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Published in:
19-06-2018 | Communication
Thermal Activation Analysis for Higher-Temperature Deformation of Gamma-Iron
Published in: Metallurgical and Materials Transactions A | Issue 8/2018
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Abstract
Recent extension of Zerilli–Armstrong (Z–A) constitutive relations to higher temperature is assessed using yield strength measurements on 0.09 C steel covering the initial deformation behaviors of metastable and stable γ-iron phases. Descriptions of temperature dependence of yield stress; stress-dependent activation energy; and, activation area agree with the Z–A formulation. The relatively weaker thermal dependence of fcc strain hardening compared to a stronger thermal dependence of yield stress for bcc metals is pointed out.