• interface microstructure and strength properties of ti–6al–4v and microduplex stainless steel diffusion bonded joints

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    • تاریخ ارائه: 1390/01/01
    • تاریخ انتشار در تی پی بین: 1390/01/01
    • تعداد بازدید: 613
    • تعداد پرسش و پاسخ ها: 0
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     the diffusion bonding of ti–6al–4v alloy and micro-duplex stainless steel was carried out in the temperature range of 850–1000 °c for 45 min in vacuum. the influence of bonding temperature on the microstructural development, micro-hardness and strength properties across the joint region was determined. the layer wise σ phase, λ + feti and λ + feti + β-ti phase mixtures were observed at the bond interface when the joint was processed at 900 °c and above temperature. the maximum tensile strength of ∼520.1 mpa and shear strength of ∼405.5 mpa along with 6.8% elongation were obtained for the diffusion couple processed at 900 °c. fracture surface observation in scanning electron microscopy (sem) using energy dispersive x-ray spectroscope (eds) demonstrates that, failure takes place through λ + feti phase when bonding was processed at 900 °c, however, failure takes place through σ phase for the diffusion joints processed at and above 950 °c.

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