Designation:F945−12StandardTestMethodforStress-CorrosionofTitaniumAlloysbyAircraftEngineCleaningMaterials1ThisstandardisissuedunderthefixeddesignationF945;thenumberimmediatelyfollowingthedesignationindicatestheyearoforiginaladoptionor,inthecaseofrevision,theyearoflastrevision.Anumberinparenthesesindicatestheyearoflastreapproval.Asuperscriptepsilon(´)indicatesaneditorialchangesincethelastrevisionorreapproval.ThisstandardhasbeenapprovedforusebyagenciesoftheU.S.DepartmentofDefense.INTRODUCTIONChemicalsolutionsandcompoundsusedforpreinspectioncleaningorforpreservationoftitaniumalloyaircraftturbineenginepartsshallbesubjecttoqualificationrequirementsofthistestmethod.1.Scope1.1Thistestmethodestablishesatestprocedurefordeter-miningthepropensityofaircraftturbineenginecleaningandmaintenancematerialsforcausingstresscorrosioncrackingoftitaniumalloyparts.1.2Theevaluationisconductedonrepresentativetitaniumalloysbydeterminingtheeffectofcontactwithcleaningandmaintenancematerialsontendencyofprestressedtitaniumalloystocrackwhensubsequentlyheatedtoelevatedtempera-tures.1.3Testconditionsarebaseduponmanufacturer’smaxi-mumrecommendedoperatingsolutionconcentration.1.4Thevaluesstatedininch-poundunitsaretoberegardedasstandard.ThevaluesgiveninparenthesesaremathematicalconversionstoSIunitsthatareprovidedforinformationonlyandarenotconsideredstandard.1.5Thisstandarddoesnotpurporttoaddressallofthesafetyconcerns,ifany,associatedwithitsuse.Itistheresponsibilityoftheuserofthisstandardtoestablishappro-priatesafetyandhealthpracticesanddeterminetheapplica-bilityofregulatorylimitationspriortouse.Forspecificprecautionarystatements,see5.3and5.6.2.ReferencedDocuments2.1ASTMStandards:2D740SpecificationforMethylEthylKetoneD841SpecificationforNitrationGradeTolueneD1193SpecificationforReagentWater2.2SAEAerospaceMaterialSpecifications:AMS4911Sheet,StripandPlate-6AL-4VAnnealed3AMS4916Sheet,Strip,andPlate-8AL1MO1V,DuplexAnnealed33.SignificanceandUse3.1Becauseofthetendencyofprestressedtitaniumalloypartstocra...
