TY - JOUR

T1 - A TEM study of a dislocations in the ßo phase of an intermetallic TNM-TiAl alloy

AU - Molénat, Guy

AU - Monchoux, Jean-Philippe

AU - Musi, Michael

AU - Spörk-Erdely, Petra

AU - Clemens, Helmut

AU - Couret, Alain

N1 - Publisher Copyright: © 2022

PY - 2023/3/15

Y1 - 2023/3/15

N2 - The structure and mobility of a<001> dislocations in the β o phase of an intermetallic TNM-TiAl alloy produced by Spark Plasma Sintering were investigated by transmission electron microscopy. We find that these dislocations are dissociated into two identical superpartial dislocations separated by a stacking fault. Furthermore, a<001> dislocations are elongated along their screw orientation and anchored at small pining points assumed to be nano-sized precipitates of the ω o phase. In situ room temperature straining experiments show that dislocation propagation occurs through jumps between these elongated configurations.

AB - The structure and mobility of a<001> dislocations in the β o phase of an intermetallic TNM-TiAl alloy produced by Spark Plasma Sintering were investigated by transmission electron microscopy. We find that these dislocations are dissociated into two identical superpartial dislocations separated by a stacking fault. Furthermore, a<001> dislocations are elongated along their screw orientation and anchored at small pining points assumed to be nano-sized precipitates of the ω o phase. In situ room temperature straining experiments show that dislocation propagation occurs through jumps between these elongated configurations.

UR - http://www.scopus.com/inward/record.url?scp=85145571431&partnerID=8YFLogxK

U2 - 10.1016/j.scriptamat.2022.115247

DO - 10.1016/j.scriptamat.2022.115247

M3 - Article

VL - 226.2023

JO - Scripta materialia

JF - Scripta materialia

SN - 1359-6462

IS - 15 March

M1 - 115247

ER -