The Applications of SPF/DB Combined with Welding Technologies

2007 ◽  
Vol 551-552 ◽  
pp. 49-54 ◽  
Author(s):  
Zhi Qiang Li ◽  
X.H. Li
Keyword(s):  
Mechanical Properties ◽  
Electron Beam ◽  
Laser Beam ◽  
Diffusion Bonding ◽  
Electron Beam Welding ◽  
Aerospace Industry ◽  
Laser Beam Welding ◽  
Superplastic Forming ◽  
And Diffusion ◽  
Integrated Structures

Superplastic forming and diffusion bonding (SPF/DB) processes have been growing mature and titanium SPF/DB components have found wide application in aerospace industry. With the development of industrial SPF/DB technology, the size of SPF/DB components become bigger and bigger, and the shapes of components become more complex. However, the component sizes are limited by equipments, dies and the size of sheet. SPF/DB combined with welding technologies could be one of the possible solutions to form larger and more integrated structures due to many advantages compared with conventional process. This paper studied the combination processing of SPF and other welding methods besides diffusion bonding, such as electron beam welding and laser beam welding, and explained the experiments performed in different processes, including SPF after welding plate and welding plate after SPF. The results show that the material exhibits both reasonable formability and excellent mechanical properties. Application samples such as covers were manufactured by the combination processing. Furthermore, prospects of the combining technology were discussed at the end of paper.

A Study on Different Welding Processes of IN718 for Elevated Temperature Application

2015 ◽  
Vol 1125 ◽  
pp. 186-189
Author(s):  
Kyung Ju Min ◽  
Jong Hoon Yoon ◽  
Joon Tae Yoo ◽  
Ho Sung Lee
Keyword(s):  
Elevated Temperature ◽  
Laser Beam ◽  
Electron Beam Welding ◽  
Hot Isostatic Pressing ◽  
Laser Beam Welding ◽  
Superplastic Forming ◽  
Internal Cooling ◽  
Cooling Channels ◽  
Solid Solution Strengthening ◽  
Welding Processes

Alloy IN718 is a nickel based precipitation hardened material and it has the necessary strength over a range of temperatures which includes the operating range for many rocket propulsion systems and jet engines. This performance is accomplished by a combination of solid-solution strengthening, precipitation strengthening and grain-boundary strengthening. However, it is common for precipitation hardened nickel based superalloys to have a problem of post-weld cracking. In this study, several welding processes are investigated to obtain the optimum welding method of IN718 for elevated temperature forming. These include LBW(Laser Beam Welding), EBW(Electron Beam Welding), HIP(hot isostatic pressing), and solid state diffusion bonding. The result shows that the LBW specimen performs the highest formability at 980°C so that this process can be applied to superplastic forming of IN718 sheet. It is demonstrated that the elevated temperature superplastic forming of nozzle extension with internal cooling channels was possible with laser beam welded IN718 sheet.

Application of Superplastic Forming and Diffusion Bonding in the Aerospace Industry

2005 ◽  
Vol 475-479 ◽  
pp. 3037-3042 ◽  
Author(s):  
Zhi Qiang Li ◽  
He Ping Guo
Keyword(s):  
Aluminum Alloys ◽  
Diffusion Bonding ◽  
Aerospace Industry ◽  
Superplastic Forming ◽  
Fabrication Process ◽  
Real Potential ◽  
Current Trends ◽  
Component Design ◽  
And Diffusion

As a versatile fabrication process for titanium and aluminum alloys, SPF/DB offers a real potential for revolutionizing aerospace component design. In this paper, the principle, advantages, techno-economics of the process, as well as its application in aerospace industry are introduced. The current trends and the factors relating to the process’s developments are given.

Hot Forming and Superplastic Forming: Presses Evolution and New Applications in the Aerospace Industry

2016 ◽  
Vol 838-839 ◽  
pp. 563-567
Author(s):  
Guillaume Sana ◽  
Alain Petiot ◽  
Arnaud Giraudet
Keyword(s):  
Diffusion Bonding ◽  
Metal Forming ◽  
Aerospace Industry ◽  
Superplastic Forming ◽  
Hot Forming ◽  
Research Programs ◽  
New Applications ◽  
And Diffusion

ACB (France) and its sister company Cyril Bath (USA) have a long experience in the fields of hydraulic presses and metal forming for the aerospace industry. This experience is particularly focused on the manufacturing of structural and engines parts. The purpose of this presentation is to show how the combination of both activities in the fields of Hot Forming/Sizing and Superplastic Forming results in continual progress and how recent evolution open new fields of applications. First, both processes will be shortly introduced. The advantages of Hot Forming, Superplastic forming and Diffusion Bonding technologies will be demonstrated regarding current customer’s requirements. To conclude an overview of on-going research programs will be made to present strong advantages of dual presses combining Hot Forming and Superplastic processes.

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