Stress-induced phase transformation and phase boundary sliding in Ti: An atomically resolved in-situ analysis

Zongde Kou; Xuteng Li; Rong Huang; Lixia Yang; Yanqing Yang; Tao Feng; Si Lan; Gerhard Wilde; Qingquan Lai; Song Tang

doi:10.1016/j.jmst.2022.12.029

Stress-induced phase transformation and phase boundary sliding in Ti: An atomically resolved in-situ analysis

Zongde Kou, Xuteng Li, Rong Huang, Lixia Yang, Yanqing Yang, Tao Feng, Si Lan, Gerhard Wilde, Qingquan Lai, Song Tang

School of Materials Sience and Engineering

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

5 Scopus citations

Abstract

In-situ tensile experiments on pure Ti were performed in a transmission electron microscope at room temperature. The dynamic process of stress-induced hexagonal closed-packed (hcp) to face-centered cubic (fcc) structural transformation ahead of a crack tip was captured at the atomic level. Intriguingly, a sliding behavior of the ensuing (0001)_hcp/(11¯1)_fcc phase boundary was observed to further accommodate the plastic deformation until crack initiation. The sliding was accomplished via the successive conservative glide of extended dislocations along the (0001)_hcp/(11¯1)_fcc phase boundary. A molecular dynamics simulation was carried out to corroborate the experiments and the results confirm the new dislocation-mediated sliding mechanism.

Original language	English
Pages (from-to)	30-36
Number of pages	7
Journal	Journal of Materials Science and Technology
Volume	152
DOIs	https://doi.org/10.1016/j.jmst.2022.12.029
State	Published - 20 Jul 2023

Keywords

Hcp-to-fcc transformation
In situ HRTEM
Molecular dynamics simulation
Phase boundary sliding
Pure Ti

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10.1016/j.jmst.2022.12.029

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title = "Stress-induced phase transformation and phase boundary sliding in Ti: An atomically resolved in-situ analysis",

abstract = "In-situ tensile experiments on pure Ti were performed in a transmission electron microscope at room temperature. The dynamic process of stress-induced hexagonal closed-packed (hcp) to face-centered cubic (fcc) structural transformation ahead of a crack tip was captured at the atomic level. Intriguingly, a sliding behavior of the ensuing (0001)hcp/(11¯1)fcc phase boundary was observed to further accommodate the plastic deformation until crack initiation. The sliding was accomplished via the successive conservative glide of extended dislocations along the (0001)hcp/(11¯1)fcc phase boundary. A molecular dynamics simulation was carried out to corroborate the experiments and the results confirm the new dislocation-mediated sliding mechanism.",

keywords = "Hcp-to-fcc transformation, In situ HRTEM, Molecular dynamics simulation, Phase boundary sliding, Pure Ti",

author = "Zongde Kou and Xuteng Li and Rong Huang and Lixia Yang and Yanqing Yang and Tao Feng and Si Lan and Gerhard Wilde and Qingquan Lai and Song Tang",

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doi = "10.1016/j.jmst.2022.12.029",

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T1 - Stress-induced phase transformation and phase boundary sliding in Ti

T2 - An atomically resolved in-situ analysis

AU - Kou, Zongde

AU - Li, Xuteng

AU - Huang, Rong

AU - Yang, Lixia

AU - Yang, Yanqing

AU - Feng, Tao

AU - Lan, Si

AU - Wilde, Gerhard

AU - Lai, Qingquan

AU - Tang, Song

PY - 2023/7/20

Y1 - 2023/7/20

N2 - In-situ tensile experiments on pure Ti were performed in a transmission electron microscope at room temperature. The dynamic process of stress-induced hexagonal closed-packed (hcp) to face-centered cubic (fcc) structural transformation ahead of a crack tip was captured at the atomic level. Intriguingly, a sliding behavior of the ensuing (0001)hcp/(11¯1)fcc phase boundary was observed to further accommodate the plastic deformation until crack initiation. The sliding was accomplished via the successive conservative glide of extended dislocations along the (0001)hcp/(11¯1)fcc phase boundary. A molecular dynamics simulation was carried out to corroborate the experiments and the results confirm the new dislocation-mediated sliding mechanism.

AB - In-situ tensile experiments on pure Ti were performed in a transmission electron microscope at room temperature. The dynamic process of stress-induced hexagonal closed-packed (hcp) to face-centered cubic (fcc) structural transformation ahead of a crack tip was captured at the atomic level. Intriguingly, a sliding behavior of the ensuing (0001)hcp/(11¯1)fcc phase boundary was observed to further accommodate the plastic deformation until crack initiation. The sliding was accomplished via the successive conservative glide of extended dislocations along the (0001)hcp/(11¯1)fcc phase boundary. A molecular dynamics simulation was carried out to corroborate the experiments and the results confirm the new dislocation-mediated sliding mechanism.

KW - Hcp-to-fcc transformation

KW - In situ HRTEM

KW - Molecular dynamics simulation

KW - Phase boundary sliding

KW - Pure Ti

UR - http://www.scopus.com/inward/record.url?scp=85148692686&partnerID=8YFLogxK

U2 - 10.1016/j.jmst.2022.12.029

DO - 10.1016/j.jmst.2022.12.029

M3 - 文章

AN - SCOPUS:85148692686

SN - 1005-0302

VL - 152

SP - 30

EP - 36

JO - Journal of Materials Science and Technology

JF - Journal of Materials Science and Technology

ER -

Stress-induced phase transformation and phase boundary sliding in Ti: An atomically resolved in-situ analysis

Abstract

Keywords

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