Low-pressure diffusion bonding of SAE 316 stainless steel by inserting a superplastic interlayer
- National Taiwan Univ., Taipei (Taiwan, Province of China)
Diffusion bonding is a solid-state joining technique in which two similar or dissimilar materials are brought together under pressure at a temperature below the melting point of the materials. For a material with lower flow stress, the applied pressure needed to provide a intimate contact surface will also be low. Another advantage in this case is that even if the workpieces possess a rougher surface it can be effectively bonded. A superplastic alloy is a typical example of such a material with lower flow stress. Furthermore, a superplastic alloy possesses very fine grains and thus more grain boundary diffusion paths will be present, which provides another beneficial effect for diffusion bonding. However, most commercial technical alloys do not have superplastic characteristics. In order to use the above advantages of lower flow stress and more diffusion paths only existing for superplastic materials, an innovative process has been proposed. By inserting a superplastic interlayer with diffusion bonding compatibility in between the workpieces to be bonded, a better bond may be obtained. In the present study, a SAE 316 stainless steel was diffusion bonded by this method. A SuperDux 65 stainless steel plate was employed as its superplastic interlayer.
- OSTI ID:
- 237807
- Journal Information:
- Scripta Metallurgica et Materialia, Vol. 33, Issue 8; Other Information: PBD: 15 Oct 1995
- Country of Publication:
- United States
- Language:
- English
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