Effect of initial texture on microstructure evolution of Ti-2Al-2.5Zr alloy tubes in multi-pass cold Pilger rolling process

WU Jingyi; FAN Yutian; XING Yuan; WANG Ying; LUAN Baifeng

doi:10.7513/j.issn.1004-7638.2025.05.018

Volume 46 Issue 5

Oct. 2025

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WU Jingyi, FAN Yutian, XING Yuan, WANG Ying, LUAN Baifeng. Effect of initial texture on microstructure evolution of Ti-2Al-2.5Zr alloy tubes in multi-pass cold Pilger rolling process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(5): 170-176. doi: 10.7513/j.issn.1004-7638.2025.05.018

Citation:

WU Jingyi, FAN Yutian, XING Yuan, WANG Ying, LUAN Baifeng. Effect of initial texture on microstructure evolution of Ti-2Al-2.5Zr alloy tubes in multi-pass cold Pilger rolling process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(5): 170-176. doi: 10.7513/j.issn.1004-7638.2025.05.018

Citation:

WU Jingyi, FAN Yutian, XING Yuan, WANG Ying, LUAN Baifeng. Effect of initial texture on microstructure evolution of Ti-2Al-2.5Zr alloy tubes in multi-pass cold Pilger rolling process[J]. IRON STEEL VANADIUM TITANIUM, 2025, 46(5): 170-176. doi: 10.7513/j.issn.1004-7638.2025.05.018

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Effect of initial texture on microstructure evolution of Ti-2Al-2.5Zr alloy tubes in multi-pass cold Pilger rolling process

doi: 10.7513/j.issn.1004-7638.2025.05.018

WU Jingyi^{1, 2
,},
FAN Yutian^{1, 2, 3},
XING Yuan^{1
,
,},
WANG Ying¹,
LUAN Baifeng²

1.
Pangang Group Co., Ltd., Panzhihua 617000, Sichuan, China
2.
Chongqing University, School of Materials Science and Engineering, Chongqing 400044, China
3.
Chengdu Advanced Metal Materials Industrial Technology Research Institute Co., Ltd., Chengdu 610399, Sichuan, China

More Information

Received Date: 2025-03-24
Accepted Date: 2025-04-14
Rev Recd Date: 2025-04-09
Publish Date: 2025-10-30

Abstract

Abstract

Pilger cold rolling is a good technique for manufacturing hard-to-distort tubes. However, the complex thermal loading history of multi-pass cold rolling combined with heat treatment has resulted in significant inhomogeneous tube deformation in cold rolling, leading to complex patterns of tube texture evolution. This study investigated the microstructural evolution and deformation mechanism of two types of Ti-2Al-2.5Zr alloy billets with different initial textures, produced by hot-rolled and precision-forged, during the three-pass Pilger cold rolling process. Through microstructural analysis, pole figures and inverse pole figures characterization, as well as calculations of the Kearns factor and Schmid factor (SF), the influence of different initial textures on the microstructural evolution during the cold rolling of seamless tubes was examined. The results show that after three passes of cold rolling, the grain sizes of the microstructures in both hot-rolled and precision-forged billets are similar, exhibiting equiaxed grains. During the cold rolling process, prismatic slip and pyramidal <c+a> slip are significantly activated, with the pyramidal <c+a> slip being confirmed as the primary deformation mechanism affecting the radial grain intensity in cold rolling. Variations in the Q-value lead to the tilting of the c-axes of the grains between the transverse direction (TD) and the radial direction (RD). The precision-forged billet, which has a higher initial radial texture intensity (f_RD), exhibites a stronger radial texture after cold rolling. This study provides a theoretical basis for optimizing texture control of titanium alloy tubes.
- Ti-2Al-2.5Zr alloy,
- Pilger cold rolling,
- texture,
- deformation mechanism

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References(14)

References

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