Mechanical properties of high niobium TiAl alloys doped with Mo and C

Kód výsledku v IS VaVaI

<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F68081723%3A_____%2F16%3A00458280" target="_blank" >RIV/68081723:_____/16:00458280 - isvavai.cz</a>

Nalezeny alternativní kódy

RIV/61389005:_____/16:00458280

Výsledek na webu

<a href="http://dx.doi.org/10.1016/j.matdes.2016.03.079" target="_blank" >http://dx.doi.org/10.1016/j.matdes.2016.03.079</a>

DOI - Digital Object Identifier

<a href="http://dx.doi.org/10.1016/j.matdes.2016.03.079" target="_blank" >10.1016/j.matdes.2016.03.079</a>

Jazyk výsledku

angličtina

Název v původním jazyce

Mechanical properties of high niobium TiAl alloys doped with Mo and C

Popis výsledku v původním jazyce

Effects of alloying elements (i.e., variable content of Mo and C) on the microstructure and mechanical properties of five types of experimental material based on TiAl alloy containing 7 at.% Nb were investigated. Mechanical properties (tensile, compression and fatigue) at room and at elevated temperatures were evaluated. Addition of Mo and/or C resulted in different phase compositions and three typical microstructures. To judge the effect of alloying on the microstructure the comparison with reference TiAl alloy with 7 at.% Nb without C and Mo addition was used. Evaluation of mechanical properties of individual alloys revealed two most promising variants: (i) alloy with 2 at.% Mo containing beta phase, having mixed microstructure and exhibiting the highest ductility, (ii) alloy with 0.5 at.% C having nearly lamellar microstructure, enhanced amount of alpha2 phase, without beta phase and exhibiting the highest strength. No positive effect of combined Mo and C addition on mechanical properties was identified. Fractographic observations revealed that the major fracture mode in all alloys was trans-lamellar. Inter-lamellar fracture was observed occasionally and mainly in C containing alloys.

Název v anglickém jazyce

Mechanical properties of high niobium TiAl alloys doped with Mo and C

Popis výsledku anglicky

Effects of alloying elements (i.e., variable content of Mo and C) on the microstructure and mechanical properties of five types of experimental material based on TiAl alloy containing 7 at.% Nb were investigated. Mechanical properties (tensile, compression and fatigue) at room and at elevated temperatures were evaluated. Addition of Mo and/or C resulted in different phase compositions and three typical microstructures. To judge the effect of alloying on the microstructure the comparison with reference TiAl alloy with 7 at.% Nb without C and Mo addition was used. Evaluation of mechanical properties of individual alloys revealed two most promising variants: (i) alloy with 2 at.% Mo containing beta phase, having mixed microstructure and exhibiting the highest ductility, (ii) alloy with 0.5 at.% C having nearly lamellar microstructure, enhanced amount of alpha2 phase, without beta phase and exhibiting the highest strength. No positive effect of combined Mo and C addition on mechanical properties was identified. Fractographic observations revealed that the major fracture mode in all alloys was trans-lamellar. Inter-lamellar fracture was observed occasionally and mainly in C containing alloys.

Druh

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

CEP obor

JL - Únava materiálu a lomová mechanika

OECD FORD obor

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Projekt

Výsledek vznikl pri realizaci vícero projektů. Více informací v záložce Projekty.

Návaznosti

I - Institucionalni podpora na dlouhodoby koncepcni rozvoj vyzkumne organizace

Rok uplatnění

2016

Kód důvěrnosti údajů

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

Název periodika

Materials and Design

ISSN

0264-1275

e-ISSN

—

Svazek periodika

99

Číslo periodika v rámci svazku

JUN

Stát vydavatele periodika

GB - Spojené království Velké Británie a Severního Irska

Počet stran výsledku

9

Strana od-do

284-294

Kód UT WoS článku

000375356700032

EID výsledku v databázi Scopus

2-s2.0-84961784516