Research Papers

Influence of Thermomechanical Parameters on the Hot Deformation Behavior of AA1070

[+] Author and Article Information
H. R. Rezaei Ashtiani

Department of Mechanical Engineering,
Arak University of Technology,
Arak 38181-41167, Iran;
School of Mechanical Engineering Department of
Solid Mechanics,
Iran University Science and Technology,
Narmak, Tehran, Iran
e-mail: hr_rezaei@iust.ac.ir,

H. Bisadi

School of Mechanical Engineering
Department of Solid Mechanics,
Iran University Science and Technology,
Narmak, Tehran, Iran

M. H. Parsa

School of Metallurgy and Materials Engineering,
College of Engineering,
University of Tehran,
Tehran, Iran

1Corresponding author.

Contributed by the Materials Division of ASME for publication in the JOURNAL OF ENGINEERING MATERIALS AND TECHNOLOGY. Manuscript received August 5, 2012; final manuscript received May 12, 2013; published online November 20, 2013. Assoc. Editor: Ashraf Bastawros.

J. Eng. Mater. Technol 136(1), 011004 (Nov 20, 2013) (6 pages) Paper No: MATS-12-1191; doi: 10.1115/1.4025695 History: Received August 05, 2012; Revised May 12, 2013

The experimental stress–strain data from isothermal hot compression tests, in a wide range of temperatures (350–500 °C) and strain rates (0.005–0.5 s−1), were employed to develop constitutive equations in a commercially pure aluminum (AA1070). The effects of temperature and strain rate on the hot deformation behavior were represented by Zener–Hollomon parameter including Arrhenius term. The results show that the hardening rate and flow stress are evidently affected by both deformation temperature and strain rate. The power law, exponential, and hyperbolic sinusoidal types of Zener–Hollomon equations were used to determine the hot deformation behavior of AA1070. The results suggested that the highest correlation coefficient was achieved for the hyperbolic sine law for the studied material. So the proposed deformation constitutive equations can give an accurate and precise estimate of the flow stress for AA1070, which means it can be used for numerical simulation of hot forming processes and for choosing proper forming parameters in engineering practice accurately.

Copyright © 2014 by ASME
Your Session has timed out. Please sign back in to continue.


Lange, K., 1985, Handbook of Metal Forming, McGraw-Hill, New York.
Totten, G. E., and MacKenzie, D. S., 2003, Handbook of Aluminium. Physical Metallurgy and Processes, Vol. 1, Marcel Dekker, New York.
Lin, Y. C., Xia, Y.-C., Xiao-Min, C., and Ming-Song, C., 2010, “Constitutive Descriptions for Hot Compressed 2124-T851 Aluminum Alloy Over a Wide Range of Temperature and Strain Rate,” Comp. Mater. Sci., 50, pp. 227–233. [CrossRef]
Mandal, S., Rakesh, V., Sivaprasad, P. V., and Kasiviswanathan, K. V., 2009, “Constitutive Equations to Predict High Temperature Flow Stress in a Ti-Modified Austenitic Stainless Steel,” Mater. Sci. Eng., A, 500, pp. 114–121. [CrossRef]
Lin, Y. C., and Xiao-Min, C., 2011, “A Critical Review of Experimental Results and Constitutive Descriptions for Metals and Alloys in Hot Working,” Mater Des., 32(4), 1733–1759. [CrossRef]
Jonas, J., Sellars, C. M., and Tegart, W. J. McG., 1969, “Strength and Structure Under Hot Working Conditions,” Int. Metall. Rev., 14(1), pp. 1–24. [CrossRef]
Lin, Y. C., Chen, M. S., and Zhong, J., 2008, “Effect of Temperature and Strain Rate on the Compressive Deformation Behavior of 42CrMo Steel,” J. Mater. Process. Technol., 205, pp. 308–315. [CrossRef]
McQueen, H. J., and Ryan, N. D., 2002, “Constitutive Analysis in Hot Working,” Mater. Sci. Eng. A, 322(1-2), pp. 43–63. [CrossRef]
Takuda, H., Fujimoto, H., and Hatta, N., 1998, “Modelling on Flow Stress of Mg–Al–Zn Alloys at Elevated Temperatures,” Mater. Process. Technol., 80/81, pp. 513–516. [CrossRef]
Lee, W. S., and Lin, M. T., 1997, “The Effects of Strain Rate and Temperature on the Compressive Deformation Behaviour of Ti6Al4V Alloy,” Mater. Process. Technol., 71, pp. 235–246. [CrossRef]
Zhan, M. Y., Chen, Z. H., Zhang, H., and Xia, W. J., 2006, “Flow Stress Behavior of Porous FVS0812 Aluminum Alloy During Hot-Compression,” Mech. Res. Commun., 3, pp. 508–514. [CrossRef]
Shi, H., McLaren, A. J., Sellars, C. M., Shahani, R., and Bolingbroke, R., 1997, “Hot Plane Strain Compression Testing in Al-1Mg,” Mater. Sci. Technol., 13, pp. 210–216. [CrossRef]
Sellars, C. M., and McTegart, W. J., 1996, “On the Mechanism of Hot Deformation,” Acta Metall., 14(9), pp. 1136–1138. [CrossRef]
Mirzadeh, H., Najafizadeh, A., and Moazeney, M., 2009, “Flow Curve Analysis of 17-4 PH Stainless Steel Under Hot Compression Test,” Metall. Mater. Trans. A, 40, pp. 2950–2958. [CrossRef]
Verlinden, B., Driver, J., Samajdar, I., and Doherty, D., 2007, Thermo-Mechanical Processing of Metallic Materials, 1st ed., Elsevier, Amsterdam.
Stewart, G. R., Jonas, J. J., and Montheillet, F., 2004, “Kinetics and Critical Conditions for the Initiation of Dynamic Recrystallization in 304 Stainless Steel,” ISIJ Int., 44/9, pp. 1581–1589. [CrossRef]
Brown, S. B., Kim, K. H., and Anand, L., 1989, “An Internal Variable Constitutive Model for Hot Working of Metals,” Int. J. Plast., 5, pp. 95–130. [CrossRef]
Zener, C., and Hollomon, H., 1944, “Effect of Strain-Rate Up on the Plastic Flow of Steel,” J Appl. Phys., 15, pp. 22–27. [CrossRef]
Chen, Z. Y., Xu, S. Q., and Dong, X. H., 2008, “Deformation Behavior of AA6063 Aluminum Alloy After Removing Friction Effect Under Hot Working Conditions,” Acta Metall. Sin., 21(6), pp. 451–458. [CrossRef]
Yang, H., Li, Z. H., and Zhang, Z. L., 2006, “Investigation on Zener–Hollomon Parameter in the Warm-Hot Deformation Behavior of 20CrMnTi,” J. Zhejiang Univ., Sci., 7, pp. 1453–1460. [CrossRef]
Sakai, T., 1995, “Dynamic Recrystallization Microstructures Under Hot Working Conditions,” Mater. Process. Technol., 53, pp. 349–361. [CrossRef]


Grahic Jump Location
Fig. 1

PLM microstructure of AA1070 polycrystalline specimen

Grahic Jump Location
Fig. 2

Thermomechanical schematic used to compress samples that represents processing conditions

Grahic Jump Location
Fig. 3

True stress–true strain curves for various temperatures at different strain rate of (a) 0.005 s−1, (b) 0.05 s−1, and (c) 0.5 s−1

Grahic Jump Location
Fig. 4

Work hardening rate (θ) versus flow stress (σ) at strain rate of (a) 0.005 s−1, (b) 0.05 s−1, and (c) 0.5 s−1

Grahic Jump Location
Fig. 8

Correlation between the experimental and predicted flow stress data from the developed constitutive equation

Grahic Jump Location
Fig. 7

The variation of LnZ with (a) Ln σp, (b) σp, and (c) Ln sinh (ασp) to obtain the consequence regression constant between the peak stress (σp) and Z

Grahic Jump Location
Fig. 6

Evaluating the value of (a) n by fitting ln[sinh(ασp)]−lnɛ·, (b) Q by fitting ln[sinh(ασp)] − 1/T

Grahic Jump Location
Fig. 5

Evaluating the value of (a) n' by fitting lnσp−lnɛ·, (b) β by fitting σp−lnɛ·



Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related Journal Articles
Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In