Microstructural Engineering in Eutectoid Steel: A Technological Possibility?

Eutectoid wire rods were subjected to controlled thermo-mechanical processing (TMP). Both increased cooling rate and applied stress during the austenite-to-pearlite decomposition produced significant changes in the microstructure: major increases in the pearlite’s axial alignment and minor decreases...

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Bibliographic Details
Published in:Metallurgical and materials transactions. A, Physical metallurgy and materials science Physical metallurgy and materials science, 2018-05, Vol.49 (5), p.1520-1535
Main Authors: Durgaprasad, A., Giri, S., Lenka, S., Kundu, S., Chandra, S., Mishra, S., Doherty, R. D., Samajdar, I.
Format: Article
Language:English
Subjects:
Alignment
Axial stress
Characterization and Evaluation of Materials
Chemistry and Materials Science
Control rods
Cooling rate
Crystallography
Eutectics
Ferrite
Materials Science
Metallic Materials
Metallurgy
Microstructure
Nanotechnology
Pearlite
Residual stress
Structural Materials
Surfaces and Interfaces
Thermomechanical treatment
Thin Films
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Summary:Eutectoid wire rods were subjected to controlled thermo-mechanical processing (TMP). Both increased cooling rate and applied stress during the austenite-to-pearlite decomposition produced significant changes in the microstructure: major increases in the pearlite’s axial alignment and minor decreases in the interlamellar spacing. The pearlite alignment was correlated with changes in the ferrite crystallographic texture and the state of residual stress. Microstructural engineering, improved axial alignment of pearlite, through controlled TMP gave a fourfold increase in torsional ductility. TMP of eutectoid steel thus appears to have interesting technological possibilities.
ISSN:1073-5623
1543-1940
DOI:10.1007/s11661-018-4501-y