Comparison of Results of Accelerated and Conventional Creep Tests of Dissimilar Weld Joint of Steels FB2 and F

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F47718684%3A_____%2F17%3AN0000029" target="_blank" >RIV/47718684:_____/17:N0000029 - isvavai.cz</a>

Result on the web

<a href="https://www.scientific.net/MSF.891.322" target="_blank" >https://www.scientific.net/MSF.891.322</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.4028/www.scientific.net/MSF.891.322" target="_blank" >10.4028/www.scientific.net/MSF.891.322</a>

Result language

angličtina

Original language name

Comparison of Results of Accelerated and Conventional Creep Tests of Dissimilar Weld Joint of Steels FB2 and F

Original language description

The recently developed simulative accelerated creep testing (ACT) on a Gleeble thermal-mechanical simulator allows the microstructural transformation of creep-resisting materials in a relatively short time (less than 100 hours) to a state resembling that of multiyear application under creep conditions. This contribution deals with the comparison of long-term conventional creep testing (CCT) with ACT on a dissimilar weld joint prepared from steels COST FB2 (X13CrMoCoVNbN 9-1-1) and COST F (X14CrMoVNbN 10-1). Creep tests to rupture were carried out at temperatures from 550 °C to 650 °C in a stress range from 70 MPa to 220 MPa. Creep rupture strength was evaluated using the Larson-Miller parameter. Evolution of the microstructure, changes of precipitates and dislocation of the substructure in different zones of the weld joint (Fig. 1) were correlated with the position of fracture and the creep strength. The fine grained part of the heat affected zone of steel COST F was found to be a critical zone of creep damage. ACT of samples machined from various positions in the weldment was performed at 600°C under 100 MPa. Changes in the hardness and the microstructures of the samples, which underwent both types of creep tests, were compared. The results of both creep testing methods are compared from a point of view of the potential for utilization of ACT in industry. It seems that microstructural processes taking place during creep exposures are accelerated by ACT, however, further experiments have to be performed to improve the accuracy of fracture prediction and verification if long-term CCT is to be replaced by ACT.

Czech name

—

Czech description

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Type

J_SC - Article in a specialist periodical, which is included in the SCOPUS database

CEP classification

—

OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/TE01020068" target="_blank" >TE01020068: Centre of research and experimental development of reliable energy production</a><br>

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Materials Science Forum

ISSN

1662-9752

e-ISSN

1662-9752

Volume of the periodical

1662-9752

Issue of the periodical within the volume

1

Country of publishing house

CH - SWITZERLAND

Number of pages

8

Pages from-to

322-329

UT code for WoS article

—

EID of the result in the Scopus database

2-s2.0-85016970997