Investigation of Subcritical Fatigue Crack Growth in Gamma Titanium Aluminides

The public reporting burden for this collection of inform.tion is estim.ted to .ver.ge 1 hour per response. including the time for reviewing instructions, se.rching existing d.t. sources, g.therin~ .nd m.int.ining the d.t. needed, .nd completing .nd reviewing the collection of inform.tion. Send comments reg.rding this burden estim.te or .ny other .spect of this collection of information, including suggestions for reducing the burden, to Dep.rtment of Defense, W.shington He.dqu.rters Services, Director.te for Inform.tion Oper.tions .nd Reports (0704-0188), 1215 Jefferson D.vls Highw.~, Suite 1204, Arlington, VA 22202-4302. Respondents should be .w.re th.t notwithst.nding .ny other provision of I.w, no person sh.1I be subject to .ny penalty for f.iling to comply with. collection of inform.tion if it does not displ.y • currently v.lid OMS control number. PLEASE DO NOT RETURN YOUR FORM TO THE ABOVE ADDRESS. 1. REPORT DATE (DD-MM-YYYY) 3. DATES COVERED (From To) /12. REPORT TYPE 05-26-2004 Final Technical Report 06-01-1998 to 05-26-2004 4. TITLE AND SUBTITLE Sa. CONTRACT NUMBER Investigation of Subcritical Fatigue Crack Growth in Gamma Titanium NOO014-98-1-0390 ADMIN. MOD. # POOO07 Aluminides 5b. GRANT NUMBER