Microstructure evolution in compositionally graded Ti(4–12 wt% Mo) prepared by laser directed energy deposition

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F26316919%3A_____%2F23%3AN0000037" target="_blank" >RIV/26316919:_____/23:N0000037 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/00216208:11320/23:10474588

Výsledek na webu

<a href="https://www.sciencedirect.com/science/article/pii/S2238785423002181" target="_blank" >https://www.sciencedirect.com/science/article/pii/S2238785423002181</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jmrt.2023.01.215" target="_blank" >10.1016/j.jmrt.2023.01.215</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Microstructure evolution in compositionally graded Ti(4–12 wt% Mo) prepared by laser directed energy deposition

Popis výsledku v původním jazyce

Compositionally graded Ti(4-12 wt% Mo) alloys were successfully prepared by laser directed energy deposition (L-DED) using two hoppers from Ti and Ti-15Mo master alloy powders. Detailed SEM, EDS and XRD analysis reveals the variation of the microstructure and consequently explains the evolution of the microhardness with the Mo concentration. High laser power is required to dissolve Ti-15Mo particles, to improve the homogeneity of the material at the scale of particle size, and to achieve a smooth linear gradient of the chemical composition. In the bottom part of the samples, the microstructure consists of elongated beta grains of the length of several mm containing big a-Ti laths. With increasing Mo concentration, the volume fraction of a phase decreases. Starting from the composition of about 9 wt% Mo the presence of u phase was detected. Microhardness values span over a wide range of 270-550 HV and are affected by phase composition. The highest values of microhardness are achieved at around 10 wt% of Mo. However, phase composition and microhardness depend also on the utilized laser power and position in the sample deter-mining the cooling rates. L-DED is capable of producing functionally graded materials (FGM) on the basis of metastable b-Ti alloys providing large variations of mechanical properties within a single sample/product. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Název v anglickém jazyce

Microstructure evolution in compositionally graded Ti(4–12 wt% Mo) prepared by laser directed energy deposition

Popis výsledku anglicky

Compositionally graded Ti(4-12 wt% Mo) alloys were successfully prepared by laser directed energy deposition (L-DED) using two hoppers from Ti and Ti-15Mo master alloy powders. Detailed SEM, EDS and XRD analysis reveals the variation of the microstructure and consequently explains the evolution of the microhardness with the Mo concentration. High laser power is required to dissolve Ti-15Mo particles, to improve the homogeneity of the material at the scale of particle size, and to achieve a smooth linear gradient of the chemical composition. In the bottom part of the samples, the microstructure consists of elongated beta grains of the length of several mm containing big a-Ti laths. With increasing Mo concentration, the volume fraction of a phase decreases. Starting from the composition of about 9 wt% Mo the presence of u phase was detected. Microhardness values span over a wide range of 270-550 HV and are affected by phase composition. The highest values of microhardness are achieved at around 10 wt% of Mo. However, phase composition and microhardness depend also on the utilized laser power and position in the sample deter-mining the cooling rates. L-DED is capable of producing functionally graded materials (FGM) on the basis of metastable b-Ti alloys providing large variations of mechanical properties within a single sample/product. (c) 2023 The Author(s). Published by Elsevier B.V. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

Druh

J_imp - Článek v periodiku v databázi Web of Science

CEP obor

—

OECD FORD obor

20501 - Materials engineering

Projekt

<a href="/cs/project/GA21-14030S" target="_blank" >GA21-14030S: Aditivní výroba komplexních koncentrovaných slitin s gradientem složení</a><br>

Návaznosti

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

Rok uplatnění

2023

Kód důvěrnosti údajů

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

Název periodika

JOURNAL OF MATERIALS RESEARCH AND TECHNOLOGY-JMR&T

ISSN

2238-7854

e-ISSN

2214-0697

Svazek periodika

23

Číslo periodika v rámci svazku

MAR-APR 2023

Stát vydavatele periodika

NL - Nizozemsko

Počet stran výsledku

11

Strana od-do

4527-4537

Kód UT WoS článku

000964243700001

EID výsledku v databázi Scopus

2-s2.0-85149740806