EFFECT OF LONG-TERM AGEING AT 475 °C ON PROPERTIES AND MICROSTRUCTURE OF CUSTOM 465 STEEL

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F25870807%3A_____%2F17%3AN0000013" target="_blank" >RIV/25870807:_____/17:N0000013 - isvavai.cz</a>

Result on the web

<a href="https://www.metal2018.com/files/uploads/02/METAL2017_conference_proceedings_content.pdf" target="_blank" >https://www.metal2018.com/files/uploads/02/METAL2017_conference_proceedings_content.pdf</a>

DOI - Digital Object Identifier

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Result language

angličtina

Original language name

EFFECT OF LONG-TERM AGEING AT 475 °C ON PROPERTIES AND MICROSTRUCTURE OF CUSTOM 465 STEEL

Original language description

The steels with high chromium content are known to suffer embrittlement at elevated temperature induced either by decomposition of the microstructure into two arranged solid solutions α+α´ (embrittlement at 475 °C) or by precipitation of chromium-rich brittle phase . Martensitic precipitation hardening steels belong among materials having chromium content close to the minimum embrittlement concentration and in some circumstances there could be possibility of prolonged exposure of these steels at elevated temperatures. The effect of long-term ageing (1,000, 2,000 and 3,000 hours at 475 °C) on the material properties, microstructure and substructure of precipitation hardening martensitic stainless steel CUSTOM 465 was analysed and the additional precipitation of very fine particles of intermetallic phases and also decomposition of solid solution α into chromium-rich particles of the phase α´ with nanometric size was found. Despite expectations a slight decrease of strength and impact energy was detected after ageing at 475 °C as a result of stabilization of reverted austenite, which completely compensated the effect of the additional precipitation hardening of martensite. The total content of reverted austenite even doubled after ageing in comparison with the as-received state, although the ageing temperature was significantly lower than the temperature Ac1 of the steel.

Czech name

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Czech description

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Type

D - Article in proceedings

CEP classification

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OECD FORD branch

20501 - Materials engineering

Project

<a href="/en/project/LO1203" target="_blank" >LO1203: Regional Materials Science and Technology Centre - Feasibility Program</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

Article name in the collection

METAL 2017 - 26th International Conference on Metalurgy and Materials

ISBN

978-80-87294-79-6

ISSN

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e-ISSN

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Number of pages

6

Pages from-to

991-996

Publisher name

Tanger, Ltd., Keltičkova 62, 710 00 Ostrava. Czech Republic

Place of publication

Ostrava

Event location

Brno

Event date

May 24, 2017

Type of event by nationality

WRD - Celosvětová akce

UT code for WoS article

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