Fracture mode transition of iron in hydrogen as a function of grain boundary sulfur

Journal Article · Tue Jan 01 04:00:00 EST 1980 · Scr. Metall.; (United States)

DOI:https://doi.org/10.1016/0036-9748(80)90142-8· OSTI ID:5523441

Bruemmer, S M; Jones, R H; Thomas, M T; Baer, D R

Embrittlement of iron of variable impurity levels and identical thermal histories was shown to be dependent on the sulfur enrichment at grain interfaces and the applied cathodic potential. A fracture mode transition from transgranular ductile rupture to brittle intergranular failure was observed as a function of the grain boundary sulfur concentration. This mode change causes a dramatic loss in ductility at a threshold sulfur content of about 13% of monolayer on the fracture surface. A relationship is suggested between the roles S and H play in reducing boundary strength in iron.

• Research Organization: Battele Pacific Northwest Labs., Richland, WA
• OSTI ID: 5523441
• Journal Information: Scr. Metall.; (United States), Journal Name: Scr. Metall.; (United States) Vol. 14:1; ISSN SCRMB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBON ADDITIONS
CRYOGENIC FLUIDS
CRYSTAL STRUCTURE
DUCTILE-BRITTLE TRANSITIONS
ELEMENTS
FLUIDS
FRACTURE PROPERTIES
GRAIN BOUNDARIES
HYDROGEN
IMPURITIES
IRON
MANGANESE ADDITIONS
MANGANESE ALLOYS
MECHANICAL PROPERTIES
METALLURGICAL EFFECTS
METALS
MICROSTRUCTURE
NITROGEN ADDITIONS
NONMETALS
PHOSPHORUS ADDITIONS
SULFUR
SULFUR ADDITIONS
TRANSITION ELEMENTS