Static recrystallization of austenite and strain induced precipitation kinetics in titanium microalloyed steels

Journal Article · Thu Dec 01 04:00:00 EST 1994 · Acta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-7151(94)90172-4· OSTI ID:6767668

Medina, S F ^[1]; Mancilla, J E ^[2]

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1. Centro Nacional de Investigaciones Metalurgicas, Madrid (Spain)
2. Univ. Autonoma de Puebla (Mexico)

Using torsion tests and applying the back extrapolation method the recrystallized fraction of austenite was measured at two strains (0.20 and 0.35) and several temperatures in three Ti microalloyed steels. Graphical representation of the activation energy vs the inverse of the temperature makes it possible to determine the static recrystallization critical temperature (SRCT) of each steel as a function of the strain. With the results obtained, a model was constructed for the recrystallized fraction both at temperatures above and below the SRCT, and this, together with other equations already published, permits calculation of the residual strain and austenite grain size which the steel is expected to have at the end of rolling and before the [gamma] [yields] [alpha] transformation. Graphs of the recrystallized fraction vs time show the kinetics of strain induced precipitation and PTT diagrams (precipitation-time-temperature) were constructed for the three steels. It is noted that the degree to which the strain affects the precipitation kinetics decreases as the titanium content of the steel is increased.

• OSTI ID: 6767668
• Journal Information: Acta Metallurgica et Materialia; (United States), Journal Name: Acta Metallurgica et Materialia; (United States) Vol. 42:12; ISSN 0956-7151; ISSN AMATEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360102* -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
CRYSTAL-PHASE TRANSFORMATIONS
DATA
ELEMENTS
EXPERIMENTAL DATA
INFORMATION
IRON ALLOYS
IRON BASE ALLOYS
LOW ALLOY STEELS
MATERIALS TESTING
MECHANICAL TESTS
METALLURGICAL EFFECTS
METALS
NUMERICAL DATA
PHASE TRANSFORMATIONS
RECRYSTALLIZATION
STEELS
TEMPERATURE DEPENDENCE
TESTING
TITANIUM
TRANSITION ELEMENTS