Paper Titles
Lattice Relaxation in Ni-P Amorphous Alloy Accompanied with Growth of Ni3P Nanocrystals
p.1363
Effect of O2 Partial Pressure on Magnetic Properties of Alloys CoFe-Rich Nanocrystalline Thin Films
p.1367
Crystallization Kinetics and Texture Evolution in Iron-Based Amorphous Alloys under a Magnetic Field
p.1371
Crystallographic Texture Change of Pilgered Zirconium Alloy Tubes with Heat Treatment
p.1379
High Temperature Deformation of a Structural Steel
p.1383
Recrystallization of Ferric Oxyhydroxides Consisting of FeO6 Octahedral Units via Aqueous Solution
p.1389
Effect of Initial Texture on the Deformed Microstructure of IF Steel
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Effects of Initial Texture on Drawing and Recrystallization Characteristics of Gold Bonding Wire
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On the Relationship between Pseudoelasticity and Texture Evolution in Ti-26Nb-0.5Si Alloy
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High Temperature Deformation of a Structural Steel

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Abstract:

The mechanical behavior of a fire resistant steel was studied by means of tensile tests performed in the temperature interval from 25 to 600oC, at strain rates from 10-4 to 10-2 s-1, aiming at analyzing the role of alloying elements in the dynamic strain aging (DSA) phenomena occurring in this steel. Typical features of DSA were observed: serrated flow (the Portevin-LeChatelier – PLC effect), the presence of a maximum and a minimum in ultimate tensile strength and elongation versus temperature curves, respectively and a plateau in yield strength versus temperature curves. Apparent activation energies were calculated based on the onset of PLC effect and the maximum in ultimate tensile strength. Results suggest that changes in mechanical properties associated with DSA in the fire resistant steel are related to the dynamic interaction of C-substitutional dipoles and dislocations.

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Periodical:

Materials Science Forum (Volumes 558-559)

Pages:

1383-1388

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.558-559.1383

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Cite this paper

Online since:

October 2007

Authors:

B.M. Gonzalez, O.J. Santos, C.S.B. Castro, Dagoberto Brandão Santos, Ronaldo Barbosa

Keywords:

Dynamic Strain Aging (DSA), Fire-Resistant Steel, Structural Steel

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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