Elevated-temperature tensile and creep-rupture behavior of alloy 800H/ERNiCr-3 weld metal/2 1/4 Cr-1 Mo steel dissimilar-metal weldments [electronic resource].

Published:: Washington, D.C. : United States. Dept. of Energy, 1982.
Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Physical Description:: 46 pages : digital, PDF file
Additional Creators:: Oak Ridge National Laboratory, United States. Department of Energy, and United States. Department of Energy. Office of Scientific and Technical Information

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Summary:

Tensile tests at room temperature, 510, and 566°C and creep-rupture tests at 510°C were made on specimens taken from dissimilar-metal welds made on isothermally annealed 2 1/4 Cr-1 Mo steel and mill-annealed alloy 800H plates joined with ERNiCr-3 filler metal. The specimens were machined so that the gage length contained all three alloys; the weld metal was in the center of the gage section. The weldments were tested under several postweld heat treatment (PWHT) and aging conditions. Ductile cup-cone tensile failures occurred in the 2 1/4 Cr-1 Mo steel base metal well removed from the weld fusion line, as expected from the relative base metal properties. For creep at 510°C and rupture lifetimes of up to about 2000 h, failure also occurred in the 2 1/4 Cr-1 Mo steel base metal. Three low-stress tests failed in the 2 1/4 Cr-1 Mo steel with low ductility in over 7500 h within 10 μm of the fusion line. Metallographic studies showed that the interface-type failures resulted by a previously proposed mechanism that involves the formation of a chromium-depleted region parallel to the fusion line.

Report Numbers:

E 1.99:ornl--5899
ornl--5899

Subject(s):

Note:

Published through SciTech Connect.
11/01/1982.
"ornl--5899"
"TI83025508"
Klueh, R L; King, J F.

Funding Information:

W-7405-ENG-26

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