On ripple-load, stress-corrosion, and sustained-load cracking behavior in a high strength beta titanium alloy

Journal Article · Sun Jun 01 04:00:00 EDT 1997 · Scripta Materialia

DOI:https://doi.org/10.1016/S1359-6462(96)00490-3· OSTI ID:509167

Pao, P S; Meyn, D A; Bayles, R A; Feng, C R ^[1]; Yoder, G R ^[2]

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1. Naval Research Lab., Washington, DC (United States)
2. Office of Naval Research, Arlington, VA (United States)

Both overaged and peakaged TIMETAL 21S beta titanium alloys exhibit significant ripple-load cracking susceptibility in salt water and in ambient air environments. At R = 0.90, the ripple-load cracking thresholds of the overaged alloy are 67% and 72% lower than the stress-corrosion cracking and sustained-load cracking thresholds. For the peakaged alloy, the reductions are 55% and 61%. The stress-corrosion cracking threshold in salt water and the sustained-load cracking threshold in air of peakaged TIMETAL 21S are significantly lower while the ripple-load cracking threshold is slightly lower than those of the overaged alloy. The stress-corrosion cracking, sustained-load cracking, and ripple-load cracking resistance of peakaged TIMETAL 21S are significantly inferior to those of both beta-annealed Ti-6Al-4V and Ti-15V-3Cr-3Al-3Sn. The ripple-load cracking resistance of overaged TIMETAL 21S, though better than Ti-15V-3Cr-3Al-3Sn, is still inferior than that of beta-annealed Ti-6Al-4V.

• Sponsoring Organization: Office of Naval Research, Washington, DC (United States)
• OSTI ID: 509167
• Journal Information: Scripta Materialia, Journal Name: Scripta Materialia Journal Issue: 11 Vol. 36; ISSN 1359-6462; ISSN SCMAF7
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
AEROSPACE INDUSTRY
AGING
AIR
CRACK PROPAGATION
FRACTURE MECHANICS
FRACTURE PROPERTIES
SODIUM CHLORIDES
STRESS CORROSION
STRESS INTENSITY FACTORS
TITANIUM BASE ALLOYS