Fractography of hydrogen-embrittled iron-chromium-nickel alloys

Journal Article · Thu Jan 01 00:00:00 EST 1981 · Microstruct. Sci.; (United States)

OSTI ID:6307187

Caskey, Jr, G R

Tensile specimens of iron-chromium-nickel base alloys were broken in either a hydrogen enviroment or in air following thermal charging with hydrogen. Fracture surfaces were examined by scanning electron microscopy. Fracture morphology of hydrogen-embrittled specimens was characterized by: changed dimple size, twin-boundary parting, transgranular cleavage, and intergranular separation. The nature and extent of the fracture mode changes induced by hydrogen varied systematically with alloy composition and test temperature. Initial microstructure developed during deformation processing and heat treating had a secondary influence on fracture mode.

• Research Organization: E.I. du Pont de Nemours and Co., Aiken, SC
• DOE Contract Number: AC09-76SR00001
• OSTI ID: 6307187
• Journal Information: Microstruct. Sci.; (United States), Vol. 9
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHROMIUM BASE ALLOYS
FRACTOGRAPHY
HYDROGEN EMBRITTLEMENT
IRON BASE ALLOYS
NICKEL BASE ALLOYS
FRACTURE PROPERTIES
SCANNING ELECTRON MICROSCOPY
TEMPERATURE DEPENDENCE
ALLOYS
CHROMIUM ALLOYS
ELECTRON MICROSCOPY
EMBRITTLEMENT
IRON ALLOYS
MECHANICAL PROPERTIES
MICROSCOPY
NICKEL ALLOYS
360103* - Metals & Alloys- Mechanical Properties
360105 - Metals & Alloys- Corrosion & Erosion