MECHANICAL PROPERTIES OF SOME REFRACTORY METALS AND THEIR ALLOYS

Technical Report · Wed Apr 01 04:00:00 EST 1964

DOI:https://doi.org/10.2172/4010364· OSTI ID:4010364

McCoy, Jr., H. E.; Stephenson, R. L.; Weir, Jr., J. R.

A critical evaluation has been made of the available mechanical property data for Nb-, Mo-, Ta-, and W-base alloys. It was fouad that insufficient data are available to allow the design and construction of complex engineering systems involving these materials. A general evaluation of the potential service temperatures for Nb-, Mo-, Ta-, and W-base alloys was made on the basis that conventional a1loys have been used up to two thirds of their absolute melting poirt. Strengthening mechanisms that have been used to achieve high operating temperatures for conventionnl alloys and that could be applied to refractory alloys are discussed. A review of the literature on the effects of irradiation on the mechanical properties of niobium, molybdenum, tantalum, and tungsten has been made. It has been found that the existing data on this topic are rather scant. The data in general show that the ductility of molybdenum, tantalum, and tungsten is reduced after irradiation at ambient temperatures. The yield and ultimate strengths are increased slightiy by irradiation. High-temperature tube- burst tests show that the rupture life of the Nb--1% Zr alloy is not drastically influenced by irradiation. (auth)

• Research Organization: Oak Ridge National Lab., Tenn.
• DOE Contract Number: W-7405-ENG-26
• NSA Number: NSA-18-020456
• OSTI ID: 4010364
• Report Number(s): ORNL-3593
• Country of Publication: United States
• Language: English

Related Subjects

DUCTILITY
FAILURES
HIGH TEMPERATURE
IRRADIATION
MATERIALS TESTING
MECHANICAL PROPERTIES
METALS, CERAMICS, AND OTHER MATERIALS
MOLYBDENUM
MOLYBDENUM ALLOYS
NIOBIUM
NIOBIUM ALLOYS
PLANNING
RADIATION EFFECTS
REFRACTORIES
TANTALUM
TANTALUM ALLOYS
TEMPERATURE
TENSILE PROPERTIES
TUBES
TUNGSTEN
TUNGSTEN ALLOYS
ZIRCONIUM ALLOYS