Diffusionsschweissen von ODS-Legierungen mit Hilfe der HIP-Technik
Diffusionsschweissen von ODS-Legierungen mit Hilfe der HIP-Technik
The ODS materials Inconel MA754, Inconel MA6000 and Incoloy MA956 as well as the alloy Incoloy 800H were examined for their diffusion weldability using HIP techniques. Two test specimens $\varnothing$ 8 mm x 35 mm in length of the same materials as well as combinations of an ODS partner material and...
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Personal Name(s): | Hammelmann, K. H. |
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Stöver, Detlev / Buchkremer, Hans Peter / Leyers, H. J. / Serpekian, T. | |
Contributing Institute: |
Publikationen vor 2000; PRE-2000; Retrocat |
Imprint: |
Jülich
Forschungszentrum Jülich GmbH Zentralbibliothek, Verlag
1990
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Physical Description: |
31 p. |
Document Type: |
Report Book |
Research Program: |
ohne Topic |
Series Title: |
Berichte des Forschungszentrums Jülich
2381 |
Link: |
OpenAccess OpenAccess |
Publikationsportal JuSER |
The ODS materials Inconel MA754, Inconel MA6000 and Incoloy MA956 as well as the alloy Incoloy 800H were examined for their diffusion weldability using HIP techniques. Two test specimens $\varnothing$ 8 mm x 35 mm in length of the same materials as well as combinations of an ODS partner material and Incoloy 800H were joined with each other. Optimum adjustment of the HIP parameters - pressure, time and temperature - for the respective material is indispensable for good diffusion welding and was therefore aimed at during the first experimental phase. A good diffusion bond is characterized by the strength of the bonding zone. In order to determine the tensile strength, yield strength and elongation, two identical specimens (same combination under the same HIP conditions) were tested to rupture in a tensile test device at room temperature (RT) and 800°C. It was found that several specimens failed in the region of the joint. This was mainly due to the fact that the HIP pressure adjusted at 40 MPa was too low, but may also be attributed to other causes which still remain to be clarified. For example, the influence of the specimen surface condition was not known. The second experimental phase therefore served to selectively vary the roughness of the bond surface. Gastight encapsulation of the composite material in the joint is required for diffusion bonding by means of HIP. In addition to the conventional method of stainless steel encapsulation, an LPPS (Low Pressure Plasma Spray) encapsulation of the joint was also tested. This type of encapsulation is a simplified and possibly also less costly method, in particular for joining bodies of a complicated shape. |