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Elevated temperature tribology of Ni alloys under helium environment for nuclear reactor applications

Journal Article · · Tribology International
 [1];  [2];  [3];  [2];  [4]
  1. Texas A & M Univ., College Station, TX (United States); Texas A&M University
  2. Purdue Univ., West Lafayette, IN (United States)
  3. George Mason Univ., Fairfax, VA (United States)
  4. Texas A & M Univ., College Station, TX (United States)

The current study investigates the friction and wear behavior of two primary candidate materials, Inconel 617 and alloy 800HT for high-temperature gas cooled nuclear reactors/very-high-temperature reactors. Using a custom-built high temperature tribometer, helium cooled reactor environment was simulated at room and 800 °C temperatures. Microscopy and chemical analyses were carried out to explain the tribological performance of the alloys. At elevated temperatures, both alloys show higher friction in helium, compared to air environment. Both alloys exhibit high wear resistance in all experimental conditions, except at high temperature helium environment. In conclusion, the formation of glazed and mechanically mixed layers of oxides were found to be important causes for the lower friction and wear in high temperature air atmosphere.

Research Organization:
Texas A & M Univ., College Station, TX (United States)
Sponsoring Organization:
USDOE Office of Nuclear Energy (NE)
Grant/Contract Number:
NE0008549
OSTI ID:
1580558
Journal Information:
Tribology International, Journal Name: Tribology International Journal Issue: C Vol. 123; ISSN 0301-679X
Publisher:
ElsevierCopyright Statement
Country of Publication:
United States
Language:
English

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Cited By (2)

Nanomechanical Characterization of Laser Peened Additively Manufactured Inconel 718 Superalloy journal July 2019
Helium Tribology of Inconel 617 at Elevated Temperatures up to 950°C: Parametric Study journal April 2019