Effect of prior cold work on the martensite transformation in SAE 52100

Journal Article · Wed Feb 01 04:00:00 EST 1984 · Metall. Trans., A; (United States)

DOI:https://doi.org/10.1007/BF02645115· OSTI ID:6552559

Beswick, J

Numerous publications refer to the phase transformations and properties of SAE 52100 steel, and this paper concerns itself with the effect of prior cold deformation on the martensitic hardening response. The A /SUB c1/ and A /SUB c3/ temperatures are lowered due to cold work as is the M /SUB s/ with a resultant increase in the retained austenite content for a given hardening cycle. Significantly, the prior cold deformation results in a refinement of the austenite grain size. The low angle dislocation cells produced by the cold deformation recover during the heating to the austenitizing temperature to form fine ferrite subgrains. The intersections of the fine ferrite subgrains with the spheroidal carbides in the soft annealed microstructures are preferential sites for nucleation of austenite. This results in finer austenite grains, which produces accelerated carbide dissolution and austenite alloy enrichment compared to unworked, soft annealed structures. The mechanism for the accelerated austenitization is significant in predicting heat treatment response from published phase transformation data for SAE 52100 steel.

• Research Organization: SFK Engineering and Research B.V., Nieuwegen
• OSTI ID: 6552559
• Journal Information: Metall. Trans., A; (United States), Journal Name: Metall. Trans., A; (United States) Vol. 15A:2; ISSN MTTAB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
AUSTENITE
CARBIDES
CARBON ADDITIONS
CARBON COMPOUNDS
COLD WORKING
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
DEFORMATION
FABRICATION
FERRITE
GRAIN REFINEMENT
HEAT TREATMENTS
IRON ALLOYS
IRON BASE ALLOYS
MARTENSITE
MATERIALS WORKING
MICROSTRUCTURE
NUCLEATION
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
STEELS
TEMPERATURE EFFECTS
THERMODYNAMIC PROPERTIES
TRANSITION TEMPERATURE