Calculation of K /SUB Ic/ using the average increase in crack length

Journal Article · Mon Jul 01 00:00:00 EDT 1985 · Ind. Lab. (Engl. Transl.); (United States)

OSTI ID:6122302

Uskov, E I; Babak, A V

Tungsten shows a tendency to high-temperature embrittlement and is characterized by the stable nature of fracture at temperatures exceeding the maximum temperature of tough-brittle transition. This permits repeated use of specimens in eccentric tensile tests (ETT) in investigating high-temperature crack resistance of commerically pure tungsten obtained by powder metallurgy methods. Testing of specimens for crack resistance was carried out in a vacuum chamber. As the crack resistance parameter the critical stress intensity factor K /SUB Ic/ was selected as determined from the equation of linear-elastic fracture mechanics. Use of the proposed equation for determing K /SUB Ic/ with repeated use of the same specimen without intermediate measurement of the crack length enables a considerable reduction in the duration tests in the evaluation of the hightemperature crack resistance of tungsten.

• Research Organization: Institute of Strength Problems, Academy of Sciences of the Ukranian SSR
• OSTI ID: 6122302
• Journal Information: Ind. Lab. (Engl. Transl.); (United States), Vol. 51:1; Other Information: Translated from Zavodskaya Laboratoriya, Vol. 51, No. 1, pp. 76-78, January 1985
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
TUNGSTEN
CRACK PROPAGATION
FRACTURE PROPERTIES
STRESS ANALYSIS
THERMAL STRESSES
CALCULATION METHODS
DESTRUCTIVE TESTING
HEAT RESISTING ALLOYS
STRESS INTENSITY FACTORS
TEMPERATURE EFFECTS
VACUUM SYSTEMS
ALLOYS
ELEMENTS
HEAT RESISTANT MATERIALS
MATERIALS
MATERIALS TESTING
MECHANICAL PROPERTIES
METALS
STRESSES
TESTING
TRANSITION ELEMENTS
360103* - Metals & Alloys- Mechanical Properties