Effects of carbon on intergranular fracture of iron

Conference · Sun Jan 01 04:00:00 EST 1984

OSTI ID:5089945

Shin, K S; Meshii, M

The effect of carbon on the grain boundary strength of iron which had been already reduced by sulfur segregation was investigated by a slow strain-rate tensile test at 77/sup 0/K. The amounts of sulfur and carbon segregation at grain boundaries were controlled by carbon contents and heat treatments of specimens and were determined by Auger electron spectroscopy after in-situ fracture under ultra-high vacuum. It was found that the primary effect of carbon is to displace sulfur from grain boundaries and thus to improve the grain boundary strength by reducing the embrittling effect of sulfur. The second effect of carbon is to increase the resistance to dislocation motion and thus to increase the apparent stress for intergranular fracture.

• Research Organization: Northwestern Univ., Evanston, IL (USA). Dept. of Materials Science and Engineering
• DOE Contract Number: AC02-76ER01367
• OSTI ID: 5089945
• Report Number(s): DOE/ER/01367-155; CONF-8402158-1; ON: DE86001886
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
AUGER ELECTRON SPECTROSCOPY
CARBON
CRYSTAL STRUCTURE
ELECTRON SPECTROSCOPY
ELEMENTS
FRACTURE PROPERTIES
GRAIN BOUNDARIES
IRON
MECHANICAL PROPERTIES
METALS
MICROSTRUCTURE
NONMETALS
SEGREGATION
SPECTROSCOPY
SULFUR
TRANSITION ELEMENTS