Superplastic forming


Also found in: Acronyms.

Superplastic forming

A process for shaping super-plastic materials, a unique class of crystalline materials that exhibit exceptionally high tensile ductility. Superplastic materials may be stretched in tension to elongations typically in excess of 200% and more commonly in the range of 400–2000%. There are rare reports of higher tensile elongations reaching as much as 8000%. The high ductility is obtained only for superplastic materials and requires both the temperature and rate of deformation (strain rate) to be within a limited range. The temperature and strain rate required depend on the specific material. A variety of forming processes can be used to shape these materials; most of the processes involve the use of gas pressure to induce the deformation under isothermal conditions at the suitable elevated temperature. The tools and dies used, as well as the superplastic material, are usually heated to the forming temperature. The forming capability and complexity of configurations producible by the processing methods of superplastic forming greatly exceed those possible with conventional sheet forming methods, in which the materials typically exhibit 10–50% tensile elongation. See Superplasticity

There are a number of commercial applications of super-plastic forming and combined superplastic forming and diffusion bonding, including aerospace, architectural, and ground transportation uses. Examples are wing access panels in the Airbus A310 and A320, bathroom sinks in the Boeing 737, turbo-fan-engine cooling-duct components, external window frames in the space shuttle, front covers of slot machines, and architectural siding for buildings. See Metal forming

References in periodicals archive ?
Theoretical prediction and FEM analysis of superplastic forming of AA7475 aluminum alloy in a hemispherical die, Journal of Materials Processing Technology, Vol.
reviews types of superplastic metals and standards for superplastic forming
A June 2006 conference brought together academic researchers and industrial practitioners to share the latest developments and applications in superplasticity and superplastic forming technology.
Superplastic forming of advanced metallic materials; methods and applications.
Volume four includes treatments of advanced melt processing plus casting and joining, spray forming and rapid prototyping, superplasticity and superplastic forming, and modeling and simulation of materials and processes.
The following technical symposia will cover 40 sessions, including how to economically build structures and engines that are safe and reliable, to the latest efforts in microgravity R&D and new materials, as well as the International Symposium on Superplasticity and Superplastic Forming Technology.
This publication addresses the various advances in materials and process technologies required for superplastic forming to enter mass production environments such as the automotive industry, where fast cycle time is a key requirement.
Symposium on Advances in Superplasticity and Superplastic Forming (2004: Charlotte, North America) Ed.
The exterior shape of the car is challenging and the class 'A' aluminum skin panels will utilize superplastic forming techniques in order to realize the unique design that is GT40.
The remarkable technology of superplastic forming was developed and perfected in the former Soviet Union.
All of the components to be supplied are made from sheet titanium alloys, with the majority formed by utilizing Aeromet's superplastic forming skills and chemical milling expertise.