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Fatigue properties of temperature gradient transient liquid phase diffusion bonded Al7075-T6 alloy
, Article Transactions of Nonferrous Metals Society of China (English Edition) ; Volume 25, Issue 4 , April , 2015 , Pages 1073-1079 ; 10036326 (ISSN) ; Ekrami, A ; Farahany, S ; Jahangiri, A ; Sharif University of Technology
Nonferrous Metals Society of China
2015
Abstract
Abstract Fatigue properties of Al7075-T6 alloy joined by temperature gradient transient liquid phase (TGTLP) diffusion bonding using liquid gallium interlayer was investigated. The fatigue specimen was jointed at 460 °C under 10 MPa pressure for 10 min. The TLP bonded samples were homogenized at 465 °C for 2 h and then T6-heat treated. The fatigue life of Al7075-T6 alloy was determined as 107 cycles under 90 MPa while the fatigue life of TLP bonded sample under this stress amplitude was 1.2×106 cycles, which is about 10% of the total Al7075 alloy fatigue life. The fatigue fracture surfaces of Al7075 sample and TGTLP bonded sample were studied using scanning electron microscope to...