DEVELOPMENT OF ENGINEERING DATA ON TITANIUM EXTRUSION FOR USE IN AEROSPACE DESIGN

Mechanical property data for Ti6Al-4V, Ti8Al-1Mo-1V and Ti6Al-6V-2Sn extruded shapes in annealed tempers were obtained at test temperatures from -110 F to 800 F to provide a base for development of design information for these materials. Data obtained included ultimate tensile strength, tensile yield strength, compressive yield strength, shear bearing, impact properties, creep, stress-rupture, fatigue and fracture toughness characteristics. Separate heats of material in each of the three alloys were obtained from separate suppliers. Two section sizes were obtained from one of the suppliers to provide information on size effects. Tests conducted to provide data insofar as practicable within the scope of this program on property variations and on scatter. Results of testing indicate that with consideration of effect of temperatures used in extrusion processing, extrusions may be utilized in the same manner as titanium materials produced by other methods such as rolling or forging. Data obtained generally indicates that extruded material may be expected to have not only the cost advantages which result from economy of the shape design, but will possess advantages in developed fracture characteristics and creep characteristics when compared with conventional alpha-beta processing of rolled or forged materials.