Strength of an. cap alpha. -alloy of titanium taking into consideration its hydrogen impregnation

Journal Article · Fri Jan 01 04:00:00 EST 1988 · Sov. Mater. Sci. (Engl. Transl.); (United States)

OSTI ID:6183633

Syshchikov, V I; Smirnova, T A; Prus, A A

Results are presented of an investigation of the influence of the conditions of conduct of an experiment on the appearance of hydrogen embrittlement of PT-7M ..cap alpha..-titanium alloy hydrogen impregnated to various concentrations. Tensile tests of notched and unnotched specimens, impact bend tests, and static three-point bend tests of specimens with a crack were made in a broad temperature range. To determine the fracture toughness, specimens with a center notch and a fatigue crack recommended for finding the critical stress intensity factors and the critical crack opening were used. Metallography was used to determine the dependence of lamellar titanium hydride formations on hydrogen content. The results of calculation of the critical crack opening made it possible to predict the character of failure of cylindrical thin-walled shells of the alloy. Maximum allowable shell thickness, beyond which brittle fracture occurs, could be established from ductile-to-brittle transition curves. The most sensitive methods for determining a tendency toward hydrogen brittleness were impact strength and fracture toughness tests.

• OSTI ID: 6183633
• Journal Information: Sov. Mater. Sci. (Engl. Transl.); (United States), Journal Name: Sov. Mater. Sci. (Engl. Transl.); (United States) Vol. 23:4; ISSN SOMSA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
360105* -- Metals & Alloys-- Corrosion & Erosion
ALLOYS
BENDING
CHEMICAL REACTIONS
CORROSION FATIGUE
CRACK PROPAGATION
DUCTILE-BRITTLE TRANSITIONS
EMBRITTLEMENT
FATIGUE
FRACTURE PROPERTIES
HYDRIDATION
HYDROGEN EMBRITTLEMENT
IMPACT STRENGTH
IMPACT TESTS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
METALLOGRAPHY
NOTCHES
PHYSICAL PROPERTIES
QUANTITY RATIO
STRESS ANALYSIS
STRESS INTENSITY FACTORS
TENSILE PROPERTIES
TESTING
THERMODYNAMIC PROPERTIES
TITANIUM ALLOYS
TITANIUM BASE ALLOYS
TRANSITION TEMPERATURE