High Temperature Deformation Behavior of 4340 Steel: Activation Energy Calculation and Modeling of Flow Response

被引：1

作者：

S V Sajadifar ^{[1
]}

G G Yapici ^{[1
]}

M Ketabchi ^{[2
]}

B Bemanizadeh ^{[3
]}

机构：

[1] Mechanical Engineering Department,Ozyegin University

[2] Mining and Metallurgical Engineering Department,Amirkabir University of Technology

[3] Islamic Azad University,Karaj Branch

来源：

Journal of Iron and Steel Research(International) | 2013年 / 20卷 / 12期

关键词：

4340steel; hot deformation; activation energy; dynamic recrystallization; modeling; strain rate sensitivity;

D O I：

10.13228/j.boyuan.issn1006-706x.2013.12.014

中图分类号：

TG142.1 [钢的组织与性能];

学科分类号：

080502 ;

摘要：

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 4340steel were investigated.Namely,hot compression tests on 4340steel have been performed in a temperature range of 900-1200℃and a strain rate range of 0.01-1s-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 4340steel 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 4340steel,respectively.The validity of the model was demonstrated by demonstrating the experimental data with the numerical results with reasonable agreement.

引用

页码：133 / 139

页数：7

共 13 条

[1]

On the Microstructural Evolution of 4130 Steel During Hot Compression.[J].Mohamadreza Nourani;Vahid Sajadifar;Mostafa Ketabchi;Abbas S. Milani;Spiro Yannacopoulos.Recent Patents on Materials Science.2012, 1

[2]

Hot deformation behavior of 60Nitinol (Ni 60<ce:hsp sp="0.25"/>wt% –Ti 40<ce:hsp sp="0.25"/>wt% ) alloy: Experimental and computational studies.[J].K. Dehghani;A.A. Khamei.Materials Science & Engineering A.2009, 3

[3] High-Temperature Deformation Behavior of Ti-6Al-4V Alloy without and with Hydrogenation Content of 0.27 wt.% [J].

Niu, Yong ;

Li, Miaoquan ;

Hou, Hongliang ;

Wang, Yaoqi ;

Lin, Yingying .

JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE, 2010, 19 (01) :59-63

[4]

Effect of temperature and strain rate on the compressive deformation behavior of 42CrMo steel.[J].Y.C. Lin;Ming-Song Chen;Jue Zhong.Journal of Materials Processing Tech..2007, 1

[5]

Dynamic recrystallization behavior and microstructural evolution in a Mn–Cr gear steel.[J].B.X. Wang;X.H. Liu;G.D. Wang.Materials Science & Engineering A.2004, 1

[6]

Strain-induced grain evolution in polycrystalline copper during warm deformation.[J].A. Belyakov;W. Gao;H. Miura;T. Sakai.Metallurgical and Materials Transactions A.1998, 12

[7]

Dynamic recrystallization under warm deformation of a 304 type austenitic stainless steel.[J].A. Belyakov;H. Miura;T. Sakai.Materials Science & Engineering A.1997, 1

[8] Temperature dependence of the rate sensitivity and its effect on the activation energy for high-temperature flow [J].

Montheillet, F ;

Jonas, JJ .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 1996, 27 (10) :3346-3348

[9]

Dynamic recrystallization microstructures under hot working conditions.[J].Taku Sakai.Journal of Materials Processing Tech..1995, 1

[10]

Dynamic Recrystallization in Austenitic Stainless Steels.[J].McQueen H.J.;Ryan N.D.;Evangelista E..Materials Science Forum.1993, 113

← 1 2 →