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

Kód výsledku v 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>

Nalezeny alternativní kódy

RIV/00216305:26210/21:PU143910

Výsledek na webu

<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>

Jazyk výsledku

angličtina

Název v původním jazyce

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

Popis výsledku v původním jazyce

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

Název v anglickém jazyce

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

Popis výsledku anglicky

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

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

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

Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

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

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Additive Manufacturing

ISSN

2214-8604

e-ISSN

2214-7810

Svazek periodika

47

Číslo periodika v rámci svazku

Nov.

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

14

Strana od-do

102265

Kód UT WoS článku

000700252500004

EID výsledku v databázi Scopus

2-s2.0-85113996411