Uniaxial tensile deformation and fracture of dual-phase steels

Technical Report · Mon Jul 01 04:00:00 EDT 1985

OSTI ID:5565771

Su, Y L

The photolithography technique was used to produce the microgrids on the specimen surface in order to study the difference in strain between the hard martensite particles and the soft ferrite matrix, and thus to determine the difference in stress between the two phases. Based on the stress-strain curves of dual-phase steels and direct observation of deformation of martensite particles and investigation of fracture behavior, analytical models were developed to explain the work-hardening behavior and to formulate the expressions for uniform and fracture strains of dual-phase steels. The results show that the uniform strain of dual-phase steels is primarily decided by the properties and volume fraction of the ferrite, but the mechanism and strain of fracture of dual-phase steels are determined by martensite.

• Research Organization: Brown Univ., Providence, RI (USA). Div. of Engineering
• DOE Contract Number: AC02-80ER10556
• OSTI ID: 5565771
• Report Number(s): DOE/ER/10556-106; ON: DE85015034
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBON ADDITIONS
CRYSTAL STRUCTURE
DEFORMATION
FERRITE
FRACTURE PROPERTIES
HARDENING
HARDNESS
IRON ALLOYS
IRON BASE ALLOYS
MARTENSITE
MECHANICAL PROPERTIES
MICROSTRUCTURE
STEELS
STRAIN HARDENING
STRESSES
TENSILE PROPERTIES