Creep cavitation and grain boundary structure in type 304 stainless steel

Journal Article · Thu May 01 04:00:00 EDT 1986 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(86)90069-6· OSTI ID:7010063

Don, J; Majumdar, S

Grain boundary cavitation in Type 304 stainless steel under creep loading was investigated. Scanning electron microscopy observations showed that cavitation varied among different grain boundaries even when similarly oriented to stress direction. Changes in cavitation were also observed across twin boundaries intersecting a grain boundary facet. The correlation between cavity density and boundary structure was characterized by high voltage electron microscopy and Kikuchi patterns. The results are analyzed in the light of modern grain boundary models. In general, cavities were found on most random high-angle boundaries, whereas coincident site lattice (CSL) boundaries tended to resist cavitation. Of the total boundaries (excluding twins), 53% were CSL boundaries; this percentage greatly exceeds available theoretical predictions based on random grain orientation.

• Research Organization: Dept. of Mechanical Engineering, Southern Illinois Univ., Carbondale, IL (US)
• OSTI ID: 7010063
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 34:5; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
CAVITATION
CHROMIUM ALLOYS
CHROMIUM STEELS
CHROMIUM-NICKEL STEELS
CORROSION RESISTANT ALLOYS
CREEP
CRYSTAL STRUCTURE
ELECTRON MICROSCOPY
GRAIN BOUNDARIES
GRAIN ORIENTATION
HEAT RESISTANT MATERIALS
HEAT RESISTING ALLOYS
IRON ALLOYS
IRON BASE ALLOYS
MATERIALS
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MICROSCOPY
MICROSTRUCTURE
NICKEL ALLOYS
ORIENTATION
SCANNING ELECTRON MICROSCOPY
STAINLESS STEEL-304
STAINLESS STEELS
STEELS
STRESS ANALYSIS
STRUCTURAL CHEMICAL ANALYSIS