High temperature deformation behavior of 4340 steel: activation energy calculation and modeling of flow

Name: High temperature deformation behavior of 4340 steel: activation energy calculation and modeling of flow
Author: Sajadifar, Seyed Vahid, Yapıcı, Güney Güven, Ketabchi, M., Bemanizadeh, B.

İsim	High temperature deformation behavior of 4340 steel: activation energy calculation and modeling of flow
Yazar	Sajadifar, Seyed Vahid, Yapıcı, Güney Güven, Ketabchi, M., Bemanizadeh, B.
Basım Tarihi:	2013-12
Basım Yeri	- Elsevier
Konu	4340 steel, Hot deformation, Activation energy, Dynamic recrystallization, Modeling, Strain rate sensitivity
Tür	Süreli Yayın
Dil	İngilizce
Dijital	Evet
Yazma	Hayır
Kütüphane:	Özyeğin Üniversitesi
Demirbaş Numarası	1006-706X
Kayıt Numarası	44844623-9cc9-4d23-9084-4f138dbb325b
Lokasyon	Mechanical Engineering
Tarih	2013-12
Notlar	Due to copyright restrictions, the access to the full text of this article is only available via subscription.
Örnek Metin	The 4340 steel is extensively utilized in several industries including automotive and aerospace for manufacturing a large number of structural components. Due to the importance of thermo-mechanical processing in the production of steels, the dynamic recrystallization (DRX) characteristics of 4340 steel were investigated. Namely, hot compression tests on 4340 steel have been performed in a temperature range of 900–1200 °C and a strain rate range of 0. 01–1 s−1 and the strain of up to 0. 9. The resulting flow stress curves show the occurrence of dynamic recrystallization. The flow stress values decrease with the increase of deformation temperature and the decrease of strain rate. The microstructure of 4340 steel after deformation has been studied and it is suggested that the evolution of DRX grain structures can be accompanied by considerable migration of grain boundaries. The constitutive equations were developed to model the hot deformation behavior. Finally based on the classical stress-dislocation relations and the kinematics of the dynamic recrystallization; the flow stress constitutive equations for the dynamic recovery period and dynamic recrystallization period were derived for 4340 steel, respectively. The validity of the model was demonstrated by demonstrating the experimental data with the numerical results with reasonable agreement.
DOI	10.1016/S1006-706X(13)60226-5
Cilt	20

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High temperature deformation behavior of 4340 steel: activation energy calculation and modeling of flow

Yazar Sajadifar, Seyed Vahid, Yapıcı, Güney Güven, Ketabchi, M., Bemanizadeh, B.

Basım Tarihi 2013-12

Basım Yeri - Elsevier

Konu 4340 steel, Hot deformation, Activation energy, Dynamic recrystallization, Modeling, Strain rate sensitivity

Tür Süreli Yayın

Dil İngilizce

Dijital Evet

Yazma Hayır

Kütüphane Özyeğin Üniversitesi

Demirbaş Numarası 1006-706X

Kayıt Numarası 44844623-9cc9-4d23-9084-4f138dbb325b

Lokasyon Mechanical Engineering

Tarih 2013-12

Notlar Due to copyright restrictions, the access to the full text of this article is only available via subscription.

Örnek Metin The 4340 steel is extensively utilized in several industries including automotive and aerospace for manufacturing a large number of structural components. Due to the importance of thermo-mechanical processing in the production of steels, the dynamic recrystallization (DRX) characteristics of 4340 steel were investigated. Namely, hot compression tests on 4340 steel have been performed in a temperature range of 900–1200 °C and a strain rate range of 0. 01–1 s−1 and the strain of up to 0. 9. The resulting flow stress curves show the occurrence of dynamic recrystallization. The flow stress values decrease with the increase of deformation temperature and the decrease of strain rate. The microstructure of 4340 steel after deformation has been studied and it is suggested that the evolution of DRX grain structures can be accompanied by considerable migration of grain boundaries. The constitutive equations were developed to model the hot deformation behavior. Finally based on the classical stress-dislocation relations and the kinematics of the dynamic recrystallization; the flow stress constitutive equations for the dynamic recovery period and dynamic recrystallization period were derived for 4340 steel, respectively. The validity of the model was demonstrated by demonstrating the experimental data with the numerical results with reasonable agreement.

DOI 10.1016/S1006-706X(13)60226-5

Cilt 20