Mechanical Properties and Dislocation Structure Evolution in Ti6Al7Nb Alloy Processed by High Pressure Torsion

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216208%3A11320%2F14%3A10289747" target="_blank" >RIV/00216208:11320/14:10289747 - isvavai.cz</a>

Výsledek na webu

<a href="http://dx.doi.org/10.1007/s11661-013-1763-2" target="_blank" >http://dx.doi.org/10.1007/s11661-013-1763-2</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1007/s11661-013-1763-2" target="_blank" >10.1007/s11661-013-1763-2</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical Properties and Dislocation Structure Evolution in Ti6Al7Nb Alloy Processed by High Pressure Torsion

Popis výsledku v původním jazyce

Ultrafine-grained biocompatible Ti-6Al-7Nb alloy was produced by high pressure torsion (HPT). Lattice defects-vacancies and dislocations-investigated by positron annihilation spectroscopy, observations by scanning electron microscopy, and microhardness evaluation are linked to the strain imposed by different numbers of HPT revolutions and to the distance from the specimen center. Positron annihilation spectroscopy showed significant increase of dislocation density and concentration of vacancy clusters after of the HPT revolution. Microhardness increases by 20 pct with increasing strain, but it is heterogenous due to duplex microstructure. The heterogeneity of the microhardness increases with increasing strain, suggesting that a heavily deformed and fragmented alpha+beta lamellar microstructure is more hardened than primary alpha grains. The defect structure is homogenous after HPT revolution, while the microhardness becomes homogenous after 3 HPT revolutions only. (C) The Minerals, Met

Název v anglickém jazyce

Mechanical Properties and Dislocation Structure Evolution in Ti6Al7Nb Alloy Processed by High Pressure Torsion

Popis výsledku anglicky

Ultrafine-grained biocompatible Ti-6Al-7Nb alloy was produced by high pressure torsion (HPT). Lattice defects-vacancies and dislocations-investigated by positron annihilation spectroscopy, observations by scanning electron microscopy, and microhardness evaluation are linked to the strain imposed by different numbers of HPT revolutions and to the distance from the specimen center. Positron annihilation spectroscopy showed significant increase of dislocation density and concentration of vacancy clusters after of the HPT revolution. Microhardness increases by 20 pct with increasing strain, but it is heterogenous due to duplex microstructure. The heterogeneity of the microhardness increases with increasing strain, suggesting that a heavily deformed and fragmented alpha+beta lamellar microstructure is more hardened than primary alpha grains. The defect structure is homogenous after HPT revolution, while the microhardness becomes homogenous after 3 HPT revolutions only. (C) The Minerals, Met

Druh

J_x - Nezařazeno - Článek v odborném periodiku (Jimp, Jsc a Jost)

CEP obor

BM - Fyzika pevných látek a magnetismus

OECD FORD obor

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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

2014

Kód důvěrnosti údajů

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

Název periodika

Metallurgical and Materials Transactions A: Physical Metallurgy and Materials Science

ISSN

1073-5623

e-ISSN

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Svazek periodika

45A

Číslo periodika v rámci svazku

1

Stát vydavatele periodika

US - Spojené státy americké

Počet stran výsledku

9

Strana od-do

7-15

Kód UT WoS článku

000331092300003

EID výsledku v databázi Scopus

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