Effect of phase separation on tensile and Charpy impact properties of MA956 ODS steel

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10370265" target="_blank" >RIV/00216208:11320/17:10370265 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.msea.2017.06.010" target="_blank" >http://dx.doi.org/10.1016/j.msea.2017.06.010</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.msea.2017.06.010" target="_blank" >10.1016/j.msea.2017.06.010</a>

Result language

angličtina

Original language name

Effect of phase separation on tensile and Charpy impact properties of MA956 ODS steel

Original language description

Tensile and Charpy tests were carried out to investigate the effect of phase separation on the mechanical properties of MA956 oxide dispersion strengthened high chromium steel. The ferritic matrix of the investigated material separates into Fe-rich alpha and Cr-rich alpha&apos; phases during thermal ageing at 475 degrees C. The yield stress and tensile strength increased in the aged material due to the formation of the nanometric sized precipitates while the ductility was decreasing with ageing time. The effect of Cr-rich precipitates on the strengthening was estimated using analytical models based on different mechanisms. Modulus strengthening can be considered the most important contribution to the yield strength increase. Charpy properties showed orientation dependence reflecting the anisotropy in the microstructure. The thermally aged MA956 alloy exhibited inferior Charpy impact properties compared to the as-received material. After ageing for 1000 h the ductile-brittle transition temperature (DBTT) was shifted by 200 degrees C to higher temperatures, while the upper shelf energy decreased dramatically. In samples with L-R orientation, crack arrester type delamination was observed which is considered to increase the upper shelf energy as compared to the other orientations.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

10302 - Condensed matter physics (including formerly solid state physics, supercond.)

Project

<a href="/en/project/GB14-36566G" target="_blank" >GB14-36566G: Multidisciplinary research centre for advanced materials</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 &amp; Engineering A: Structural Materials: Properties, Microstructure and Processing

ISSN

0921-5093

e-ISSN

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Volume of the periodical

700

Issue of the periodical within the volume

neuveden

Country of publishing house

CH - SWITZERLAND

Number of pages

13

Pages from-to

425-437

UT code for WoS article

000406564300049

EID of the result in the Scopus database

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