Effect of microstructural features on ductility in hypo-eutectoid steels

Ductility in hypo-eutectoid steels is significantly influenced by the prior austenite grain sizes, interlamelar spacing and carbon content. In ferrite-pearlite microstructures, a small increase in ductility accompanies with the reduction of the pro-eutectoid ferrite content due to the reduction of f...

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Bibliographic Details
Published in:Scripta materialia 1999-08, Vol.41 (6), p.605-610
Main Authors: Bae, Chul Min, Nam, Won Jong, Lee, Chong Soo
Format: Article
Language:English
Subjects:
Applied sciences
Cross-disciplinary physics: materials science
rheology
Ductility
Exact sciences and technology
Fatigue, corrosion fatigue, embrittlement, cracking, fracture and failure
Fatigue, embrittlement, and fracture
Materials science
Metals. Metallurgy
Physics
Scanning electron microscopy (SEM)
Steels
Treatment of materials and its effects on microstructure and properties
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Summary:Ductility in hypo-eutectoid steels is significantly influenced by the prior austenite grain sizes, interlamelar spacing and carbon content. In ferrite-pearlite microstructures, a small increase in ductility accompanies with the reduction of the pro-eutectoid ferrite content due to the reduction of ferrite/pearlite interface area which acts as the crack initiation site. In fully pearlitic microstructures, ductility increases with decreasing carbon content, volume fraction of cementite, interlamellar spacing and the prior austenite grain size. Results for Fe-0.52C are compared with those for Fe-0.82C.
ISSN:1359-6462
1872-8456
DOI:10.1016/S1359-6462(99)00200-6