Influence of the thermal history on the phase composition of laser directed energy deposited Ti-8.5 wt% Mo alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F22%3AN0000024" target="_blank" >RIV/26316919:_____/22:N0000024 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/22:10446613

Výsledek na webu

<a href="https://doi.org/10.1016/j.matdes.2022.111049" target="_blank" >https://doi.org/10.1016/j.matdes.2022.111049</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matdes.2022.111049" target="_blank" >10.1016/j.matdes.2022.111049</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Influence of the thermal history on the phase composition of laser directed energy deposited Ti-8.5 wt% Mo alloy

Popis výsledku v původním jazyce

Ti-8.5Mo (wt%) alloy was prepared by laser directed energy deposition (L-DED) from the mixture of cp-Ti and Ti-15Mo powder in the ratio of 50:50 using constant laser power of 600 W. Microstructure of as -printed material was characterized by microhardness mapping, light and scanning electron microscopy employing EDS technique and local X-ray diffraction measurements. In particular, the influence of the baseplate preheating to 500 ? on microstructure evolution was determined. The microstructure of the as-deposited samples consists of columnar grains orientated parallel to the building direction. Volume fraction of alpha, beta and omega phases, and consequently also microhardness, vary for different positions within the sample due to different thermal history during the printing process. Bottom part of the sample contains increased fraction of alpha phase due to longer exposure to temperatures favorable for alpha phase precipitation. Preheating of the baseplate provides additional thermodynamic stabilization of the alpha phase. Numerical model, predicting the temperature evolution in each layer of the sample during deposition and consequently the ultimate phase composition, was developed. The results obtained from the model are consistent with the experimentally observed phase transformations. CO 2022 The Author(s). Published by Elsevier Ltd.

Název v anglickém jazyce

Influence of the thermal history on the phase composition of laser directed energy deposited Ti-8.5 wt% Mo alloy

Popis výsledku anglicky

Ti-8.5Mo (wt%) alloy was prepared by laser directed energy deposition (L-DED) from the mixture of cp-Ti and Ti-15Mo powder in the ratio of 50:50 using constant laser power of 600 W. Microstructure of as -printed material was characterized by microhardness mapping, light and scanning electron microscopy employing EDS technique and local X-ray diffraction measurements. In particular, the influence of the baseplate preheating to 500 ? on microstructure evolution was determined. The microstructure of the as-deposited samples consists of columnar grains orientated parallel to the building direction. Volume fraction of alpha, beta and omega phases, and consequently also microhardness, vary for different positions within the sample due to different thermal history during the printing process. Bottom part of the sample contains increased fraction of alpha phase due to longer exposure to temperatures favorable for alpha phase precipitation. Preheating of the baseplate provides additional thermodynamic stabilization of the alpha phase. Numerical model, predicting the temperature evolution in each layer of the sample during deposition and consequently the ultimate phase composition, was developed. The results obtained from the model are consistent with the experimentally observed phase transformations. CO 2022 The Author(s). Published by Elsevier Ltd.

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

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

2022

Kód důvěrnosti údajů

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

Název periodika

MATERIALS & DESIGN

ISSN

0264-1275

e-ISSN

1873-4197

Svazek periodika

222

Číslo periodika v rámci svazku

OCTOBER 2022

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

12

Strana od-do

nestránkováno

Kód UT WoS článku

000863299700001

EID výsledku v databázi Scopus

2-s2.0-85136456402