Ductility dip cracking susceptibility of Inconel Filler Metal 52 and Inconel Alloy 690

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Description

Alloy 690 and Filler Metal 52 have become the materials of choice for commercial nuclear steam generator applications in recent years. Filler Metal 52 exhibits improved resistance to weld solidification and weld-metal liquation cracking as compared to other nickel-based filler metals. However, recently published work indicates that Filler Metal 52 is susceptible to ductility dip cracking (DDC) in highly restrained applications. Susceptibility to fusion zone DDC was evaluated using the transverse varestraint test method, while heat affected zone (HAZ) DDC susceptibility was evaluated using a newly developed spot-on-spot varestraint test method. Alloy 690 and Filler Metal 52 cracking susceptibility was ... continued below

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19 p.

Creation Information

Kikel, J.M. & Parker, D.M. June 1, 1998.

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This report is part of the collection entitled: Office of Scientific & Technical Information Technical Reports and was provided by UNT Libraries Government Documents Department to Digital Library, a digital repository hosted by the UNT Libraries. It has been viewed 62 times , with 9 in the last month . More information about this report can be viewed below.

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  • Kikel, J.M. BWX Technologies, Inc. (United States)
  • Parker, D.M. Westinghouse Electric Co., Schenectady, NY (United States)

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Description

Alloy 690 and Filler Metal 52 have become the materials of choice for commercial nuclear steam generator applications in recent years. Filler Metal 52 exhibits improved resistance to weld solidification and weld-metal liquation cracking as compared to other nickel-based filler metals. However, recently published work indicates that Filler Metal 52 is susceptible to ductility dip cracking (DDC) in highly restrained applications. Susceptibility to fusion zone DDC was evaluated using the transverse varestraint test method, while heat affected zone (HAZ) DDC susceptibility was evaluated using a newly developed spot-on-spot varestraint test method. Alloy 690 and Filler Metal 52 cracking susceptibility was compared to the DDC susceptibility of Alloy 600, Filler Metal 52, and Filler Metal 625. In addition, the effect of grain size and orientation on cracking susceptibility was also included in this study. Alloy 690, Filler Metal 82, Filler Metal 52, and Filler Metal 625 were found more susceptible to fusion zone DDC than Alloy 600. Filler Metal 52 and Alloy 690 were found more susceptible to HAZ DDC when compared to wrought Alloy 600, Filler Metal 82 and Filler Metal 625. Filler Metal 52 exhibited the greatest susceptibility to HAZ DDC of all the weld metals evaluated. The base materials were found much more resistant to HAZ DDC in the wrought condition than when autogenously welded. A smaller grain size was found to offer greater resistance to DDC. For weld metal where grain size is difficult to control, a change in grain orientation was found to improve resistance to DDC.

Physical Description

19 p.

Notes

INIS; OSTI as DE98006032

Source

  • 5. international conference on trends in welding research, Pine Mountain, GA (United States), 1-5 Jun 1998

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  • Other: DE98006032
  • Report No.: MAO-T--98-0233
  • Report No.: MER--98-2;CONF-980657--
  • DOI: 10.2172/661678 | External Link
  • Office of Scientific & Technical Information Report Number: 661678
  • Archival Resource Key: ark:/67531/metadc707435

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Creation Date

  • June 1, 1998

Added to The UNT Digital Library

  • Sept. 12, 2015, 6:31 a.m.

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  • Nov. 19, 2015, 9:47 p.m.

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Kikel, J.M. & Parker, D.M. Ductility dip cracking susceptibility of Inconel Filler Metal 52 and Inconel Alloy 690, report, June 1, 1998; United States. (digital.library.unt.edu/ark:/67531/metadc707435/: accessed August 24, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.