A new multiscale modeling approach is proposed to predict the contributions of dynamic strain aging (DSA) and the resulting negative strain rate sensitivity (NSRS) on the unusual strain-hardening response of Hadfield steel (HS). Mechanical response of HS was obtained from monotonic and strain rate jump experiments under uniaxial tensile loading within the 10−4 to 10−1 s−1 strain rate range. Specifically, a unique strain-hardening model was proposed that incorporates the atomic-level local instabilities imposed upon by the pinning of dislocations by diffusing carbon atoms to the classical Voce hardening. The novelty of the current approach is the computation of the shear stress contribution imposed on arrested dislocations leading to DSA at the atomic level, which is then implemented to the overall strain-hardening rule at the microscopic level. The new model not only successfully predicts the role of DSA and the resulting NSRS on the macroscopic deformation response of HS but also opens the venue for accurately predicting the deformation response of rate-sensitive metallic materials under any given loading condition.
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July 2016
Research-Article
Incorporation of Dynamic Strain Aging Into a Viscoplastic Self-Consistent Model for Predicting the Negative Strain Rate Sensitivity of Hadfield Steel
B. Bal,
B. Bal
Advanced Materials Group (AMG),
Department of Mechanical Engineering,
Koç University,
Sarıyer, İstanbul 34450, Turkey
Department of Mechanical Engineering,
Koç University,
Sarıyer, İstanbul 34450, Turkey
Search for other works by this author on:
B. Gumus,
B. Gumus
Advanced Materials Group (AMG),
Department of Mechanical Engineering,
Koç University,
Sarıyer, İstanbul 34450, Turkey
Department of Mechanical Engineering,
Koç University,
Sarıyer, İstanbul 34450, Turkey
Search for other works by this author on:
D. Canadinc
D. Canadinc
Advanced Materials Group (AMG),
Department of Mechanical Engineering,
Koç University,
Sarıyer,
İstanbul 34450, Turkey
e-mail: dcanadinc@ku.edu.tr
Department of Mechanical Engineering,
Koç University,
Sarıyer,
İstanbul 34450, Turkey
e-mail: dcanadinc@ku.edu.tr
Search for other works by this author on:
B. Bal
Advanced Materials Group (AMG),
Department of Mechanical Engineering,
Koç University,
Sarıyer, İstanbul 34450, Turkey
Department of Mechanical Engineering,
Koç University,
Sarıyer, İstanbul 34450, Turkey
B. Gumus
Advanced Materials Group (AMG),
Department of Mechanical Engineering,
Koç University,
Sarıyer, İstanbul 34450, Turkey
Department of Mechanical Engineering,
Koç University,
Sarıyer, İstanbul 34450, Turkey
D. Canadinc
Advanced Materials Group (AMG),
Department of Mechanical Engineering,
Koç University,
Sarıyer,
İstanbul 34450, Turkey
e-mail: dcanadinc@ku.edu.tr
Department of Mechanical Engineering,
Koç University,
Sarıyer,
İstanbul 34450, Turkey
e-mail: dcanadinc@ku.edu.tr
1Corresponding author.
Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received November 17, 2015; final manuscript received March 4, 2016; published online May 10, 2016. Assoc. Editor: Antonios Kontsos.
J. Eng. Mater. Technol. Jul 2016, 138(3): 031012 (8 pages)
Published Online: May 10, 2016
Article history
Received:
November 17, 2015
Revised:
March 4, 2016
Citation
Bal, B., Gumus, B., and Canadinc, D. (May 10, 2016). "Incorporation of Dynamic Strain Aging Into a Viscoplastic Self-Consistent Model for Predicting the Negative Strain Rate Sensitivity of Hadfield Steel." ASME. J. Eng. Mater. Technol. July 2016; 138(3): 031012. https://doi.org/10.1115/1.4033072
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