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Influence of carbon partitioning kinetics on final Austenite fraction during quenching and partitioning

Journal Article · · Scripta Materialia
 [1];  [2];  [2];  [3];  [4];  [5]
  1. Los Alamos National Laboratory
  2. COLORADO SCHOOL OF MINES
  3. PONTIFFCIA UNIV
  4. UNIV OF LEEDS
  5. IMDEA-MATERIALES, MADRID
+ Show Author Affiliations

The quenching and partitioning (Q&P) process is a two-stage heat-treatment procedure proposed for producing steel microstructures that contain carbon-enriched retained austenite. In Q&P processing, austenite stabilization is accomplished by carbon partitioning from supersaturated martensite. A quench temperature selection methodology was developed to predict an optimum process quench temperature; extension of this methodology to include carbon partitioning kinetics is developed here. Final austenite fraction is less sensitive to quench temperature than previously predicted, in agreement with experimental results.

Research Organization:
Los Alamos National Laboratory (LANL)
Sponsoring Organization:
DOE
DOE Contract Number:
AC52-06NA25396
OSTI ID:
956591
Report Number(s):
LA-UR-09-01639; LA-UR-09-1639
Journal Information:
Scripta Materialia, Journal Name: Scripta Materialia; ISSN 1359-6462; ISSN SCMAF7
Country of Publication:
United States
Language:
English

References (9)

Escape of carbon from ferrite plates in austenite journal July 1993
The effect of structure on the deformation of as-quenched and tempered martensite in an Fe-0.2 pct C alloy journal December 1976
Carbon partitioning to austenite from martensite or bainite during the quench and partition (Q&P) process: A critical assessment journal January 2008
Carbon partitioning into austenite after martensite transformation journal May 2003
Partitioning of carbon from supersaturated plates of ferrite, with application to steel processing and fundamentals of the bainite transformation journal June 2004
A general equation prescribing the extent of the austenite-martensite transformation in pure iron-carbon alloys and plain carbon steels journal January 1959
Effect of Retained Austenite Stabilized via Quench and Partitioning on the Strain Hardening of Martensitic Steels journal July 2008
Model for the interaction between interface migration and carbon diffusion during annealing of martensite–austenite microstructures in steels journal July 2008
Packet microstructure in Fe-0.2 pct C martensite journal March 1974

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Related Subjects

36 MATERIALS SCIENCE
AUSTENITE
CARBON
HEAT TREATMENTS
KINETICS
MARTENSITE
MICROSTRUCTURE
PROCESSING
QUENCHING
STABILIZATION
STEELS
TEMPERATURE DEPENDENCE