Ultrahigh temperature tensile properties of arc-melted tungsten and tungsten-iridium alloys

Journal Article · Tue Oct 01 00:00:00 EDT 1991 · Scripta Metallurgica; (United States)

DOI:https://doi.org/10.1016/0956-716X(91)90039-4· OSTI ID:5722941

Luo, A; Shin, K S; Jacobson, D L ^[1]

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1. Arizona State Univ., Tempe, AZ (United States). Dept. of Chemical, Bio and Materials Science Engineering

Tungsten is one of the most important metals for high temperature applications. The major deterrents to the use of tungsten are poor fabricability at room temperature and rapid decrease in strength at temperatures above 1600 K. Previous investigations have shown that the addition of rhenium to tungsten improves both room- temperature fabricability and high-temperature strength. Based on its similarity to rhenium's electron structure, iridium as another potential alloying element in tungsten. It was recently confirmed that tungsten-iridium alloys with less than 1.0w/o iridium exhibit better fabricability than tungsten-rhenium alloys at room temperature. The strength properties of tungsten-iridium alloys at ultrahigh temperatures have not yet been researched. The present paper reports the tensile properties of dilute tungsten-iridium alloys in the temperature range 1600 to 2600 K. The focus of the present paper is to examine the effects of iridium concentration and test temperature on the strength and fracture behavior of tungsten-iridium alloys at ultrahigh temperatures.

• OSTI ID: 5722941
• Journal Information: Scripta Metallurgica; (United States), Journal Name: Scripta Metallurgica; (United States) Vol. 25:10; ISSN 0036-9748; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CONCENTRATION RATIO
CURRENTS
DILUTE ALLOYS
ELECTRIC ARCS
ELECTRIC CURRENTS
ELECTRIC DISCHARGES
ELEMENTS
FABRICATION
FAILURES
FRACTURES
IRIDIUM
IRIDIUM ALLOYS
MECHANICAL PROPERTIES
MELTING
METALS
PHASE TRANSFORMATIONS
PLATINUM METAL ALLOYS
PLATINUM METALS
TEMPERATURE RANGE
TEMPERATURE RANGE 0273-0400 K
TEMPERATURE RANGE 1000-4000 K
TENSILE PROPERTIES
TRANSITION ELEMENTS
TUNGSTEN
TUNGSTEN ALLOYS