TY - JOUR
T1 - Evidence of an orthorhombic transition phase in a Ti-44Al-3Mo (at.%) alloy using in situ synchrotron diffraction and transmission electron microscopy
AU - Musi, Michael
AU - Erdely, Petra
AU - Rashkova, Boryana
AU - Clemens, Helmut
AU - Stark, Andreas
AU - Staron, Peter
AU - Schell, Norbert
AU - Mayer, Svea
PY - 2019/1
Y1 - 2019/1
N2 - Alloying of a binary system with an additional element often leads to the formation of new phases. In this work, a γ-TiAl based alloy with 3 at.% molybdenum was investigated, which was quenched from 1450 °C. Upon reheating, the formation of an orthorhombic phase was observed with the help of in situ high-energy X-ray diffraction. This phase formed at 600 °C and vanished again at 720 °C, and acts as a transition phase between the α
2 and the γ phase. Such a transition phase has not been observed before in this type of alloy. Additionally, transmission electron microscopy was used to study the microstructure of selected sample states on a sub-micrometer level. The orthorhombic phase formed fine lamellae inside the α
2 phase and the α
2 ′ martensite.
AB - Alloying of a binary system with an additional element often leads to the formation of new phases. In this work, a γ-TiAl based alloy with 3 at.% molybdenum was investigated, which was quenched from 1450 °C. Upon reheating, the formation of an orthorhombic phase was observed with the help of in situ high-energy X-ray diffraction. This phase formed at 600 °C and vanished again at 720 °C, and acts as a transition phase between the α
2 and the γ phase. Such a transition phase has not been observed before in this type of alloy. Additionally, transmission electron microscopy was used to study the microstructure of selected sample states on a sub-micrometer level. The orthorhombic phase formed fine lamellae inside the α
2 phase and the α
2 ′ martensite.
UR - https://www.scopus.com/pages/publications/85057220719
U2 - 10.1016/j.matchar.2018.11.025
DO - 10.1016/j.matchar.2018.11.025
M3 - Article
SN - 1044-5803
VL - 147.2019
SP - 398
EP - 405
JO - Materials characterization
JF - Materials characterization
IS - January
ER -