Determination of Current Mechanical Properties of Components in Service Using Sub-Sized Specimens

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F16%3AN0000022" target="_blank" >RIV/26316919:_____/16:N0000022 - isvavai.cz</a>

Alternative codes found

RIV/26316919:_____/16:N0000021

Result on the web

<a href="http://www.vttresearch.com/impact/publications" target="_blank" >http://www.vttresearch.com/impact/publications</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

Determination of Current Mechanical Properties of Components in Service Using Sub-Sized Specimens

Original language description

Degradation of the properties of metal materials can lead to loss of reliability and safety of machines and metal structures in power plants during their operation. However, a number of these machines or metal structures (e.g. turbines, boilers and steam lines) could be used for longer time than has been predicted by their designed lifetime. A component’s residual life can be evaluated with standard me-chanical test techniques, such as the tensile test, the fatigue test, the Charpy or the fracture toughness test. However, for these tests there is usually insufficient material to sample non-invasively from the component. Therefore, non-destructive techniques are being developed as well as testing methods using mini-samples. One of the widely used methods of mini-samples testing is the Small Punch Test (SPT). The SPT is usually based on conversion of the obtained results into conventional mechanical characteristics. How-ever, it requires known correlation parameters determined for the specific material and must be verified for each new material. On the other hand, there exist small specimen testing techniques (e.g. the micro-tensile test, the miniature fatigue test and the mini-Charpy test) respecting the same loading mode as in the case of standard samples and maintaining minimal material requirements without requiring previ-ously established correlations. This paper focuses on the applicability and reliability of these testing techniques for determining cur-rent mechanical properties of components in service. Therefore, material degradation can be correctly and non-destructively determined.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

JG - Metallurgy, metal materials

OECD FORD branch

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Project

<a href="/en/project/LO1412" target="_blank" >LO1412: Development of the West Bohemian Centre of Materials and Metallurgy</a><br>

Continuities

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Publication year

2016

Confidentiality

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

Article name in the collection

Baltica X International Conference on Life Management and Maintenance for Power Plants

ISBN

978-951-38-8436-9

ISSN

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e-ISSN

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Number of pages

12

Pages from-to

281-292

Publisher name

VTT TECHNOLOGY

Place of publication

Helsinki

Event location

Helsinki

Event date

Jun 7, 2016

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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