Effects of microtexture and Ti3Al (α2) precipitates on stress-corrosion cracking properties of a Ti-8Al-1Mo-1V alloy

Sheng Cao; Chao Voon Samuel  Lim; Bruce Hinton; Xinhua Wu

doi:10.1016/j.corsci.2016.12.012

Effects of microtexture and Ti₃Al (α₂) precipitates on stress-corrosion cracking properties of a Ti-8Al-1Mo-1V alloy

Sheng Cao
, Chao Voon Samuel Lim
, Bruce Hinton
, Xinhua Wu

Materials Science & Engineering

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

47 Citations (Scopus)

Abstract

Effects of microtexture and Ti₃Al (α₂) precipitates on the Stress-Corrosion Cracking (SCC) properties of Ti-8Al-1Mo-1V (Ti-811) have been investigated using a constant displacement SCC test in 0.1 M aqueous sodium chloride (NaCl) solution. SEM, TEM, and EBSD were employed to characterize microstructure and microtexture. Results reveal that both microtexture and α₂ precipitates increase the SCC susceptibility of Ti-811. The SCC propagation direction aligns with microtextured regions, and most α grains were preferentially orientated for basal <a> slip along the SCC crack. SCC susceptibility was eliminated by implementing hot isostatic pressing (HIPping) and post heat-treatment processes through eliminating both crystallographic microtexture and α₂ precipitates. Fractography showed that the formation mechanism of the propagation facets could be attributed to Hydrogen Enhanced Localized Plasticity (HELP).

Original language	English
Pages (from-to)	22-33
Number of pages	12
Journal	Corrosion Science
Volume	116
DOIs	https://doi.org/10.1016/j.corsci.2016.12.012
Publication status	Published - 15 Feb 2017

Keywords

A. Titanium
B. SEM
B. TEM
C. Hydrogen embrittlement
C. Stress corrosion

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10.1016/j.corsci.2016.12.012

Cite this

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title = "Effects of microtexture and Ti3Al (α2) precipitates on stress-corrosion cracking properties of a Ti-8Al-1Mo-1V alloy",

abstract = "Effects of microtexture and Ti3Al (α2) precipitates on the Stress-Corrosion Cracking (SCC) properties of Ti-8Al-1Mo-1V (Ti-811) have been investigated using a constant displacement SCC test in 0.1 M aqueous sodium chloride (NaCl) solution. SEM, TEM, and EBSD were employed to characterize microstructure and microtexture. Results reveal that both microtexture and α2 precipitates increase the SCC susceptibility of Ti-811. The SCC propagation direction aligns with microtextured regions, and most α grains were preferentially orientated for basal slip along the SCC crack. SCC susceptibility was eliminated by implementing hot isostatic pressing (HIPping) and post heat-treatment processes through eliminating both crystallographic microtexture and α2 precipitates. Fractography showed that the formation mechanism of the propagation facets could be attributed to Hydrogen Enhanced Localized Plasticity (HELP).",

keywords = "A. Titanium, B. SEM, B. TEM, C. Hydrogen embrittlement, C. Stress corrosion",

author = "Sheng Cao and Lim, \{Chao Voon Samuel\} and Bruce Hinton and Xinhua Wu",

year = "2017",

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doi = "10.1016/j.corsci.2016.12.012",

language = "English",

volume = "116",

pages = "22--33",

journal = "Corrosion Science",

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TY - JOUR

T1 - Effects of microtexture and Ti3Al (α2) precipitates on stress-corrosion cracking properties of a Ti-8Al-1Mo-1V alloy

AU - Cao, Sheng

AU - Lim, Chao Voon Samuel

AU - Hinton, Bruce

AU - Wu, Xinhua

PY - 2017/2/15

Y1 - 2017/2/15

N2 - Effects of microtexture and Ti3Al (α2) precipitates on the Stress-Corrosion Cracking (SCC) properties of Ti-8Al-1Mo-1V (Ti-811) have been investigated using a constant displacement SCC test in 0.1 M aqueous sodium chloride (NaCl) solution. SEM, TEM, and EBSD were employed to characterize microstructure and microtexture. Results reveal that both microtexture and α2 precipitates increase the SCC susceptibility of Ti-811. The SCC propagation direction aligns with microtextured regions, and most α grains were preferentially orientated for basal slip along the SCC crack. SCC susceptibility was eliminated by implementing hot isostatic pressing (HIPping) and post heat-treatment processes through eliminating both crystallographic microtexture and α2 precipitates. Fractography showed that the formation mechanism of the propagation facets could be attributed to Hydrogen Enhanced Localized Plasticity (HELP).

AB - Effects of microtexture and Ti3Al (α2) precipitates on the Stress-Corrosion Cracking (SCC) properties of Ti-8Al-1Mo-1V (Ti-811) have been investigated using a constant displacement SCC test in 0.1 M aqueous sodium chloride (NaCl) solution. SEM, TEM, and EBSD were employed to characterize microstructure and microtexture. Results reveal that both microtexture and α2 precipitates increase the SCC susceptibility of Ti-811. The SCC propagation direction aligns with microtextured regions, and most α grains were preferentially orientated for basal slip along the SCC crack. SCC susceptibility was eliminated by implementing hot isostatic pressing (HIPping) and post heat-treatment processes through eliminating both crystallographic microtexture and α2 precipitates. Fractography showed that the formation mechanism of the propagation facets could be attributed to Hydrogen Enhanced Localized Plasticity (HELP).

KW - A. Titanium

KW - B. SEM

KW - B. TEM

KW - C. Hydrogen embrittlement

KW - C. Stress corrosion

UR - https://www.scopus.com/pages/publications/85009435798

U2 - 10.1016/j.corsci.2016.12.012

DO - 10.1016/j.corsci.2016.12.012

M3 - Article

AN - SCOPUS:85009435798

SN - 0010-938X

VL - 116

SP - 22

EP - 33

JO - Corrosion Science

JF - Corrosion Science

ER -

Effects of microtexture and Ti₃Al (α₂) precipitates on stress-corrosion cracking properties of a Ti-8Al-1Mo-1V alloy

Abstract

Keywords

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Centre for Additive Manufacturing (MCAM)

Monash Centre for Electron Microscopy (MCEM)

Cite this

Effects of microtexture and Ti3Al (α2) precipitates on stress-corrosion cracking properties of a Ti-8Al-1Mo-1V alloy

Abstract

Keywords

Access to Document

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Equipment

Centre for Additive Manufacturing (MCAM)

Monash Centre for Electron Microscopy (MCEM)

Cite this

Effects of microtexture and Ti₃Al (α₂) precipitates on stress-corrosion cracking properties of a Ti-8Al-1Mo-1V alloy