Tensile behavior of ferritic ductile cast iron
Samples from eight heats were tested in the as cast condition, and in a heat treated state that produced a fully ferritic matrix. Tensile ductility was increased, and the ductile-to-brittle transition (as measured by Charpy impact testing) was shifted to lower temperatures as a result of the elimination of carbide by heat treatment. A multiple linear regression method was used to determine mathematical models showing the relationship between tensile properties and composition and microstructure. Strength (both yield and ultimate tensile) is dependent primarily on composition. Tensile ductility (as measured by elongation and reduction in area) is governed by a combination of composition and microstructure. Strength and ductility for ferritic ductile cast irons are thus, to some degree, independent, and therefore increases in ductility do not necessarily have to come at the expense of strength.
- Research Organization:
- Sandia National Labs., Albuquerque, NM (USA)
- DOE Contract Number:
- AC04-76DP00789
- OSTI ID:
- 5760712
- Report Number(s):
- SAND-86-0470; ON: DE86010630
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBIDES
CARBON COMPOUNDS
CAST IRON
CRYSTAL STRUCTURE
DUCTILITY
HEAT TREATMENTS
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
IRON CARBIDES
IRON COMPOUNDS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
MICROSTRUCTURE
TENSILE PROPERTIES
TESTING
TRANSITION ELEMENT COMPOUNDS
360103* -- Metals & Alloys-- Mechanical Properties
ALLOYS
CARBIDES
CARBON COMPOUNDS
CAST IRON
CRYSTAL STRUCTURE
DUCTILITY
HEAT TREATMENTS
IMPACT TESTS
IRON ALLOYS
IRON BASE ALLOYS
IRON CARBIDES
IRON COMPOUNDS
MATERIALS TESTING
MECHANICAL PROPERTIES
MECHANICAL TESTS
MICROSTRUCTURE
TENSILE PROPERTIES
TESTING
TRANSITION ELEMENT COMPOUNDS