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Title: Development of high-creep-strength molybdenum and tungsten alloys by the internal nitriding process

Abstract

Substantial increases in the high-temperature creep strength of Mo-Hf alloys can be obtained by internal nitriding. The creep resistance of internally nitrided Mo-1.86 wt % Hf is more than 100 times greater than that of other commercially available molybdenum-base alloys. The HfN precipitates appear to be stable over long times at temperatures near 1600 K. Internally nitrided Mo-Hf alloys appear to be good candidates for fabrication of components of space power systems where the ratio of high-temperature strength to weight is important. They are particularly good candidates for components that can be fabricated from the lower-strength unnitrided alloy and subsequently nitrided to provide high-temperature strength.

Authors:
Publication Date:
Research Org.:
Lawrence Livermore National Lab., CA (USA)
OSTI Identifier:
7195470
Report Number(s):
UCRL-95474; CONF-870102-4
ON: DE87001361
DOE Contract Number:  
W-7405-ENG-48
Resource Type:
Conference
Resource Relation:
Conference: 4. symposium on space nuclear power systems, Albuquerque, NM, USA, 12 Jan 1987; Other Information: Portions of this document are illegible in microfiche products
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; HAFNIUM ALLOYS; DISPERSION HARDENING; NITRIDATION; MOLYBDENUM BASE ALLOYS; CREEP; MECHANICAL PROPERTIES; ALLOYS; CHEMICAL REACTIONS; HARDENING; MOLYBDENUM ALLOYS; NESDPS Office of Nuclear Energy Space and Defense Power Systems; 360103* - Metals & Alloys- Mechanical Properties

Citation Formats

Mitchell, J B. Development of high-creep-strength molybdenum and tungsten alloys by the internal nitriding process. United States: N. p., 1986. Web.
Mitchell, J B. Development of high-creep-strength molybdenum and tungsten alloys by the internal nitriding process. United States.
Mitchell, J B. Thu . "Development of high-creep-strength molybdenum and tungsten alloys by the internal nitriding process". United States. https://www.osti.gov/servlets/purl/7195470.
@article{osti_7195470,
title = {Development of high-creep-strength molybdenum and tungsten alloys by the internal nitriding process},
author = {Mitchell, J B},
abstractNote = {Substantial increases in the high-temperature creep strength of Mo-Hf alloys can be obtained by internal nitriding. The creep resistance of internally nitrided Mo-1.86 wt % Hf is more than 100 times greater than that of other commercially available molybdenum-base alloys. The HfN precipitates appear to be stable over long times at temperatures near 1600 K. Internally nitrided Mo-Hf alloys appear to be good candidates for fabrication of components of space power systems where the ratio of high-temperature strength to weight is important. They are particularly good candidates for components that can be fabricated from the lower-strength unnitrided alloy and subsequently nitrided to provide high-temperature strength.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {1986},
month = {10}
}

Conference:
Other availability
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