DEVELOPMENT AND EVALUATION OF HIGH-TEMPERATURE TUNGSTEN ALLOYS. Final Report, October 1, 1959-September 30, 1960
Abstract
Ductile high-tungsten alloys, prepared by liquid-phase sintering techniques, were developed for temperatures up to 2000 deg F. Several alloy systems based on W--Ni-Ru with additions of Fe, Mo, or Pt had excellent ductility and useful high-temperature properties; tungsten levels were maintained at 90 wt%, and the ruthenium and platinum additions ranged from 0.5 to 1 wt%. Room- temperature tensile strength values were in the 130,000 to 160,000 psi range with 15 to 25 per cent elongation; ultimate tensile strength values ranged from 34,000 to 41,000 psi at 2000 deg F; and oxidation rates of 0.0015 to 0.034 inch per hour were measured at 2000 deg F. The long-time rupture properties at 2000 deg F were not substantially improved by small alloying additions to the W--Ni--Fe system. Fused coatings of a nickelchromium base alloy, AMS 4775, gave excellent protection to W--Ni-Fe alloys for 500 hours in air at 2000 deg F. Slip casting in plaster molds was used to produce fully dense sintered compacts of 95W--3Ni--2Fe up to 11/4 inches thick. Strong, ductile joints in sintered W--Ni- Fe composites were accomplished using localized induction heating, tungsten-electrode inert-gas welding, and oxyhydrogen torch welding. (auth)
- Authors:
- Publication Date:
- Research Org.:
- Illinois Inst. of Tech., Chicago. Armour Research Foundation
- OSTI Identifier:
- 4756915
- Report Number(s):
- ARF-2158-24; LAR-46
- NSA Number:
- NSA-17-014808
- DOE Contract Number:
- AT(33-3)-4
- Resource Type:
- Technical Report
- Resource Relation:
- Other Information: Orig. Receipt Date: 31-DEC-63
- Country of Publication:
- United States
- Language:
- English
- Subject:
- METALS, CERAMICS, AND OTHER MATERIALS; ALLOYS; CALCIUM SULFATES; CASTING; CHROMIUM ALLOYS; COATING; CORROSION PROTECTION; DEFECTS; DENSITY; DUCTILITY; ELECTRODES; FAILURES; HEAT RESISTING METALS; HEATING; HIGH TEMPERATURE; HYDROGEN; INDUCTION; INERT GASES; IRON ALLOYS; JOINTS; MEASURED VALUES; MOLYBDENUM ALLOYS; NICKEL ALLOYS; OXIDATION; OXYGEN; PLASTER OF PARIS; PLATINUM ALLOYS; PREPARATION; QUANTITY RATIO; RUTHENIUM ALLOYS; SINTERED MATERIALS; SINTERING; SLIP; TEMPERATURE; TENSILE PROPERTIES; THICKNESS; TUNGSTEN ALLOYS; WELDING
Citation Formats
Holtz, F C, and Van Thyne, R J. DEVELOPMENT AND EVALUATION OF HIGH-TEMPERATURE TUNGSTEN ALLOYS. Final Report, October 1, 1959-September 30, 1960. United States: N. p., 1960.
Web.
Holtz, F C, & Van Thyne, R J. DEVELOPMENT AND EVALUATION OF HIGH-TEMPERATURE TUNGSTEN ALLOYS. Final Report, October 1, 1959-September 30, 1960. United States.
Holtz, F C, and Van Thyne, R J. 1960.
"DEVELOPMENT AND EVALUATION OF HIGH-TEMPERATURE TUNGSTEN ALLOYS. Final Report, October 1, 1959-September 30, 1960". United States.
@article{osti_4756915,
title = {DEVELOPMENT AND EVALUATION OF HIGH-TEMPERATURE TUNGSTEN ALLOYS. Final Report, October 1, 1959-September 30, 1960},
author = {Holtz, F C and Van Thyne, R J},
abstractNote = {Ductile high-tungsten alloys, prepared by liquid-phase sintering techniques, were developed for temperatures up to 2000 deg F. Several alloy systems based on W--Ni-Ru with additions of Fe, Mo, or Pt had excellent ductility and useful high-temperature properties; tungsten levels were maintained at 90 wt%, and the ruthenium and platinum additions ranged from 0.5 to 1 wt%. Room- temperature tensile strength values were in the 130,000 to 160,000 psi range with 15 to 25 per cent elongation; ultimate tensile strength values ranged from 34,000 to 41,000 psi at 2000 deg F; and oxidation rates of 0.0015 to 0.034 inch per hour were measured at 2000 deg F. The long-time rupture properties at 2000 deg F were not substantially improved by small alloying additions to the W--Ni--Fe system. Fused coatings of a nickelchromium base alloy, AMS 4775, gave excellent protection to W--Ni-Fe alloys for 500 hours in air at 2000 deg F. Slip casting in plaster molds was used to produce fully dense sintered compacts of 95W--3Ni--2Fe up to 11/4 inches thick. Strong, ductile joints in sintered W--Ni- Fe composites were accomplished using localized induction heating, tungsten-electrode inert-gas welding, and oxyhydrogen torch welding. (auth)},
doi = {},
url = {https://www.osti.gov/biblio/4756915},
journal = {},
number = ,
volume = ,
place = {United States},
year = {Wed Dec 14 00:00:00 EST 1960},
month = {Wed Dec 14 00:00:00 EST 1960}
}