Diffusion bonding of TC21 titanium alloy was carried out at temperature ranging from 780 ℃ to 980 ℃ for 5-90 *** interfacial bonding ratio,deformation ratio,microstructures and microhardness of the diffusion bonded ...
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Diffusion bonding of TC21 titanium alloy was carried out at temperature ranging from 780 ℃ to 980 ℃ for 5-90 *** interfacial bonding ratio,deformation ratio,microstructures and microhardness of the diffusion bonded joints were *** show that joints with high bonding quality can be obtained when bonded at 880 ℃ for 15？30 *** microhardness increases with increasing the bonding temperature,while it has a peak value（HV367） when bonding time is prolonged up to 90 *** equiaxed microstructures,bi-modal microstructures and fully lamellar microstructures were observed when bonded in temperature range of 780-880 ℃,at 930 ℃ or 980 ℃,*** volume fraction of α phase first increases and achieves the maximum when bonded at 880 ℃ for 60 min,and then descended.
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