Influence of Strain Path on Microstructure Evolution of Low Carbon Steels

K. Muszka; Lin Sun; Bradley P. Wynne; Eric J. Palmiere; W. Mark Rainforth

doi:10.4028/www.scientific.net/MSF.638-642.3418

Paper Titles

Monitoring Phase Transition Kinetics in Austempered Ductile Iron (ADI)
p.3394

Alloying Effects on Reverse Transformation to Austenite from Pearlite or Tempered Martensite Structures
p.3400

Grain Refinement Mechanisms of Plain C-Mn Steel by Super Short Interval Multi-Pass Rolling in Stable Austenite Region
p.3406

Friction and Wear Properties of Zr and TiC-Based Cermet Specimens in a Hydrogen Gas Atmosphere
p.3412

Influence of Strain Path on Microstructure Evolution of Low Carbon Steels
p.3418

Temperature Dependence of Austenite Nucleation Site on Reversion of Lath Martensite
p.3424

Influence of High-Mobility Boundaries on the Selective Growth of Goss Grain in Grain-Oriented Electrical Steel
p.3430

High Corrosion Resistance 21%Cr-0.4%Cu Ferritic Stainless Steel Contributing to Resource Conservation
p.3435

Microstructure and Toughness of 1000 MPa High Strength Weld Metal
p.3441

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Influence of Strain Path on Microstructure Evolution of Low Carbon Steels

Abstract:

Changes in strain path represent one of the most important processing parameters that characterise hot metal forming processes. In the present study, the effect of strain path change on dynamic recrystallisation, strain-induced precipitation processes and phase transformation behaviour in plain carbon and Nb-microalloyed steels was investigated. To assess the effect of strain-path change, forward/forward and forward/reverse torsion tests were conducted. It has been shown that the strain reversal delays the dynamic recrystallisation kinetics whereas its effect on strain-induced precipitation process of Nb(C,N) is rather negligible. Also the onset of austenite-ferrite transformation is delayed; its products however doesn’t change significantly. This can be due to the fact that ferrite nucleation density plays the second order role compared to the geometry of deformation.