Effect of sulfur segregation and hydrogen charging on intergranular fracture of iron

Journal Article · Sat Oct 01 04:00:00 EDT 1983 · Acta Metall.; (United States)

DOI:https://doi.org/10.1016/0001-6160(83)90153-0· OSTI ID:6401205

Shin, K S; Meshu, M

The effect of sulfur segregation and hydrogen charging on grain boundary strength was investigated by a slow strain-rate tensile test at 77 K. The amount of sulfur segregation at grain boundaries was controlled by varying the initial purity of specimens and quenching temperature and was determined by Auger electron spectroscopy after in situ fracture under ultra-high vacuum. The effect of hydrogen on grain boundary strength was examined at various grain boundary sulfur and/or hydrogen contents. The deleterious effects were independent and additive. The reversible effect is attributed to the reduction in the cohesive strength of grain boundaries due to atomic hydrogen whereas the irreversible effect is attributed to the damage due to molecular hydrogen precipitation.

• Research Organization: Department of Materials Science and Engineering, Northwestern University, Evanston, IL
• OSTI ID: 6401205
• Journal Information: Acta Metall.; (United States), Journal Name: Acta Metall.; (United States) Vol. 31:10; ISSN AMETA
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
AUGER ELECTRON SPECTROSCOPY
CHEMICAL COMPOSITION
CRYSTAL STRUCTURE
DESTRUCTIVE TESTING
ELECTRON SPECTROSCOPY
ELEMENTS
FRACTURE MECHANICS
GRAIN BOUNDARIES
HYDROGEN
IRON
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICS
METALS
MICROSTRUCTURE
NONMETALS
QUENCHING
SEGREGATION
SPECTROSCOPY
STRAIN RATE
SULFUR
SULFUR CONTENT
TESTING
TRANSITION ELEMENTS
VACUUM SYSTEMS