Heat treatment of laser powder-bed-fused Co-28Cr-6Mo alloy to remove its microstructural instability by massive FCC→HCP transformation

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00546228" target="_blank" >RIV/68378271:_____/21:00546228 - isvavai.cz</a>
Alternative codes found
RIV/00216305:26210/21:PU143910
Result on the web
<a href="https://doi.org/10.1016/j.addma.2021.102265" target="_blank" >https://doi.org/10.1016/j.addma.2021.102265</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.addma.2021.102265" target="_blank" >10.1016/j.addma.2021.102265</a>

Result language
angličtina
Original language name
Heat treatment of laser powder-bed-fused Co-28Cr-6Mo alloy to remove its microstructural instability by massive FCC→HCP transformation
Original language description
Laser powder bed fusion of Co–28Cr–6Mo alloy is a powerful tool for many engineering applications but one has to be familiar with its microstructural instability in the as-produced state. In our previous study, we depicted the phenomenon of this instability when exposing the material to temperatures above 673 K. In the present study, we follow up by revealing the effect of this hardening on mechanical properties in tension and show the beneficial effect of heat treatment on removing the observed instability. Hardening associated with increasing the proportion of HCP ε-phase and with the precipitation of σ-phase has a detrimental effect on material plasticity. We thus applied a two-stage heat treatment comprising solution annealing at 1473 K/2 h and aging at 1173 K/5 h. Not only it induced material stability but also increased the material strength with not such a detrimental decrease in material plasticity as was brought by direct aging at 1173 K/5 h.n
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
2021
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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