Influence of frequency and microstructure on fatigue crack growth in Ti-6AI-6V-2Sn

N. R. Moody, William W Gerberich

Research output: Contribution to journalArticle

20 Citations (Scopus)

Abstract

Fatigue crack growth behaviour for a mill-annealed Ti-6Al-6V-2Sn alloy tested in air was found to be very sensitive to frequency and microstructure near threshold and again at higher stress intensities. Fracture near threshold was characterized by a combined failure mode involving striation formation, cleavage, and grain boundary separation. A modified Dugdale–Barenblatt model, which quantifies microstructural effects, predicted reasonably good threshold values as a function of grain size. At high stress intensities and a low cyclic frequency, crack growth rates exhibited enhanced values over those observed at a higher frequency. Fracture associated with the enhanced rates was characterized by both cleavage and striation formation. The appearance of the cleaved grains was identical to that observed in sustained load testing and associated with hydrogen embrittlement.

Original languageEnglish (US)
Pages (from-to)95-100
Number of pages6
JournalMetal Science
Volume14
Issue number3
DOIs
StatePublished - Mar 1 1980

Fingerprint

Fatigue crack propagation
striation
cracks
Load testing
microstructure
Microstructure
Hydrogen embrittlement
thresholds
cleavage
Failure modes
hydrogen embrittlement
Crack propagation
Grain boundaries
failure modes
grain boundaries
Air
grain size
air

Cite this

Influence of frequency and microstructure on fatigue crack growth in Ti-6AI-6V-2Sn. / Moody, N. R.; Gerberich, William W.

In: Metal Science, Vol. 14, No. 3, 01.03.1980, p. 95-100.

Research output: Contribution to journalArticle

Moody, N. R. ; Gerberich, William W. / Influence of frequency and microstructure on fatigue crack growth in Ti-6AI-6V-2Sn. In: Metal Science. 1980 ; Vol. 14, No. 3. pp. 95-100.
@article{d0ca731f069d477ea6568f2f3c066fb3,
title = "Influence of frequency and microstructure on fatigue crack growth in Ti-6AI-6V-2Sn",
abstract = "Fatigue crack growth behaviour for a mill-annealed Ti-6Al-6V-2Sn alloy tested in air was found to be very sensitive to frequency and microstructure near threshold and again at higher stress intensities. Fracture near threshold was characterized by a combined failure mode involving striation formation, cleavage, and grain boundary separation. A modified Dugdale–Barenblatt model, which quantifies microstructural effects, predicted reasonably good threshold values as a function of grain size. At high stress intensities and a low cyclic frequency, crack growth rates exhibited enhanced values over those observed at a higher frequency. Fracture associated with the enhanced rates was characterized by both cleavage and striation formation. The appearance of the cleaved grains was identical to that observed in sustained load testing and associated with hydrogen embrittlement.",
author = "Moody, {N. R.} and Gerberich, {William W}",
year = "1980",
month = "3",
day = "1",
doi = "10.1179/msc.1980.14.3.95",
language = "English (US)",
volume = "14",
pages = "95--100",
journal = "Metal Science",
issn = "0306-3453",
publisher = "Metals Society",
number = "3",

}

TY - JOUR

T1 - Influence of frequency and microstructure on fatigue crack growth in Ti-6AI-6V-2Sn

AU - Moody, N. R.

AU - Gerberich, William W

PY - 1980/3/1

Y1 - 1980/3/1

N2 - Fatigue crack growth behaviour for a mill-annealed Ti-6Al-6V-2Sn alloy tested in air was found to be very sensitive to frequency and microstructure near threshold and again at higher stress intensities. Fracture near threshold was characterized by a combined failure mode involving striation formation, cleavage, and grain boundary separation. A modified Dugdale–Barenblatt model, which quantifies microstructural effects, predicted reasonably good threshold values as a function of grain size. At high stress intensities and a low cyclic frequency, crack growth rates exhibited enhanced values over those observed at a higher frequency. Fracture associated with the enhanced rates was characterized by both cleavage and striation formation. The appearance of the cleaved grains was identical to that observed in sustained load testing and associated with hydrogen embrittlement.

AB - Fatigue crack growth behaviour for a mill-annealed Ti-6Al-6V-2Sn alloy tested in air was found to be very sensitive to frequency and microstructure near threshold and again at higher stress intensities. Fracture near threshold was characterized by a combined failure mode involving striation formation, cleavage, and grain boundary separation. A modified Dugdale–Barenblatt model, which quantifies microstructural effects, predicted reasonably good threshold values as a function of grain size. At high stress intensities and a low cyclic frequency, crack growth rates exhibited enhanced values over those observed at a higher frequency. Fracture associated with the enhanced rates was characterized by both cleavage and striation formation. The appearance of the cleaved grains was identical to that observed in sustained load testing and associated with hydrogen embrittlement.

UR - http://www.scopus.com/inward/record.url?scp=0018998568&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0018998568&partnerID=8YFLogxK

U2 - 10.1179/msc.1980.14.3.95

DO - 10.1179/msc.1980.14.3.95

M3 - Article

VL - 14

SP - 95

EP - 100

JO - Metal Science

JF - Metal Science

SN - 0306-3453

IS - 3

ER -