Diffusion bonding/superplastic forming of Ti-6Al-6V-2Sn/SUS 304 stainless steel/Ti-6Al-6V-2Sn |
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| Authors: | JS Shyu TH Chuang |
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| Affiliation: | (1) Institute of Materials Science and Engi- neering, National Taiwan University, Taipei, R.O.C, Taiwan |
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| Abstract: | The superplasticity of the Ti- 6Al- 6V- 2Sn alloy for different temperatures was evaluated by single-sheet free blowing. The
optimal superplastic temperature for the Ti- 6Al- 6V- 2Sn alloy was found to be 850 °C. Diffusion bonding of Ti- 6Al- 6V-
2Sn and 304 stainless steel was carried out in a vacuum. The interface of both bonded alloys was examined by EPMA. The concentration
profile of Ni exhibited a peak at the interlayer and a valley adjacent it, whereas that of Cr exhibited a peak where Ni showed
the valley. X- ray diffraction (XRD) analyses showed that the Fe
2
Ti, NiTi, and CrMn Intermetallic compounds and the Cr element formed at the interface. The thickness profiles of the blown
specimens were measured and compared with theoretical calculations. |
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| Keywords: | diffusion bonding dome height free blowing interface line scan superplastic forming thickness profile Ti-6Al-6V-2Sn |
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