Dynamic strength and strain rate effects on fracture behavior of tungsten and tungsten alloys

Conference · Tue Jan 01 04:00:00 EST 1991

DOI:https://doi.org/10.1051/jp4:1991388· OSTI ID:5519323

Zurek, A K; Gray, III, G T

An investigation of the stress-strain response as a function of strain rate, spall strength, and dynamic fracture behavior of pure W, W-26Re, W-Ni-Fe and W-Ni-Fe-Co has been performed. Spall strength measurements, obtained in symmetric-impact tests, showed an increase in spall strength from 0.4 GPa for pure tungsten to 3.8 GPa for 90W- 7Ni-3Fe. Concurrent with increase in spall strength was a change in fracture mode from cleavage (for pure W) to a mixture of transgranular and intergranular fracture for the alloyed systems. Compression testing performed at strain rates from 10{sup {minus}3} s{sup {minus}1} to 3000 s{sup {minus}1} showed that pure tungsten exhibits a large strain rate sensitivity and almost no work hardening at tested strain rates. In contrast, W-26Re and W-Ni-Fe-Co displayed significant work hardening at all strain rates. 12 refs., 5 figs. 2 tabs.

• Research Organization: Los Alamos National Lab., NM (United States)
• Sponsoring Organization: DOE; USDOE, Washington, DC (United States)
• DOE Contract Number: W-7405-ENG-36
• OSTI ID: 5519323
• Report Number(s): LA-UR-91-1652; CONF-911069--3; ON: DE91013029
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
COBALT ALLOYS
CRYSTAL DEFECTS
CRYSTAL STRUCTURE
DISLOCATIONS
ELEMENTS
FRACTURE PROPERTIES
HARDENING
IRON ALLOYS
LINE DEFECTS
MECHANICAL PROPERTIES
METALS
NICKEL ALLOYS
RHENIUM ALLOYS
STRAIN RATE
STRESSES
TRANSITION ELEMENTS
TUNGSTEN
TUNGSTEN ALLOYS
TUNGSTEN BASE ALLOYS