In-situ Study of the Mechanisms of High Temperature Damage in Elastic-plastic Cyclic Loading of Nickel Superalloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26620%2F14%3APU107953" target="_blank" >RIV/00216305:26620/14:PU107953 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.4028/www.scientific.net/AMR.891-892.530" target="_blank" >http://dx.doi.org/10.4028/www.scientific.net/AMR.891-892.530</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/AMR.891-892.530" target="_blank" >10.4028/www.scientific.net/AMR.891-892.530</a>

Jazyk výsledku

angličtina

Název v původním jazyce

In-situ Study of the Mechanisms of High Temperature Damage in Elastic-plastic Cyclic Loading of Nickel Superalloy

Popis výsledku v původním jazyce

In-situ Low Cycle Fatigue test (LCF) at temperature 635 C have been performed in SEM on flat specimen of cast Inconel 713LC superalloy. The aim of the investigation was to study mechanisms of the fatigue damage during elastic-plastic cycling by the observations of the characteristic surface relief evolution and the accompanying internal dislocation structures. The selected locations on the surface were systematically studied in-situ and documented by SEM and using AFM. The surface relief in the first tensile half-cycle was formed by numerous slip steps on the primary slip planes (111). In the following compression half-cycle additional opposite slip were formed. The relief was modified in the next cycles but without forming additionally new slip traces in the primary system. The reorientation of two grains in the gauge area was measured using EBSD. At the end of cyclic loading the relation between surface persistent slip markings and persistent slip bands in the interior of the material was documented by TEM on lamella prepared by FIB. The early stages of extrusion and intrusion formation were documented. The damage mechanism evolution is closely connected with the cyclic strain localization to the persistent slip bands that are also places of fatigue crack initiation.

Název v anglickém jazyce

In-situ Study of the Mechanisms of High Temperature Damage in Elastic-plastic Cyclic Loading of Nickel Superalloy

Popis výsledku anglicky

In-situ Low Cycle Fatigue test (LCF) at temperature 635 C have been performed in SEM on flat specimen of cast Inconel 713LC superalloy. The aim of the investigation was to study mechanisms of the fatigue damage during elastic-plastic cycling by the observations of the characteristic surface relief evolution and the accompanying internal dislocation structures. The selected locations on the surface were systematically studied in-situ and documented by SEM and using AFM. The surface relief in the first tensile half-cycle was formed by numerous slip steps on the primary slip planes (111). In the following compression half-cycle additional opposite slip were formed. The relief was modified in the next cycles but without forming additionally new slip traces in the primary system. The reorientation of two grains in the gauge area was measured using EBSD. At the end of cyclic loading the relation between surface persistent slip markings and persistent slip bands in the interior of the material was documented by TEM on lamella prepared by FIB. The early stages of extrusion and intrusion formation were documented. The damage mechanism evolution is closely connected with the cyclic strain localization to the persistent slip bands that are also places of fatigue crack initiation.

Druh

D - Stať ve sborníku

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/ED1.1.00%2F02.0068" target="_blank" >ED1.1.00/02.0068: CEITEC - central european institute of technology</a><br>

Návaznosti

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

Rok uplatnění

2014

Kód důvěrnosti údajů

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

Název statě ve sborníku

11th International Fatigue Congress

ISBN

978-3-03835-008-8

ISSN

1022-6680

e-ISSN

1662-8985

Počet stran výsledku

6

Strana od-do

530-535

Název nakladatele

Neuveden

Místo vydání

Neuveden

Místo konání akce

Melbourne

Datum konání akce

3. 3. 2014

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

000337767700083