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

Research output: Contribution to journalArticleResearchpeer-review

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 languageEnglish
Pages (from-to)22-33
Number of pages12
JournalCorrosion Science
Volume116
DOIs
Publication statusPublished - 15 Feb 2017

Keywords

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

Cite this

@article{7d259481d61d48e49faf738fa645383d,
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",
month = "2",
day = "15",
doi = "10.1016/j.corsci.2016.12.012",
language = "English",
volume = "116",
pages = "22--33",
journal = "Corrosion Science",
issn = "0010-938X",
publisher = "Elsevier",

}

Effects of microtexture and Ti3Al (α2) precipitates on stress-corrosion cracking properties of a Ti-8Al-1Mo-1V alloy. / Cao, Sheng; Lim, Chao Voon Samuel ; Hinton, Bruce; Wu, Xinhua.

In: Corrosion Science, Vol. 116, 15.02.2017, p. 22-33.

Research output: Contribution to journalArticleResearchpeer-review

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 - http://www.scopus.com/inward/record.url?scp=85009435798&partnerID=8YFLogxK

U2 - 10.1016/j.corsci.2016.12.012

DO - 10.1016/j.corsci.2016.12.012

M3 - Article

VL - 116

SP - 22

EP - 33

JO - Corrosion Science

JF - Corrosion Science

SN - 0010-938X

ER -