Glide and mixed climb dislocation velocity in γ-TiAl investigated by in-situ transmission electron microscopy
Research output: Contribution to journal › Article › Research › peer-review
Standard
In: Scripta materialia, Vol. 228.2023, No. 15 April, 115333, 15.04.2023.
Research output: Contribution to journal › Article › Research › peer-review
Harvard
APA
Vancouver
Author
Bibtex - Download
}
RIS (suitable for import to EndNote) - Download
TY - JOUR
T1 - Glide and mixed climb dislocation velocity in γ-TiAl investigated by in-situ transmission electron microscopy
AU - Galy, Benjamin
AU - Musi, Michael
AU - Hantcherli, Muriel
AU - Molénat, Guy
AU - Couret, Alain
AU - Spörk-Erdely, Petra
AU - Clemens, Helmut
AU - Monchoux, Jean-Philippe
N1 - Publisher Copyright: © 2023
PY - 2023/4/15
Y1 - 2023/4/15
N2 - Dislocation velocities at high temperatures in metallic systems are believed in literature to be different for glide and climb, the values being bigger in case of glide. However, this has not been experimentally established. Therefore, in this study, dislocation velocities were measured with simultaneous determination of the corresponding mechanism (glide or mixed climb). For this purpose, coupled experiments of measurements of dislocation velocities by in-situ TEM investigations and of determination of movement planes by stereographic analyses have been carried out at 770–790 °C in the γ phase of an intermetallic Ti-48.4Al-0.1B (at.%) alloy. Mixed climb and pure glide mechanisms have thus been identified, both leading to dislocation velocities in the same order of magnitude (in the 0.5–5 nm/s range), showing that within a transition temperature domain, mixed climb can reach the velocity of glide.
AB - Dislocation velocities at high temperatures in metallic systems are believed in literature to be different for glide and climb, the values being bigger in case of glide. However, this has not been experimentally established. Therefore, in this study, dislocation velocities were measured with simultaneous determination of the corresponding mechanism (glide or mixed climb). For this purpose, coupled experiments of measurements of dislocation velocities by in-situ TEM investigations and of determination of movement planes by stereographic analyses have been carried out at 770–790 °C in the γ phase of an intermetallic Ti-48.4Al-0.1B (at.%) alloy. Mixed climb and pure glide mechanisms have thus been identified, both leading to dislocation velocities in the same order of magnitude (in the 0.5–5 nm/s range), showing that within a transition temperature domain, mixed climb can reach the velocity of glide.
UR - http://www.scopus.com/inward/record.url?scp=85147428058&partnerID=8YFLogxK
U2 - 10.1016/j.scriptamat.2023.115333
DO - 10.1016/j.scriptamat.2023.115333
M3 - Article
VL - 228.2023
JO - Scripta materialia
JF - Scripta materialia
SN - 1359-6462
IS - 15 April
M1 - 115333
ER -