Microstructural instability of L-PBF Co-28Cr-6Mo alloy at elevated temperatures

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68378271%3A_____%2F21%3A00546266" target="_blank" >RIV/68378271:_____/21:00546266 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/60461373:22310/21:43922824

Výsledek na webu

<a href="https://doi.org/10.1016/j.addma.2021.102025" target="_blank" >https://doi.org/10.1016/j.addma.2021.102025</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.addma.2021.102025" target="_blank" >10.1016/j.addma.2021.102025</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructural instability of L-PBF Co-28Cr-6Mo alloy at elevated temperatures

Popis výsledku v původním jazyce

So far, little is known about the thermal stability of Co-28Cr-6Mo alloy when produced by laser powder bed fusion (L-PBF), one of the mostly used AM technologies. In the present study, we reveal the instability of this material already at temperatures above 673 K. Material hardening accompanied with a significant loss of plasticity is caused by the breakdown of fine cellular microstructure with intercellular Mo segregation, precipitation of σ-phase and phase transformation of the matrix. Detail characterization by transmission electron microscopy was carried out for the maximum hardness state obtained after annealing the alloy at 1173 K for 5 h. The important findings of this study, representing an operational risk for L-PBF Co-28Cr-6Mo alloy, call for subsequent research into suitable heat treatment that would induce the stability of the material.

Název v anglickém jazyce

Microstructural instability of L-PBF Co-28Cr-6Mo alloy at elevated temperatures

Popis výsledku anglicky

So far, little is known about the thermal stability of Co-28Cr-6Mo alloy when produced by laser powder bed fusion (L-PBF), one of the mostly used AM technologies. In the present study, we reveal the instability of this material already at temperatures above 673 K. Material hardening accompanied with a significant loss of plasticity is caused by the breakdown of fine cellular microstructure with intercellular Mo segregation, precipitation of σ-phase and phase transformation of the matrix. Detail characterization by transmission electron microscopy was carried out for the maximum hardness state obtained after annealing the alloy at 1173 K for 5 h. The important findings of this study, representing an operational risk for L-PBF Co-28Cr-6Mo alloy, call for subsequent research into suitable heat treatment that would induce the stability of the material.

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

<a href="/cs/project/LM2018110" target="_blank" >LM2018110: Výzkumná infrastruktura CzechNanoLab</a><br>

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

44

Číslo periodika v rámci svazku

Aug.

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

16

Strana od-do

102025

Kód UT WoS článku

000674619700002

EID výsledku v databázi Scopus

2-s2.0-85104508245