Matrix Transformation in Boron Containing High-Temperature Co-Re-Cr Alloys

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F18%3A10391755" target="_blank" >RIV/00216208:11320/18:10391755 - isvavai.cz</a>
Alternative codes found
RIV/61389005:_____/18:00492099
Result on the web
<a href="https://doi.org/10.1007/s12540-018-0121-8" target="_blank" >https://doi.org/10.1007/s12540-018-0121-8</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1007/s12540-018-0121-8" target="_blank" >10.1007/s12540-018-0121-8</a>

Result language
angličtina
Original language name
Matrix Transformation in Boron Containing High-Temperature Co-Re-Cr Alloys
Original language description
An addition of boron largely increases the ductility in polycrystalline high-temperature Co-Re alloys. Therefore, the effect of boron on the alloy structural characteristics is of high importance for the stability of the matrix at operational temperatures. Volume fractions of epsilon (hexagonal close-packed-hcp), gamma (face-centered cubic-fcc) and sigma (Cr2Re3 type) phases were measured at ambient and high temperatures (up to 1500 A degrees C) for a boron-containing Co-17Re-23Cr alloy using neutron diffraction. The matrix phase undergoes an allotropic transformation from epsilon to gamma structure at high temperatures, similar to pure cobalt and to the previously investigated, more complex Co-17Re-23Cr-1.2Ta-2.6C alloy. It was determined in this study that the transformation temperature depends on the boron content (0-1000 wt. ppm). Nevertheless, the transformation temperature did not change monotonically with the increase in the boron content but reached a minimum at approximately 200 ppm of boron. A probable reason is the interplay between the amount of boron in the matrix and the amount of sigma phase, which binds hcp-stabilizing elements (Cr and Re). Moreover, borides were identified in alloys with high boron content.
Czech name
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Czech description
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Type
J<sub>imp</sub> - 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
Result was created during the realization of more than one project. More information in the Projects tab.
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2018
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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