Investigation of High Strength Stainless Steel Using Small Specimen Test Techniques – Tensile and Fatigue Properties

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F17%3AN0000061" target="_blank" >RIV/26316919:_____/17:N0000061 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/26316919:_____/17:N0000062

Výsledek na webu

<a href="https://paginas.fe.up.pt/~m2d/Proceedings_M2D2017/data/papers/6841.pdf" target="_blank" >https://paginas.fe.up.pt/~m2d/Proceedings_M2D2017/data/papers/6841.pdf</a>

DOI - Digital Object Identifier

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Jazyk výsledku

angličtina

Název v původním jazyce

Investigation of High Strength Stainless Steel Using Small Specimen Test Techniques – Tensile and Fatigue Properties

Popis výsledku v původním jazyce

The evaluation of mechanical properties of in service components is a critical issue for many technological units in order to estimate safe residual service life. Therefore, there are being used and further developed non-destructive as well as semi-destructive testing methods allowing material properties evaluation of the operated components. Some methods are using empirical correlation allowing of conversion of some measured characteristics into “standardly” used terms (e.g. Small Punch Test, Automated Ball Indentation..). Some other methods focus on miniaturization of standard shape testing samples. Basic properties used mostly for the service life evaluation are tensile strength, impact notch toughness or impact notch toughness transition curve, fracture toughness, creep and high cycle fatigue. The current paper is dealing mainly with high cycle fatigue properties determination with the use of mini samples that can be extracted out of in service components. Additionally, small size Micro-Tensile Tests are being also applied in order to provide initial stress levels for subsequent high cycle fatigue tests. The material investigated is precipitation hardening steel X1CrNiMoAlTi 12-11-2. Small size specimens are extracted from the experimental block by Electro Discharging sampling machine that is used for a real in-service components sampling in order to keep current experimental program as close to reality as possible. Tensile test properties as well as high cycle properties are assessed with the use of small size specimens and standard size specimens. Very good agreement is found between both specimens sizes proving possibility of small size specimens’ application to residual service life assessment with higher accuracy in comparison to the methods using empirical correlations for the properties evaluation.

Název v anglickém jazyce

Investigation of High Strength Stainless Steel Using Small Specimen Test Techniques – Tensile and Fatigue Properties

Popis výsledku anglicky

The evaluation of mechanical properties of in service components is a critical issue for many technological units in order to estimate safe residual service life. Therefore, there are being used and further developed non-destructive as well as semi-destructive testing methods allowing material properties evaluation of the operated components. Some methods are using empirical correlation allowing of conversion of some measured characteristics into “standardly” used terms (e.g. Small Punch Test, Automated Ball Indentation..). Some other methods focus on miniaturization of standard shape testing samples. Basic properties used mostly for the service life evaluation are tensile strength, impact notch toughness or impact notch toughness transition curve, fracture toughness, creep and high cycle fatigue. The current paper is dealing mainly with high cycle fatigue properties determination with the use of mini samples that can be extracted out of in service components. Additionally, small size Micro-Tensile Tests are being also applied in order to provide initial stress levels for subsequent high cycle fatigue tests. The material investigated is precipitation hardening steel X1CrNiMoAlTi 12-11-2. Small size specimens are extracted from the experimental block by Electro Discharging sampling machine that is used for a real in-service components sampling in order to keep current experimental program as close to reality as possible. Tensile test properties as well as high cycle properties are assessed with the use of small size specimens and standard size specimens. Very good agreement is found between both specimens sizes proving possibility of small size specimens’ application to residual service life assessment with higher accuracy in comparison to the methods using empirical correlations for the properties evaluation.

Druh

D - Stať ve sborníku

CEP obor

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OECD FORD obor

20501 - Materials engineering

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

2017

Kód důvěrnosti údajů

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

Název statě ve sborníku

Proceedings of the 7th International Conference on Mechanics and Materials in Design

ISBN

978-989-98832-7-7

ISSN

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e-ISSN

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Počet stran výsledku

12

Strana od-do

343-354

Název nakladatele

INEGI-FEUP

Místo vydání

Albufeira, Portugalsko

Místo konání akce

Albufeira, Portugalsko

Datum konání akce

11. 6. 2017

Typ akce podle státní příslušnosti

WRD - Celosvětová akce

Kód UT WoS článku

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