Welding metallurgy of nickel alloys in gas turbine components

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Description

Materials for gas turbine engines are required to meet a wide range of temperature and stress application requirements. These alloys exhibit a combination of creep resistance, creep rupture strength, yield and tensile strength over a wide temperature range, resistance to environmental attack (including oxidation, nitridation, sulphidation and carburization), fatigue and thermal fatigue resistance, metallurgical stability and useful thermal expansion characteristics. These properties are exhibited by a series of solid-solution-strengthened and precipitation-hardened nickel, iron and cobalt alloys. The properties needed to meet the turbine engine requirements have been achieved by specific alloy additions, by heat treatment and by thermal mechanical processing. ... continued below

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9 pages; Other: FDE: PDF

Creation Information

Lingenfelter, A. C., LLNL May 21, 1997.

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This article 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 74 times , with 7 in the last month . More information about this article can be viewed below.

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Description

Materials for gas turbine engines are required to meet a wide range of temperature and stress application requirements. These alloys exhibit a combination of creep resistance, creep rupture strength, yield and tensile strength over a wide temperature range, resistance to environmental attack (including oxidation, nitridation, sulphidation and carburization), fatigue and thermal fatigue resistance, metallurgical stability and useful thermal expansion characteristics. These properties are exhibited by a series of solid-solution-strengthened and precipitation-hardened nickel, iron and cobalt alloys. The properties needed to meet the turbine engine requirements have been achieved by specific alloy additions, by heat treatment and by thermal mechanical processing. A thorough understanding of the metallurgy and metallurgical processing of these materials is imperative in order to successfully fusion weld them. This same basic understanding is required for repair of a component with the added dimension of the potential effects of thermal cycling and environmental exposure the component will have endured in service. This article will explore the potential problems in joining and repair welding these materials.

Physical Description

9 pages; Other: FDE: PDF

Notes

OSTI as DE00016395

Source

  • Proceedings for ASM International, Joining and Repair of Gas Turbine Components Annual Event '97, Indianapolis, IN (US), 09/14/1997--09/18/1997; Other Information: Supercedes report DE98051014; PBD: 21 May 97

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  • Other: DE98051014
  • Report No.: UCRL-JC-127532
  • Report No.: CONF-970929*--
  • Grant Number: W-7405-Eng-48
  • Office of Scientific & Technical Information Report Number: 16395
  • Archival Resource Key: ark:/67531/metadc625341

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

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  • May 21, 1997

Added to The UNT Digital Library

  • June 16, 2015, 7:43 a.m.

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  • Jan. 3, 2017, 5:35 p.m.

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Lingenfelter, A. C., LLNL. Welding metallurgy of nickel alloys in gas turbine components, article, May 21, 1997; (digital.library.unt.edu/ark:/67531/metadc625341/: accessed July 18, 2018), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.