Fracture toughness of a lamellar orientation-controlled TiAl-based alloy processed by either one-step or two-step compression at high temperature
Identifikátory výsledku
Kód výsledku v IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F00216305%3A26210%2F18%3APU140278" target="_blank" >RIV/00216305:26210/18:PU140278 - isvavai.cz</a>
Nalezeny alternativní kódy
RIV/68081723:_____/18:00494647
Výsledek na webu
<a href="https://www.sciencedirect.com/science/article/pii/S0921509318302995?via%3Dihub" target="_blank" >https://www.sciencedirect.com/science/article/pii/S0921509318302995?via%3Dihub</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.1016/j.msea.2018.02.079" target="_blank" >10.1016/j.msea.2018.02.079</a>
Alternativní jazyky
Jazyk výsledku
angličtina
Název v původním jazyce
Fracture toughness of a lamellar orientation-controlled TiAl-based alloy processed by either one-step or two-step compression at high temperature
Popis výsledku v původním jazyce
In this work, the effects of lamellae orientation and the distribution of fine grains and fine lamellar colonies on the fracture toughness of orientation-controlled Ti-43 mol%Al alloy were examined. Fracture toughness was determined by three-point bending tests following the introduction of a chevron notch, and thermomechanical processing to control lamellar orientation consisted of high temperature compression in the a single-phase and (alpha + gamma) two-phase regions. Materials processed via one-step compression in the a single-phase region exhibited tilting of the lamellae interface by approximately 20-30 degrees relative to the compression plane. Further compression in the (alpha + gamma) two-phase region (termed two-step compression) arranged the lamellae interface nearly parallel to the compression plane. Fine grains were also observed around the orientation-controlled lamellar colonies, and were converted into fine lamellar colonies during heat treatment following processing in the (alpha + gamma) two-phase region. The proportion of fine grains decreased with an increase in the true strain rate during compression in the (alpha + gamma) two-phase region. Specimens processed by one-step compression had fracture toughness values lower than those of two-step compression specimens. In addition, specimens processed using two-step compression and exhibiting a crack arrester orientation had higher fracture toughness values than those with a crack divider orientation. The fine grains and colonies formed at the lamellar colony boundaries were found not to affect the fracture toughness of specimens with either of these crack orientations. However, decreased quantities of fine grains and colonies may increase the toughness of specimens for which crack propagation occurs in conjunction with crack arrester orientation.
Název v anglickém jazyce
Fracture toughness of a lamellar orientation-controlled TiAl-based alloy processed by either one-step or two-step compression at high temperature
Popis výsledku anglicky
In this work, the effects of lamellae orientation and the distribution of fine grains and fine lamellar colonies on the fracture toughness of orientation-controlled Ti-43 mol%Al alloy were examined. Fracture toughness was determined by three-point bending tests following the introduction of a chevron notch, and thermomechanical processing to control lamellar orientation consisted of high temperature compression in the a single-phase and (alpha + gamma) two-phase regions. Materials processed via one-step compression in the a single-phase region exhibited tilting of the lamellae interface by approximately 20-30 degrees relative to the compression plane. Further compression in the (alpha + gamma) two-phase region (termed two-step compression) arranged the lamellae interface nearly parallel to the compression plane. Fine grains were also observed around the orientation-controlled lamellar colonies, and were converted into fine lamellar colonies during heat treatment following processing in the (alpha + gamma) two-phase region. The proportion of fine grains decreased with an increase in the true strain rate during compression in the (alpha + gamma) two-phase region. Specimens processed by one-step compression had fracture toughness values lower than those of two-step compression specimens. In addition, specimens processed using two-step compression and exhibiting a crack arrester orientation had higher fracture toughness values than those with a crack divider orientation. The fine grains and colonies formed at the lamellar colony boundaries were found not to affect the fracture toughness of specimens with either of these crack orientations. However, decreased quantities of fine grains and colonies may increase the toughness of specimens for which crack propagation occurs in conjunction with crack arrester orientation.
Klasifikace
Druh
J<sub>imp</sub> - Článek v periodiku v databázi Web of Science
CEP obor
—
OECD FORD obor
20501 - Materials engineering
Návaznosti výsledku
Projekt
<a href="/cs/project/GA17-13573S" target="_blank" >GA17-13573S: Kovové materiály s vnitřní architekturou strukturované pro studenou kinetizaci</a><br>
Návaznosti
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)
Ostatní
Rok uplatnění
2018
Kód důvěrnosti údajů
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů
Údaje specifické pro druh výsledku
Název periodika
MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROST
ISSN
0921-5093
e-ISSN
1873-4936
Svazek periodika
721
Číslo periodika v rámci svazku
4
Stát vydavatele periodika
CH - Švýcarská konfederace
Počet stran výsledku
8
Strana od-do
303-310
Kód UT WoS článku
000430763300033
EID výsledku v databázi Scopus
2-s2.0-85042859587