A TEM study of a dislocations in the ßo phase of an intermetallic TNM-TiAl alloy
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In: Scripta materialia, Vol. 226.2023, No. 15 March, 115247, 15.03.2023.
Research output: Contribution to journal › Article › Research › peer-review
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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 -