Accession Number:

ADA289156

Title:

Environmentally Assisted Cracking of High Strength Beta Titanium Alloys.

Descriptive Note:

Final rept. 15 Sep 91-15 Sep 94,

Corporate Author:

VIRGINIA UNIV CHARLOTTESVILLE SCHOOL OF ENGINEERING AND APPLIED SCIENCE

Personal Author(s):

• Ganglogg, R. P.
• Scully, J. R.
• Kelly, R. G.

Report Date:

1994-11-01

Pagination or Media Count:

264.0

Abstract:

The objective of this integrated research program is to define the conditions under which high strength Beta-titanium alloys resist environmentally assisted cracking EAC in marine environments. Specific goals are to 1 characterize EAC for metallurgical. chemical and mechanical conditions that could - destabilize crack tip passive films to promote local dissolution and hydrogen uptake, 2 test the hydrogen embrittlement mechanism for EAC, and 3 develop a mechanism-based model of EAC by integrating crack chemistry. surface dissolution and repassivation kinetics. hydrogen uptake to trap sites, and crack tip process zone micromechanics and damage. This final report presents a summary of the results and includes papers published during the period of this grant from September, 1951 to September, 1994.

Descriptors:

• *ENVIRONMENTS
• *CRACKS
• *HIGH STRENGTH ALLOYS
• *TITANIUM ALLOYS
• MECHANICAL PROPERTIES
• INTEGRATED SYSTEMS
• DAMAGE
• CHEMICAL PROPERTIES
• CHEMICALS
• SITES
• FILMS
• PASSIVE SYSTEMS
• HYDROGEN
• KINETICS
• HYDROGEN EMBRITTLEMENT
• RESEARCH MANAGEMENT
• MICROMECHANICS
• OCEAN ENVIRONMENTS
• METALLURGY

Subject Categories:

• Inorganic Chemistry
• Metallurgy and Metallography
• Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE