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Title: MECHANICAL BEHAVIOR OF MOLYBDENUM DISILICIDE-BASED ALLOYS

Abstract

We have investigated the mechanical behavior of the following single-phase polycrystalline alloys with the MoSi{sub 2} body-center tetragonal structure: MoSi{sub 2} alloyed with {approximately}2.5 at.% Re, MoSi{sub 2} alloyed with 2 at.% Al, MoSi{sub 2} alloyed with 1 at.% Nb, and MoSi{sub 2} alloyed with 1 at.% Re and 2 at.% Al. Several anomalies in the mechanical behavior of alloyed materials were observed. For example, (1) addition of only {approximately}2.5 at. % Re results in an order of magnitude increase in compressive strength at 1600 C, (2) additions of Nb and Al cause solution softening at near-ambient temperatures, and (3) quaternary MoSi{sub 2}-Re-Al alloys show strengthening at elevated temperatures and reduction in flow stress with enhanced plasticity at near-ambient temperatures in compression. The mechanisms of anomalous solution hardening and softening are discussed.

Authors:
; ;
Publication Date:
Research Org.:
Los Alamos National Lab., NM (US)
Sponsoring Org.:
US Department of Energy (US)
OSTI Identifier:
772831
Report Number(s):
LA-UR-00-6114
TRN: AH200121%%68
DOE Contract Number:
W-7405-ENG-36
Resource Type:
Conference
Resource Relation:
Conference: Conference title not supplied, Conference location not supplied, Conference dates not supplied; Other Information: PBD: 1 Dec 2000
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; ALLOYS; COMPRESSION; FLOW STRESS; HARDENING; MOLYBDENUM; PLASTICITY

Citation Formats

A. MISRA, A. SHARIF, and ET AL. MECHANICAL BEHAVIOR OF MOLYBDENUM DISILICIDE-BASED ALLOYS. United States: N. p., 2000. Web.
A. MISRA, A. SHARIF, & ET AL. MECHANICAL BEHAVIOR OF MOLYBDENUM DISILICIDE-BASED ALLOYS. United States.
A. MISRA, A. SHARIF, and ET AL. Fri . "MECHANICAL BEHAVIOR OF MOLYBDENUM DISILICIDE-BASED ALLOYS". United States. doi:. https://www.osti.gov/servlets/purl/772831.
@article{osti_772831,
title = {MECHANICAL BEHAVIOR OF MOLYBDENUM DISILICIDE-BASED ALLOYS},
author = {A. MISRA and A. SHARIF and ET AL},
abstractNote = {We have investigated the mechanical behavior of the following single-phase polycrystalline alloys with the MoSi{sub 2} body-center tetragonal structure: MoSi{sub 2} alloyed with {approximately}2.5 at.% Re, MoSi{sub 2} alloyed with 2 at.% Al, MoSi{sub 2} alloyed with 1 at.% Nb, and MoSi{sub 2} alloyed with 1 at.% Re and 2 at.% Al. Several anomalies in the mechanical behavior of alloyed materials were observed. For example, (1) addition of only {approximately}2.5 at. % Re results in an order of magnitude increase in compressive strength at 1600 C, (2) additions of Nb and Al cause solution softening at near-ambient temperatures, and (3) quaternary MoSi{sub 2}-Re-Al alloys show strengthening at elevated temperatures and reduction in flow stress with enhanced plasticity at near-ambient temperatures in compression. The mechanisms of anomalous solution hardening and softening are discussed.},
doi = {},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Fri Dec 01 00:00:00 EST 2000},
month = {Fri Dec 01 00:00:00 EST 2000}
}

Conference:
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