Influences of microstructures and macrozones on the stress corrosion cracking sensitivity of a near alpha titanium alloy

Yali Xu; Xinjie Zhang; Xiaoyang Lu; Shuaifeng Zhang; Zhijie Sun; Fuyang Gao; Jinshan Li; Minjie Lai

doi:10.1016/j.corsci.2024.112015

Influences of microstructures and macrozones on the stress corrosion cracking sensitivity of a near alpha titanium alloy

Yali Xu, Xinjie Zhang, Xiaoyang Lu, Shuaifeng Zhang, Zhijie Sun, Fuyang Gao, Jinshan Li, Minjie Lai

School of Materials Sience and Engineering

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

5 Scopus citations

Abstract

In this study, we investigated stress corrosion cracking (SCC) behaviors in a near alpha titanium alloy (Ti-6Al-3Nb-2Zr-1Mo) with distinct microstructures and microtextures. By analyzing fracture surfaces, crack growth paths, and grain orientations, we found that the SCC crack growth rate increased with an increase in the volume fraction of the primary α_p phase, due to elevated crack initiation density and concentrated grain orientations. Additionally, SCC cracks exhibited a preference for propagating along boundaries between neighboring soft macrozones (easy for slip) and hard macrozones (relatively hard for slip), as well as through macrozones favorable for slip.

Original language	English
Article number	112015
Journal	Corrosion Science
Volume	232
DOIs	https://doi.org/10.1016/j.corsci.2024.112015
State	Published - 15 May 2024

Keywords

A- titanium
B- SEM
C- hydrogen embrittlement
C- stress corrosion

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10.1016/j.corsci.2024.112015

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title = "Influences of microstructures and macrozones on the stress corrosion cracking sensitivity of a near alpha titanium alloy",

abstract = "In this study, we investigated stress corrosion cracking (SCC) behaviors in a near alpha titanium alloy (Ti-6Al-3Nb-2Zr-1Mo) with distinct microstructures and microtextures. By analyzing fracture surfaces, crack growth paths, and grain orientations, we found that the SCC crack growth rate increased with an increase in the volume fraction of the primary αp phase, due to elevated crack initiation density and concentrated grain orientations. Additionally, SCC cracks exhibited a preference for propagating along boundaries between neighboring soft macrozones (easy for slip) and hard macrozones (relatively hard for slip), as well as through macrozones favorable for slip.",

keywords = "A- titanium, B- SEM, C- hydrogen embrittlement, C- stress corrosion",

author = "Yali Xu and Xinjie Zhang and Xiaoyang Lu and Shuaifeng Zhang and Zhijie Sun and Fuyang Gao and Jinshan Li and Minjie Lai",

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T1 - Influences of microstructures and macrozones on the stress corrosion cracking sensitivity of a near alpha titanium alloy

AU - Xu, Yali

AU - Zhang, Xinjie

AU - Lu, Xiaoyang

AU - Zhang, Shuaifeng

AU - Sun, Zhijie

AU - Gao, Fuyang

AU - Li, Jinshan

AU - Lai, Minjie

PY - 2024/5/15

Y1 - 2024/5/15

N2 - In this study, we investigated stress corrosion cracking (SCC) behaviors in a near alpha titanium alloy (Ti-6Al-3Nb-2Zr-1Mo) with distinct microstructures and microtextures. By analyzing fracture surfaces, crack growth paths, and grain orientations, we found that the SCC crack growth rate increased with an increase in the volume fraction of the primary αp phase, due to elevated crack initiation density and concentrated grain orientations. Additionally, SCC cracks exhibited a preference for propagating along boundaries between neighboring soft macrozones (easy for slip) and hard macrozones (relatively hard for slip), as well as through macrozones favorable for slip.

AB - In this study, we investigated stress corrosion cracking (SCC) behaviors in a near alpha titanium alloy (Ti-6Al-3Nb-2Zr-1Mo) with distinct microstructures and microtextures. By analyzing fracture surfaces, crack growth paths, and grain orientations, we found that the SCC crack growth rate increased with an increase in the volume fraction of the primary αp phase, due to elevated crack initiation density and concentrated grain orientations. Additionally, SCC cracks exhibited a preference for propagating along boundaries between neighboring soft macrozones (easy for slip) and hard macrozones (relatively hard for slip), as well as through macrozones favorable for slip.

KW - A- titanium

KW - B- SEM

KW - C- hydrogen embrittlement

KW - C- stress corrosion

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U2 - 10.1016/j.corsci.2024.112015

DO - 10.1016/j.corsci.2024.112015

M3 - 文章

AN - SCOPUS:85189023358

SN - 0010-938X

VL - 232

JO - Corrosion Science

JF - Corrosion Science

M1 - 112015

ER -

Influences of microstructures and macrozones on the stress corrosion cracking sensitivity of a near alpha titanium alloy

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