In-situ investigation of phase transformations in ultra-fine grained Ti15Mo alloy

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F21%3A10427390" target="_blank" >RIV/00216208:11320/21:10427390 - isvavai.cz</a>

Výsledek na webu

<a href="https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CNpSTMikhb" target="_blank" >https://verso.is.cuni.cz/pub/verso.fpl?fname=obd_publikace_handle&handle=CNpSTMikhb</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2021.159027" target="_blank" >10.1016/j.jallcom.2021.159027</a>

Jazyk výsledku

angličtina

Název v původním jazyce

In-situ investigation of phase transformations in ultra-fine grained Ti15Mo alloy

Popis výsledku v původním jazyce

A metastable beta solution treated Ti15Mo alloy was deformed by high pressure torsion (HPT) resulting in a severely deformed microstructure with high density of lattice defects. In order to gain insight into the kinetics of phase transformations, both non-deformed and HPT-deformed materials were studied in-situ during linear heating; phase evolution was investigated using high energy synchrotron X-ray diffraction (HEXRD) complemented by the measurement of electrical resistance. It was shown that in the non-deformed material the dissolution of the omega phase is followed by precipitation of the alpha phase during linear heating. In contrast, in the HPT-deformed material the nucleation of the alpha phase is shifted to lower temperatures, resulting in the coexistence of all three beta, omega, and alpha phases at similar to 550 degrees C. Moreover, in HPT-deformed samples, the growth of a particles is accelerated due to high density of dislocations and grain boundaries. Post-mortem observations of selected samples revealed that the microstructure of the HPT-deformed material after heating up to 650 degrees C remains ultra-fine grained with equiaxed grains of a phase. (C) 2021 Published by Elsevier B.V.

Název v anglickém jazyce

In-situ investigation of phase transformations in ultra-fine grained Ti15Mo alloy

Popis výsledku anglicky

A metastable beta solution treated Ti15Mo alloy was deformed by high pressure torsion (HPT) resulting in a severely deformed microstructure with high density of lattice defects. In order to gain insight into the kinetics of phase transformations, both non-deformed and HPT-deformed materials were studied in-situ during linear heating; phase evolution was investigated using high energy synchrotron X-ray diffraction (HEXRD) complemented by the measurement of electrical resistance. It was shown that in the non-deformed material the dissolution of the omega phase is followed by precipitation of the alpha phase during linear heating. In contrast, in the HPT-deformed material the nucleation of the alpha phase is shifted to lower temperatures, resulting in the coexistence of all three beta, omega, and alpha phases at similar to 550 degrees C. Moreover, in HPT-deformed samples, the growth of a particles is accelerated due to high density of dislocations and grain boundaries. Post-mortem observations of selected samples revealed that the microstructure of the HPT-deformed material after heating up to 650 degrees C remains ultra-fine grained with equiaxed grains of a phase. (C) 2021 Published by Elsevier B.V.

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)<br>S - Specificky vyzkum na vysokych skolach<br>I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2021

Kód důvěrnosti údajů

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

Název periodika

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Svazek periodika

867

Číslo periodika v rámci svazku

červen

Stát vydavatele periodika

CH - Švýcarská konfederace

Počet stran výsledku

10

Strana od-do

159027

Kód UT WoS článku

000630276200056

EID výsledku v databázi Scopus

2-s2.0-85100653256