Ageing response of sub-transus heat treated Ti-6.8Mo-4.5Fe-1.5Al alloy

Result code in IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F17%3A10367037" target="_blank" >RIV/00216208:11320/17:10367037 - isvavai.cz</a>

Result on the web

<a href="http://dx.doi.org/10.1016/j.jallcom.2017.07.036" target="_blank" >http://dx.doi.org/10.1016/j.jallcom.2017.07.036</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.jallcom.2017.07.036" target="_blank" >10.1016/j.jallcom.2017.07.036</a>

Result language

angličtina

Original language name

Ageing response of sub-transus heat treated Ti-6.8Mo-4.5Fe-1.5Al alloy

Original language description

In this study, phase transformations occurring during ageing of Timetal LCB (Ti-6.8Mo-4.5Fe-1.5Al in wt.%) and their influence on mechanical properties were investigated. The initial condition was prepared by solution treating above beta-transus directly followed by heat treatment in alpha/beta temperature regime. This treatment resulted in precipitation of alpha phase on beta/beta grain boundaries. The subsequent ageing response of this material was studied during isothermal ageing at 400 degrees C, 450 degrees C and 500 degrees C. The phase transformations were studied by X-ray diffraction, scanning electron microscopy (SEM) and transmission electron microscopy (TEM). Mechanical properties were investigated using microhardness measurements. During ageing at 400 degrees C, the omega phase was detected in all studied conditions. Due to its presence in the material, very fine and homogeneously distributed alpha particles were formed, leading to a high microhardness. At 450 degrees C, the omega phase disappeared already after a few hours of ageing. The highest microhardness values at this temperature were reached in samples aged for a few hours after the dissolution of omega particles. No omega was detected in samples aged at 500 degrees C. The alpha phase morphology after ageing at 500 degrees C consisted of large plate-shaped precipitates which coarsened rapidly with increasing ageing time. This coarse microstructure corresponded to a low microhardness.

Czech name

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Czech description

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Type

J_imp - Article in a specialist periodical, which is included in the Web of Science database

CEP classification

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OECD FORD branch

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

Project

Result was created during the realization of more than one project. More information in the Projects tab.

Continuities

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

Publication year

2017

Confidentiality

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

Name of the periodical

Journal of Alloys and Compounds

ISSN

0925-8388

e-ISSN

—

Volume of the periodical

724

Issue of the periodical within the volume

Listopad

Country of publishing house

CH - SWITZERLAND

Number of pages

8

Pages from-to

373-380

UT code for WoS article

000407848400045

EID of the result in the Scopus database

2-s2.0-85021946384