TY - JOUR
T1 - The microstructure evolution and tensile properties of Ti–43Al–4Nb–1Mo-0.2B alloy during hot rolling
AU - Wei, Beibei
AU - Tang, Bin
AU - Chu, Yudong
AU - Du, Lihua
AU - Chen, Xiaofei
AU - Zhu, Lei
AU - Li, Jinshan
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2022/12/19
Y1 - 2022/12/19
N2 - Ti–43Al–4Nb–1Mo-0.2B (at.%) (TNM) alloy sheets were fabricated, and the corresponding microstructure developed from lamellar to duplex structure with the rolling reduction increased from 50% to 72.5%. Interestingly, a novel Z-type lamellar structure developed at 67.5% deformation strain, and the formation process was discussed by calculating the Schmid factor. Moreover, α2+γ→βo phase transformation occurred at the kink band boundaries. Subsequently, as the reduction increased to 72.5%, the coarse βo phase decomposed and transformed to α2+γ phases due to the distortion energy stored after multi-pass rolling. Finally, the room-temperature tensile properties of the TNM sheets were tested. With the comparison of the as-forged alloy, the strength and ductility increased significantly by hot rolling, and the ultimate tensile strength reached 880 MPa at 60% total reduction. The relationship between the rolling process, microstructure evolution, and corresponding properties was established.
AB - Ti–43Al–4Nb–1Mo-0.2B (at.%) (TNM) alloy sheets were fabricated, and the corresponding microstructure developed from lamellar to duplex structure with the rolling reduction increased from 50% to 72.5%. Interestingly, a novel Z-type lamellar structure developed at 67.5% deformation strain, and the formation process was discussed by calculating the Schmid factor. Moreover, α2+γ→βo phase transformation occurred at the kink band boundaries. Subsequently, as the reduction increased to 72.5%, the coarse βo phase decomposed and transformed to α2+γ phases due to the distortion energy stored after multi-pass rolling. Finally, the room-temperature tensile properties of the TNM sheets were tested. With the comparison of the as-forged alloy, the strength and ductility increased significantly by hot rolling, and the ultimate tensile strength reached 880 MPa at 60% total reduction. The relationship between the rolling process, microstructure evolution, and corresponding properties was established.
KW - Mechanical properties
KW - Microstructure evolution
KW - Phase transformation
KW - TNM sheets
UR - http://www.scopus.com/inward/record.url?scp=85142460583&partnerID=8YFLogxK
U2 - 10.1016/j.msea.2022.144347
DO - 10.1016/j.msea.2022.144347
M3 - 文章
AN - SCOPUS:85142460583
SN - 0921-5093
VL - 861
JO - Materials Science and Engineering: A
JF - Materials Science and Engineering: A
M1 - 144347
ER -