Influence of shock loading on the structure/property response of Ti-48Al-2Cr-2Nb and Ti-24Al-11Nb
نویسنده
چکیده
Intermetallics are receiving increasing attention for applications requiring high-leverage materials possessing potentially high pay-offs such as in gas-turbine engines. While the quasistatic deformation response of a broad range of intermetallics is receiving intense scientific and engineering study increased utilization of intermetallics under dynamic loading requires an understanding of their high-rate / shock-wave behavior. In this paper the influence of shock loading on the structure / property behavior of Ti-48A1-2Cr-2Nb and Ti-24A1-llNb is presented. The reload constitutive response of both shock-loaded intermetallics supports the dynamic deformation of both intermetallics being controlled by a Peierls mechanism. Defect generation and storage in intermetallics is compared and contrasted to that typical to conventional disordered metals and alloys.
منابع مشابه
Thermal Shock and Oxidation Behavior of HiPIMS TiAlN Coatings Grown on Ti-48Al-2Cr-2Nb Intermetallic Alloy
A High Power Impulse Magnetron Sputtering (HiPIMS) method for depositing TiAlN environmental barrier coatings on the surface of Ti-48Al-2Cr-2Nb alloy was developed in view of their exploitation in turbine engines. Three differently engineered TiAlN films were processed and their performance compared. Bare intermetallic alloy coupons and coated specimens were submitted to thermal cycling under o...
متن کاملGasper, A.N.D. and Catchpole-Smith, S. and Clare, Adam T. (2017) In-situ synthesis of titanium aluminides
This study explores the capabilities of methods for in-situ synthesis of titanium aluminides using the Direct Metal Deposition process. This allows for the functional grading of components which will be required for next generation aerospace components. The feasibility of three techniques are explored here; firstly, a new process of powder preparation for Additive Manufacturing, satelliting, in...
متن کاملTime-temperature transformation behavior of Ti-24Al- 11Nb
The time-temperature transformation behavior of a rapidly solidified (RS) Ti-24Al-11Nb alloy has been studied between 450 and 850 “C using X-ray diffraction, electron diffraction, transmission electron microscopy and microindentation methods. A revised isothermal transformation path from the initial B2 to the final cz? structure has been proposed: B2 (Pmjm)B19 (Pmma)-0’ (Cmcm) 0’ (Cmcm) a2 (P6,...
متن کاملحذف آخال های غنی از نایوبیم در آلیاژی جدید بر پایه ترکیب بین‌فلزی آلومیناید تیتانیم
ترکیبات بین?فلزی آلومیناید تیتانیم قابلیت کم?نظیری برای استفاده در سازه?های مهندسی در دمای بالا دارد. در این مقاله، ایجاد آخال های غنی از نایوبیم در ریزساختار یک آلیاژ برپایة (Ti-48Al-2Cr-2Nb-1B(%at)) بررسی شده است. نتایج آزمایش ها نشان می?دهد، که اگر از نایوبیم عنصری به منزلة ماده اولیه استفاده شود، آخال های مزبور حتی با چهار مرحله ذوب نیز به طور کامل حذف نمی?شوند. این درحالی است که با ج...
متن کاملEFFECT OF FOREIGN OBJECT DAMAGE ON THE FATIGUE STRENGTH OF AN XDTM �-TiAl ALLOY
High cycle fatigue has become the leading cause of failure in gas turbine engine blades in recent years [1]. The majority of these failures were associated with surface damage such as foreign object damage (FOD). Therefore, the ability of a material to resist impact damage and the subsequent fatigue propagation of any cracks that may result has become a crucial design consideration. Substantial...
متن کامل