Kinetics of f. c. c. [r arrow] b. c. c. heterogeneous martensitic nucleation; 1: The critical driving force for athermal nucleation
- Northwestern Univ., Evanston, IL (United States). Dept. of Materials Science and Engineering
Employing available experimental data for athermal f.c.c. [r arrow] b.c.c. martensitic transformation in binary, ternary and multicomponent Fe-base alloys, a model is developed and tested for the critical driving force at the M[sub s] temperature. Incorporating the theory of solid solution hardening, the authors describe the composition dependence of the athermal frictional work for martensitic interface motion governing the kinetics of barrierless heterogeneous nucleation. The available data suggests that the composition dependence of the athermal frictional work is of the same form as that for slip deformation. The authors have evaluated the athermal strengths of 14 alloying elements Al, C, Co, Cr, Cu, Mn, Mo, N, Nb, Ni, Si, Ti, V and W from the experimental data. Except for Al, Ni and Co, the athermal strengths of the common substitutional alloying elements are similar in magnitude, while the interstitial solutes C and N exert a stronger influence. Previously proposed superposition laws are used to account for the presence of multiple solutes having different athermal strengths. With an improved assessment of the magnetic parameters of alloy systems, the model predicts M[sub s] temperatures within [+-] 40 K for M[sub s] > 300 K where thermal contributions to the frictional work can be neglected.
- DOE Contract Number:
- FG02-88ER45365
- OSTI ID:
- 6989803
- Journal Information:
- Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 42:10; ISSN 0956-7151; ISSN AMATEB
- Country of Publication:
- United States
- Language:
- English
Similar Records
On the interpretation of differential scanning calorimetry results for thermoelastic martensitic transformations: Athermal versus thermally activated kinetics
Time-dependent nature of the athermal martensitic transformations in Fe-Ni-alloys
Related Subjects
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
ALUMINIUM ALLOYS
BCC LATTICES
CARBON ADDITIONS
CHROMIUM ALLOYS
COBALT ALLOYS
COPPER ALLOYS
CRYSTAL LATTICES
CRYSTAL STRUCTURE
CRYSTAL-PHASE TRANSFORMATIONS
CUBIC LATTICES
DEFORMATION
FCC LATTICES
IRON ALLOYS
IRON BASE ALLOYS
MANGANESE ALLOYS
MATHEMATICAL MODELS
MOLYBDENUM ALLOYS
NICKEL ALLOYS
NIOBIUM ALLOYS
NITROGEN ADDITIONS
PHASE TRANSFORMATIONS
PHYSICAL PROPERTIES
SILICON ALLOYS
THERMODYNAMIC PROPERTIES
TITANIUM ALLOYS
TRANSITION TEMPERATURE
TUNGSTEN ALLOYS
VANADIUM ALLOYS