New transformation mechanism of TiB from Bf to B27 structure in β-solidified TiAl alloys

Songkuan Zhao; Bin Tang; Beibei Wei; Lei Zhu; Jinshan Li

doi:10.1080/21663831.2026.2621085

New transformation mechanism of TiB from B_f to B27 structure in β-solidified TiAl alloys

Songkuan Zhao
, Bin Tang
, Beibei Wei
, Lei Zhu
, Jinshan Li

School of Materials Sience and Engineering

Northwestern Polytechnical University Xian
Xi'an University of Technology

Research output: Contribution to journal › Article › peer-review

Abstract

Both transformations of structure and morphology occur on the borides formed in β-solidified TiAl alloys during heat treatment at 1300℃. Flake-like TiB(B_f) transforms to blocky TiB(B27). Two types of planar faults in B_f occur during transformation, respectively on (010) and {110) plane. Displacement on {110) B_f directly realizes the transformation, and the driving force originates from the shear stress caused by the lattice distortion of a new (Ti, Al, B) structure. This new structure is generated because Al atoms occupy the interstitial sites in a three-layer structure formed due to the stacking faults on (010) B_f.

Original language	English
Pages (from-to)	412-418
Number of pages	7
Journal	Materials Research Letters
Volume	14
Issue number	4
DOIs	https://doi.org/10.1080/21663831.2026.2621085
State	Published - 2026

Keywords

TiAl alloy
boride
phase transformation
planar fault

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10.1080/21663831.2026.2621085

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title = "New transformation mechanism of TiB from Bf to B27 structure in β-solidified TiAl alloys",

abstract = "Both transformations of structure and morphology occur on the borides formed in β-solidified TiAl alloys during heat treatment at 1300℃. Flake-like TiB(Bf) transforms to blocky TiB(B27). Two types of planar faults in Bf occur during transformation, respectively on (010) and \{110) plane. Displacement on \{110) Bf directly realizes the transformation, and the driving force originates from the shear stress caused by the lattice distortion of a new (Ti, Al, B) structure. This new structure is generated because Al atoms occupy the interstitial sites in a three-layer structure formed due to the stacking faults on (010) Bf.",

keywords = "TiAl alloy, boride, phase transformation, planar fault",

author = "Songkuan Zhao and Bin Tang and Beibei Wei and Lei Zhu and Jinshan Li",

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year = "2026",

doi = "10.1080/21663831.2026.2621085",

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T1 - New transformation mechanism of TiB from Bf to B27 structure in β-solidified TiAl alloys

AU - Zhao, Songkuan

AU - Tang, Bin

AU - Wei, Beibei

AU - Zhu, Lei

AU - Li, Jinshan

PY - 2026

Y1 - 2026

N2 - Both transformations of structure and morphology occur on the borides formed in β-solidified TiAl alloys during heat treatment at 1300℃. Flake-like TiB(Bf) transforms to blocky TiB(B27). Two types of planar faults in Bf occur during transformation, respectively on (010) and {110) plane. Displacement on {110) Bf directly realizes the transformation, and the driving force originates from the shear stress caused by the lattice distortion of a new (Ti, Al, B) structure. This new structure is generated because Al atoms occupy the interstitial sites in a three-layer structure formed due to the stacking faults on (010) Bf.

AB - Both transformations of structure and morphology occur on the borides formed in β-solidified TiAl alloys during heat treatment at 1300℃. Flake-like TiB(Bf) transforms to blocky TiB(B27). Two types of planar faults in Bf occur during transformation, respectively on (010) and {110) plane. Displacement on {110) Bf directly realizes the transformation, and the driving force originates from the shear stress caused by the lattice distortion of a new (Ti, Al, B) structure. This new structure is generated because Al atoms occupy the interstitial sites in a three-layer structure formed due to the stacking faults on (010) Bf.

KW - TiAl alloy

KW - boride

KW - phase transformation

KW - planar fault

UR - https://www.scopus.com/pages/publications/105029233991

U2 - 10.1080/21663831.2026.2621085

DO - 10.1080/21663831.2026.2621085

M3 - 文章

AN - SCOPUS:105029233991

SN - 2166-3831

VL - 14

SP - 412

EP - 418

JO - Materials Research Letters

JF - Materials Research Letters

IS - 4

ER -

New transformation mechanism of TiB from B_f to B27 structure in β-solidified TiAl alloys

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