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Interface microstructure and strength properties of Ti–6Al–4V and microduplex stainless steel diffusion bonded joints
Research highlights ► Titanium alloy and micro duplex stainless steel was diffusion bonded. ► Variation of temperature was done to achieve maximum strength. ► Interface microstructure with mechanical properties was co-related.
Abstract 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 45min 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 ∼520.1MPa and shear strength of ∼405.5MPa 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.
Interface microstructure and strength properties of Ti–6Al–4V and microduplex stainless steel diffusion bonded joints
Research highlights ► Titanium alloy and micro duplex stainless steel was diffusion bonded. ► Variation of temperature was done to achieve maximum strength. ► Interface microstructure with mechanical properties was co-related.
Abstract 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 45min 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 ∼520.1MPa and shear strength of ∼405.5MPa 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.
Interface microstructure and strength properties of Ti–6Al–4V and microduplex stainless steel diffusion bonded joints
Kundu, S. (author) / Sam, S. (author) / Chatterjee, S. (author)
2010-12-23
7 pages
Article (Journal)
Electronic Resource
English
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