Effects of Notches on the Intermediate Creep-Rupture Life of Alloy 617 Weldment

McMurtrey, Michael D; Rupp, Ryann E

Title: Effects of Notches on the Intermediate Creep-Rupture Life of Alloy 617 Weldment

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Abstract

A Code Case has recently been completed that adds Alloy 617 to Section III, Division 5 of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, which covers high temperature nuclear components. However, additional information is needed to address concerns raised by the Nuclear Regulatory Commission that are not covered by the Code Case. The effects of notches (geometric discontinuities) and multiaxial stress on the expected creep life of a component are among these concerns. This report covers the current state of testing of Alloy 617 notched specimens at Idaho National Laboratory, with particular focus on intermediate length (8,000 – 20,000 hours) creep tests of Alloy 617 weld metal. While most of this testing is ongoing, the current state of the tests indicate that the multi-axial stress state imposed by the notch geometry does not negatively impact the creep rupture life of the Alloy 617 weld metal. While the weld metal is notch strengthening in short-term (1,000 – 2,000 hours) testing, it is not clear if this characteristic will continue to hold for intermediate and long-term testing. Ongoing tests will provide additional information to address this concern of a crossover from notch strengthening to notch weakening for intermediatemore » and long-term creep lives.« less

Authors:

^[1];

^[1]

Idaho National Laboratory

Publication Date:: Wed Sep 16 00:00:00 EDT 2020

Research Org.:: Idaho National Lab. (INL), Idaho Falls, ID (United States)

Sponsoring Org.:: USDOE Office of Nuclear Energy (NE)

OSTI Identifier:: 1690254

Report Number(s):: INL/EXT-20-59726-Rev000

DOE Contract Number:: DE-AC07-05ID14517

Resource Type:: Program Document

Country of Publication:: United States

Language:: English

Subject:: 11 - NUCLEAR FUEL CYCLE AND FUEL MATERIALS; Alloy 617; Creep rupture life

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                    McMurtrey, Michael D, and Rupp, Ryann E. Effects of Notches on the Intermediate Creep-Rupture Life of Alloy 617 Weldment.  United States: N. p., 2020. 
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                    McMurtrey, Michael D, & Rupp, Ryann E. Effects of Notches on the Intermediate Creep-Rupture Life of Alloy 617 Weldment.  United States.

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                    McMurtrey, Michael D, and Rupp, Ryann E. 2020.  
        "Effects of Notches on the Intermediate Creep-Rupture Life of Alloy 617 Weldment".  United States.  https://www.osti.gov/servlets/purl/1690254.

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@article{osti_1690254,

  title        = {Effects of Notches on the Intermediate Creep-Rupture Life of Alloy 617 Weldment},

  author       = {McMurtrey, Michael D and Rupp, Ryann E},

  abstractNote = {A Code Case has recently been completed that adds Alloy 617 to Section III, Division 5 of the American Society of Mechanical Engineers Boiler and Pressure Vessel Code, which covers high temperature nuclear components. However, additional information is needed to address concerns raised by the Nuclear Regulatory Commission that are not covered by the Code Case. The effects of notches (geometric discontinuities) and multiaxial stress on the expected creep life of a component are among these concerns. This report covers the current state of testing of Alloy 617 notched specimens at Idaho National Laboratory, with particular focus on intermediate length (8,000 – 20,000 hours) creep tests of Alloy 617 weld metal. While most of this testing is ongoing, the current state of the tests indicate that the multi-axial stress state imposed by the notch geometry does not negatively impact the creep rupture life of the Alloy 617 weld metal. While the weld metal is notch strengthening in short-term (1,000 – 2,000 hours) testing, it is not clear if this characteristic will continue to hold for intermediate and long-term testing. Ongoing tests will provide additional information to address this concern of a crossover from notch strengthening to notch weakening for intermediate and long-term creep lives.},

  doi          = {},

  url          = {https://www.osti.gov/biblio/1690254},
  journal      = {},
number       = ,

  volume       = ,

  place        = {United States},

  year         = {Wed Sep 16 00:00:00 EDT 2020},

  month        = {Wed Sep 16 00:00:00 EDT 2020}

}

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