Micro-compression of high oxygen doped single-crystal titanium along different orientations

Xiuxia Wang; Siyu Lu; Biao Chen; Umeda Junko; Yoji Shibutani; Katsuyoshi Kondoh; Jianghua Shen

doi:10.1016/j.msea.2021.142449

Micro-compression of high oxygen doped single-crystal titanium along different orientations

Xiuxia Wang, Siyu Lu, Biao Chen, Umeda Junko, Yoji Shibutani, Katsuyoshi Kondoh, Jianghua Shen

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

11 Scopus citations

Abstract

To explore the deformation mechanism of α-Ti with high oxygen doping, micro-pillars of single crystal with orientations of near 0°, 45°, and 90° inclined to c-axis were fabricated via focused ion beam (FIB) milling from a high oxygen content commercial purity Ti (CP–Ti). The micro-pillars were loaded under quasi-static compression. Post-mortem analysis reveals that only prismatic slip activated for 45° and 90° oriented samples with their critical resolved shear stress (CRSS) values of about 457 MPa and 596 MPa, and only {10–11}<c+a> the first-order pyramidal slip activated on the 0° sample with a CRSS of around 1019 MPa. The results suggest that the oxygen addition remarkably reduces the CRSS ratio between non-prismatic and prismatic slips of α-Ti. In addition, the results indicate that the Schmid law may not be applicable for α-Ti single crystal at micro-size level.

Original language	English
Article number	142449
Journal	Materials Science and Engineering: A
Volume	832
DOIs	https://doi.org/10.1016/j.msea.2021.142449
State	Published - 14 Jan 2022

Keywords

Critical resolved shear stress
High oxygen content
Micro-pillars
Slip system
Titanium

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10.1016/j.msea.2021.142449

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title = "Micro-compression of high oxygen doped single-crystal titanium along different orientations",

abstract = "To explore the deformation mechanism of α-Ti with high oxygen doping, micro-pillars of single crystal with orientations of near 0°, 45°, and 90° inclined to c-axis were fabricated via focused ion beam (FIB) milling from a high oxygen content commercial purity Ti (CP–Ti). The micro-pillars were loaded under quasi-static compression. Post-mortem analysis reveals that only prismatic slip activated for 45° and 90° oriented samples with their critical resolved shear stress (CRSS) values of about 457 MPa and 596 MPa, and only {10–11} the first-order pyramidal slip activated on the 0° sample with a CRSS of around 1019 MPa. The results suggest that the oxygen addition remarkably reduces the CRSS ratio between non-prismatic and prismatic slips of α-Ti. In addition, the results indicate that the Schmid law may not be applicable for α-Ti single crystal at micro-size level.",

keywords = "Critical resolved shear stress, High oxygen content, Micro-pillars, Slip system, Titanium",

author = "Xiuxia Wang and Siyu Lu and Biao Chen and Umeda Junko and Yoji Shibutani and Katsuyoshi Kondoh and Jianghua Shen",

note = "Publisher Copyright: {\textcopyright} 2021",

year = "2022",

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doi = "10.1016/j.msea.2021.142449",

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T1 - Micro-compression of high oxygen doped single-crystal titanium along different orientations

AU - Wang, Xiuxia

AU - Lu, Siyu

AU - Chen, Biao

AU - Junko, Umeda

AU - Shibutani, Yoji

AU - Kondoh, Katsuyoshi

AU - Shen, Jianghua

PY - 2022/1/14

Y1 - 2022/1/14

N2 - To explore the deformation mechanism of α-Ti with high oxygen doping, micro-pillars of single crystal with orientations of near 0°, 45°, and 90° inclined to c-axis were fabricated via focused ion beam (FIB) milling from a high oxygen content commercial purity Ti (CP–Ti). The micro-pillars were loaded under quasi-static compression. Post-mortem analysis reveals that only prismatic slip activated for 45° and 90° oriented samples with their critical resolved shear stress (CRSS) values of about 457 MPa and 596 MPa, and only {10–11} the first-order pyramidal slip activated on the 0° sample with a CRSS of around 1019 MPa. The results suggest that the oxygen addition remarkably reduces the CRSS ratio between non-prismatic and prismatic slips of α-Ti. In addition, the results indicate that the Schmid law may not be applicable for α-Ti single crystal at micro-size level.

AB - To explore the deformation mechanism of α-Ti with high oxygen doping, micro-pillars of single crystal with orientations of near 0°, 45°, and 90° inclined to c-axis were fabricated via focused ion beam (FIB) milling from a high oxygen content commercial purity Ti (CP–Ti). The micro-pillars were loaded under quasi-static compression. Post-mortem analysis reveals that only prismatic slip activated for 45° and 90° oriented samples with their critical resolved shear stress (CRSS) values of about 457 MPa and 596 MPa, and only {10–11} the first-order pyramidal slip activated on the 0° sample with a CRSS of around 1019 MPa. The results suggest that the oxygen addition remarkably reduces the CRSS ratio between non-prismatic and prismatic slips of α-Ti. In addition, the results indicate that the Schmid law may not be applicable for α-Ti single crystal at micro-size level.

KW - Critical resolved shear stress

KW - High oxygen content

KW - Micro-pillars

KW - Slip system

KW - Titanium

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U2 - 10.1016/j.msea.2021.142449

DO - 10.1016/j.msea.2021.142449

M3 - 文章

AN - SCOPUS:85120628995

SN - 0921-5093

VL - 832

JO - Materials Science and Engineering: A

JF - Materials Science and Engineering: A

M1 - 142449

ER -

Micro-compression of high oxygen doped single-crystal titanium along different orientations

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Keywords

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