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Title: Grain growth behavior and high-temperature high-strain-rate tensile ductility of iridium alloy DOP-26

Abstract

This report summarizes results of studies conducted to date under the Iridium Alloy Characterization and Development subtask of the Radioisotope Power System Materials Production and Technology Program to characterize the properties of the new-process iridium-based DOP-26 alloy used for the Cassini space mission. This alloy was developed at Oak Ridge National Laboratory (ORNL) in the early 1980`s and is currently used by NASA for cladding and post-impact containment of the radioactive fuel in radioisotope thermoelectric generator (RTG) heat sources which provide electric power for interplanetary spacecraft. Included within this report are data generated on grain growth in vacuum or low-pressure oxygen environments; a comparison of grain growth in vacuum of the clad vent set cup material with sheet material; effect of grain size, test temperature, and oxygen exposure on high-temperature high-strain-rate tensile ductility; and grain growth in vacuum and high-temperature high-strain-rate tensile ductility of welded DOP-26. The data for the new-process material is compared to available old-process data.

Authors:
; ; ; ; ;
Publication Date:
Research Org.:
Oak Ridge National Lab., TN (United States)
Sponsoring Org.:
USDOE, Washington, DC (United States); USDOE Assistant Secretary for Nuclear Energy, Washington, DC (United States)
OSTI Identifier:
296738
Report Number(s):
ORNL-6935
R&D Project: NEAF614; ON: DE98058101; BR: AF7010200; TRN: 99:002119
DOE Contract Number:  
AC05-96OR22464
Resource Type:
Technical Report
Resource Relation:
Other Information: PBD: Apr 1998
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; 07 ISOTOPE AND RADIATION SOURCE TECHNOLOGY; 30 DIRECT ENERGY CONVERSION; IRIDIUM ALLOYS; SPACECRAFT POWER SUPPLIES; THERMOELECTRIC GENERATORS; RADIOISOTOPE BATTERIES; RADIOISOTOPE HEAT SOURCES; GRAIN GROWTH; DUCTILITY; EXPERIMENTAL DATA; NESDPS Office of Nuclear Energy Space and Defense Power Systems

Citation Formats

McKamey, C G, Gubbi, A N, Lin, Y, Cohron, J W, Lee, E H, and George, E P. Grain growth behavior and high-temperature high-strain-rate tensile ductility of iridium alloy DOP-26. United States: N. p., 1998. Web. doi:10.2172/296738.
McKamey, C G, Gubbi, A N, Lin, Y, Cohron, J W, Lee, E H, & George, E P. Grain growth behavior and high-temperature high-strain-rate tensile ductility of iridium alloy DOP-26. United States. https://doi.org/10.2172/296738
McKamey, C G, Gubbi, A N, Lin, Y, Cohron, J W, Lee, E H, and George, E P. Wed . "Grain growth behavior and high-temperature high-strain-rate tensile ductility of iridium alloy DOP-26". United States. https://doi.org/10.2172/296738. https://www.osti.gov/servlets/purl/296738.
@article{osti_296738,
title = {Grain growth behavior and high-temperature high-strain-rate tensile ductility of iridium alloy DOP-26},
author = {McKamey, C G and Gubbi, A N and Lin, Y and Cohron, J W and Lee, E H and George, E P},
abstractNote = {This report summarizes results of studies conducted to date under the Iridium Alloy Characterization and Development subtask of the Radioisotope Power System Materials Production and Technology Program to characterize the properties of the new-process iridium-based DOP-26 alloy used for the Cassini space mission. This alloy was developed at Oak Ridge National Laboratory (ORNL) in the early 1980`s and is currently used by NASA for cladding and post-impact containment of the radioactive fuel in radioisotope thermoelectric generator (RTG) heat sources which provide electric power for interplanetary spacecraft. Included within this report are data generated on grain growth in vacuum or low-pressure oxygen environments; a comparison of grain growth in vacuum of the clad vent set cup material with sheet material; effect of grain size, test temperature, and oxygen exposure on high-temperature high-strain-rate tensile ductility; and grain growth in vacuum and high-temperature high-strain-rate tensile ductility of welded DOP-26. The data for the new-process material is compared to available old-process data.},
doi = {10.2172/296738},
url = {https://www.osti.gov/biblio/296738}, journal = {},
number = ,
volume = ,
place = {United States},
year = {1998},
month = {4}
}