrains. The growth of the largest cracks in the central part of the shallow notchnwas measured for different applied strain amplitudes. Because the coalescencenof initiated cracks plays a significant role during crack growth, the use of then“equivalent crack” concept gives adequate results in the description of the crackngrowth rate. The crack growth law of short cracks was established andncompared with the Manson‐Coffin law of the material.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20306 - Audio engineering, reliability analysis

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Rok uplatnění

2018

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

41

Číslo periodika v rámci svazku

7

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

17

Strana od-do

1529-1545

Kód UT WoS článku

000434273100007

EID výsledku v databázi Scopus

—