MECHANICAL PROPERTIES OF HIGH PURITY FE-C ALLOYS AT LOW TEMPERATURES
Results of the second phase of an investigation on several high-purity, low-carbon irons in the alpha region of the Fe-C diagram which was made in an attempt to correlate brittle behavior, as defined by the Charpy V-notch transition temperature, with yield-point and fracture data from uniaxial tension tests are summarized in this report. All of the alloys tested showed a sharp rise in impact transition temperature corresponding to the precipitation of Fe Sub 3 C. The data also indicate that ferrites with veining have higher transition temperatures than those without veining as quenched from the alpha or unsaturated region. Two of the alloys show a decrease in the transition temperature of the ferritic structures as saturation is approached. Two hypotheses are advanced to explain this: 1) as the temperature is lowered in the alpha region, the concentration of carbon atoms at grain boundaries increases, and 2) carbon segregates at sub-grain as well as at primary boundaries and in some way "strengthens" the sub-grain boundaries so that they assume more of the properties of high-angle grain boundaries.
University of Pennsylvania Law School3400 Chestnut Street
Philadelphia, PA USA 19104
Ship Structure CommitteeNational Academy of Science, 2101 Constitution Avenue, NW
Washington, DC USA 20418
- London, G J
- Spangler, G
- Brick, R M
- Publication Date: 1959-3-31
- Features: References;
- Pagination: 25 p.
- TRT Terms: Alloy steel; Brittleness; Fracture tests; Low temperature; Low temperature materials; Tension tests; Transition point
- Identifier Terms: Ship Structure Committee
- Old TRIS Terms: Charpy tests; Tensile test
- Subject Areas: Marine Transportation; Materials;
- Accession Number: 00331295
- Record Type: Publication
- Source Agency: Ship Structure Committee
- Report/Paper Numbers: SSC- 93 Prog Rpt.
- Contract Numbers: NObs-50062, NObs-72046
- Files: TRIS
- Created Date: May 21 1981 12:00AM