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.

PDF Url : ADA289156

Report Date : NOV 1994

Pagination or Media Count : 264

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