Showing papers by "Gürel Çam published in 1996"
TL;DR: In this article, solid-state diffusion bonding of gamma-based titanium aluminides for aerospace applications was carried out with different bonding parameters within the superplastic temperature and pressure range.
Abstract: Solid-state diffusion bonding in conjunction with superplastic forming is a potential candidate for producing complex structural components from gamma-based titanium aluminides for aerospace applications. Solidstate diffusion bonding of TiAl was carried out with different bonding parameters within the superplastic temperature range. Defect-free sound bonds were achieved within the temperature range of 925–1,100 °C and the pressure range of 20–40 MPa. Microtensile tests were carried out to evaluate room-temperature tensile properties of the bonds for comparison of the bonding parameters.
37 citations
31 Dec 1996
TL;DR: In this article, the microstructural characteristics of the intermetallic phases formed at the interface during the bonding process and determine the mechanical properties of Ti-Al dissimilar diffusion bonded joints, namely strength and fracture toughness were also determined.
Abstract: This study was undertaken to identify the microstructural characteristics of the intermetallic phases formed at the interface during the bonding process and determine the mechanical properties of Ti-Al dissimilar diffusion bonded joints, namely strength and fracture toughness. Furthermore, the effect of the intermetallic phases on the strength and fracture toughness of the joint was also determined. The effect of strength mis-match between Ti and Al on the fracture process will also be discussed. This investigation is the first phase of a larger project on the characterization of the intermetallics formed and their influence on strength and fracture toughness of the joints between TiAl-TiAl. A series of diffusion bonds of 25mm {times} 25 mm thick Ti bars were produced using aluminum foils of different thicknesses as interlayer. The bonded joints were tested to determine the fracture toughness properties of the interface formed and the effect of intermetallic phase formation on the fracture toughness was evaluated. Four-point bend specimens containing a crack introduced into the interface during the bonding process were tested to determine the diffusion-bonded interface fracture toughness. Tensile tests of the joints were also conducted to determine their strengths. The bonding conditions required to obtain a sound joint between Timore » and Al were also evaluated.« less
1 citations