The role of cementite shape in the fracture surface formation of steels embrittled by phosphorus

Journal Article · Fri Jul 15 04:00:00 EDT 1994 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(94)90178-3· OSTI ID:7108721

Yendrzhievshy, B Y ^[1]; Klimkin, P A ^[2]

---

1. Academy of Sciences of the Ukraine, Kiev (Ukraine). Inst. of Metal Physics
2. Academy of Sciences of the Ukraine, Kiev (Ukraine). Institute of Electric Welding

Grain boundary segregation of such impurities as phosphorus, sulfur, etc., are well known as the intergranular embrittling elements in steels. Also segregation is probably the foremost explanation for the formation of intergranular fracture surfaces. However, the fabrication of this type of fracture surface may be effected by a number of parameters including grain size and cementite shape. The interaction of segregated phosphorus and other metalloid impurities, especially carbon, is of particular interest. A number of papers showed site competition between these elements in the grain boundaries. Carbon expels phosphorus from the grain boundaries and changes the fracture mode from intergranular to transgranular. In the present work the authors aimed to compare the influence of shape and distribution of carbide particles on the formation of a brittle fracture surface of steels embrittled by phosphorus. Two kinds of cementite -- spherical and lamellae with two types of spherical cementite distribution: uniform and within grain boundaries -- have been observed.

• OSTI ID: 7108721
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 31:2; ISSN SCRMEX; ISSN 0956-716X
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102 -- Metals & Alloys-- Structure & Phase Studies
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBIDES
CARBON COMPOUNDS
CEMENTITE
DATA
EMBRITTLEMENT
EXPERIMENTAL DATA
FAILURES
FRACTURES
INFORMATION
INTERMETALLIC COMPOUNDS
IRON ALLOYS
IRON BASE ALLOYS
IRON CARBIDES
IRON COMPOUNDS
MATERIALS TESTING
MECHANICAL TESTS
MICROSTRUCTURE
NUMERICAL DATA
STEELS
TESTING
TRANSITION ELEMENT COMPOUNDS