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@ARTICLE{Liu:645087,
author = {Liu, Shen and Liu, Xu and Wu, Qiaohan and Li, Yixuan and
Shi, Qiuyi and Song, Lin and Pyczak, Florian and Stark,
Andreas and Li, Xiaobing and Zhang, Tiebang},
title = {{I}n-situ synchrotron high energy {X}-ray diffraction study
on the internal strain evolution of an extruded
{T}i-45{A}l-8{N}b-0.2{C} alloy during high-temperature
compression},
journal = {Materials characterization},
volume = {230},
issn = {1044-5803},
address = {New York, NY},
publisher = {Science Direct},
reportid = {PUBDB-2026-00592},
pages = {115746},
year = {2025},
abstract = {Due to their exceptional properties, γ-TiAl based alloys
present substantial prospect for aerospace and
automotiveapplications. However, the significant disparity
in plasticity between the D019-α2 and L10-γ phases
greatlyaffects TiAl alloys’ service behavior. This study
investigates the internal strain accumulation in the α2 and
γphases of an extruded Ti-45Al-8Nb-0.2C alloy during
compression at 900 ◦C and the subsequent stress
relaxationbehavior during annealing at 850 ◦C, using in
situ synchrotron high-energy X-ray diffraction (HEXRD).
Duringcompression, the γ phase starts to yield plastically
at approximately 410 MPa true stress, progressively
shiftingthe load to the α2 phase and generating high
residual stress in the α2 phase after deformation.
However,annealing at 850 ◦C for 30 min only partially
relieves the residual stress in the α2 phase, with the
relaxation ratedecreasing substantially after the first 10
min. Furthermore, when the true stress reaches 790 MPa
duringcompression, the α2 phase undergoes rigid-body
rotation to accommodate the plastic deformation of the
adjacentγ phase, initiating texture evolution that
ultimately forms a distinct < 1120 > fiber texture.},
cin = {DOOR ; HAS-User / Hereon},
ddc = {670},
cid = {I:(DE-H253)HAS-User-20120731 / I:(DE-H253)Hereon-20210428},
pnm = {6G3 - PETRA III (DESY) (POF4-6G3)},
pid = {G:(DE-HGF)POF4-6G3},
experiment = {EXP:(DE-H253)P-P07-20150101},
typ = {PUB:(DE-HGF)16},
doi = {10.1016/j.matchar.2025.115746},
url = {https://bib-pubdb1.desy.de/record/645087},
}