Simulation of diffusion bonding defects influence on low- cycle fatigue of nonhomogeneous structures

• Autorzy: Temis J.M. , Azmetov H.H. , Timofeev D.S.
• Konferencja: Conference on Fracture Mechanics (XIII ; 5-7.09.2011 ; Opole ; Polska)
• Języki publikacji: EN

Abstrakty

EN

Diffusion bonding (DB) is a technological process providing the bond between different as well as similar materials without melting. The provided bond possesses characteristics up to 95...99% of the respective factors of the parent material. However, even the thoroughly carried out DB contains defects. Because of incorrect choice or coating of the stop-off material and fragile oxide phase unbonded areas, cleavages and microcracks can occur in the bond. Modeling of their formation and influence on DB characteristics meets various difficulties due to the dependence on DB conditions. There- fore the most widespread defect - microvoids, which formation depends on asperities of the bonding surfaces, is considered. Voids are determined as cavities (fig. 1a, b) in the bond plane, which contain neither oxides, nor stop- off. Because of the surface diffusion during DB, microvoids are rounded to nearly spherical form, so they could be approximated as spherical cavities.

Słowa kluczowe

EN

low-cycle fatigue; nonhomogeneous structure; diffusion bonding

• Wydawca: Oficyna Wydawnicza Politechniki Opolskiej
• Czasopismo: Zeszyty Naukowe. Mechanika / Politechnika Opolska
• Rocznik: 2011
• Tom: z. 99
• Strony: 62--64
• Opis fizyczny: Bibliogr. 2 poz., rys.

Twórcy

autor

Temis J.M.

autor

Azmetov H.H.

autor

Timofeev D.S.

• Central Institute of Aviation Motors,

Bibliografia

• [1] GARMONG G., PATON N.E., ARGON A.S.: Attainment of Full Interfacial Contact During Diffusion Bonding. - Metallurgical Transactions, vol.6A, 1975
• [2] TEMIS J.M.: Simulation of processes of nonisothermal elastoplastic deformation in energy-power plant components.- Engineering. Encyclopedia. - Dynamics and strength of machines. Mechanism and Machine Theory. Vol. 1-3 in 2 books. Book 1.-Moscow: Mashinostroyenie, 1994, pp 263-268 (In Russian)