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Effect of Microalloying Elements (B, Nb, V and Ti) on the Strain Hardening Behavior of High-Manganese TWIP Steels.

Published online by Cambridge University Press:  28 February 2012

F. Reyes-Calderón ,
I. Mejía  and
J.M. Cabrera
F. Reyes-Calderón
Affiliation:
Instituto de Investigaciones Metalúrgicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio “U-5”, Ciudad Universitaria. 58060-Morelia, Michoacán. México. fpacor@yahoo.com.mx, imejia@umich.mx.
I. Mejía
Affiliation:
Instituto de Investigaciones Metalúrgicas, Universidad Michoacana de San Nicolás de Hidalgo, Edificio “U-5”, Ciudad Universitaria. 58060-Morelia, Michoacán. México. fpacor@yahoo.com.mx, imejia@umich.mx.
J.M. Cabrera
Affiliation:
Departament de Ciència del Materials i Enginyeria Metal·lúrgica, ETSEIB, Universitat Politècnica de Catalunya, Av. Diagonal 647. 08028-Barcelona, Spain. jose.maria.cabrera@upc.edu. Fundació CTM Centre Tecnològic, Av. de les Bases de Manresa 1. 08242-Manresa (Barcelona), Spain.
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Abstract

The present research work analyses the influence of microalloying elements (B, Nb, V and Ti) on the tensile strength and the strain hardening behavior of a high-manganese TWIP steel. The analysis was carried out by means of true stress-true strain curves derived from uniaxial tension tests. The work hardening exponent was determined by using the Hollomon and differential Crussard-Jaoul models. Metallographic characterization was carried out to determine the metallurgical changes associated with n values. The results indicate that the Hollomon analysis results in strain hardening exponent values up to 0.46. On the other hand, the differential Crussard-Jaoul analysis establishes a clear distinction of n value for two stages of plastic deformation which are determined by a sharp slope change in the plot of ln(dσ/dε)-lnε.

Type
Articles
Information
MRS Online Proceedings Library (OPL) , Volume 1373: Symposium S4 – Advanced Structural Materials—2011 , 2012 , imrc-1373-s4-13
Copyright
Copyright © Materials Research Society 2012

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References

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