HOT WORKABILITY CHARACTERISTICS OF 7075 Al/10% SiCp COMPOSITES

Authors

  • Rajamuthamil selvan M Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, TamilNadu-608002, India
  • Ramanathan S Department of Manufacturing Engineering, Annamalai University, Annamalai Nagar, TamilNadu-608002, India

Keywords:

Hot Working Composites, Processing Map, Dynamic Recrystallization

Abstract

An important parameter in the mechanical working of materials is called workability, which is the relative ease with which a metal can be shaped through plastic deformation without the formation of any defect. Workability can be evaluated by means of processing maps, constructed from experimentally generated flow stress variation with respect to strain, strain rate and temperature. The present work is generating processing maps for hot working processes for 7075 Al/10% SiCp composite in the temperature range of 300 to 500 °C and strain rate range of 0.001 to 1 s-1. The processing map exhibits a safe domain of dynamic recrystallization (DRX) with a peak efficiency of power dissipation of about 24% at 400 °C and strain rate of 0. 1s-1. Flow instability occurs due to adiabatic shear bands and flow localizations at higher strain rates above 0.1 s-1 and the corresponding processing conditions are avoided. The safe domains and unsafe domains were validated through microstructural investigations.

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References

Ali Kalkanl and Sencer Yılmaz (2008), “Synthesis and Characterization of Aluminum Alloy 7075 Reinforced with Silicon Carbide Particulates”,Material Design, Vol.29, 775–780.

Lee Kon Bae and Kwon Hoon (2002), “Strength of Al–Zn–Mg–Cu matrix Composite Reinforced with SiC Particles”, Metall. Mater. Trans. A, Vol. 33, 455–465.

Narayana Murty S V S, Nageswara Rao B and Kashyap B P (2005), “Identification of Flow Instabilities in the Processing maps of AISI 304 Stainless Steel”, Journal of Material Processing Technology ,Vol. 166, 268–278.

Lin Y C, Ming-Song Chen and Jue Zhon (2008), “Prediction of 42CrMo Steel Flowstress at High Temperature and Strain Rate”, Mech. Res. Commun. , Vol. 35(3), 142–150.

Ganesan G, Raghukandan K, Karthikeyan R and Pai B C, (2005), “Development of Processing Map for 6061 Al/15% SiCp Composites Through Neural Networks”, Journal of Material Processing Technology, Vol. 166,423–429.

Rao K P, Prasad Y V R K, Hort N and Kainer K U (2008), “Hot Workability Characteristics of Cast and Homogenized Mg–3Sn–1Ca Alloy”, Journal of Material Processing. Technology, Vol. 201, 359– 363.

Prasad Y V R K and Rao K P (2009), “Effect of Homogenization on the Hot Deformation Behavior of Cast AZ31 Magnesium Alloy”, Material Design, Vol. 30, 723–730.

Narayana Murty S V S, Nageswara Rao B and Kash B P (2005), “On the Hot Working Characteristics of 2014 Al–20 vol% Al2O3 Metal Matrix Composite”, Journal of Material Processing Technology, Vol.166, 279–285.

Siva and Prasad O (2002), “Characteristics of Super Plasticity Domain in the Processing Map for Hot Working of as Cast Mg-11.5 Li-1.5 Al Alloy”, Material Science and Engineering A, Vol. 323,270-277.

Prasad Y V R K and Rao K P (2005),“Processing Maps and Rate Controlling Mechanisms of Hot Deformation of Electrolytic Tough Pitch Copper in the Temperature Range 300-950oC”, Material Science and Engineering A, Vol. 391, 141–150.

Seshacharyulu T, Medeiros S C, Morgan J T, Malas J C, Frazier W G and Prasad Y V R K (2000), “Hot Deformation and Microstructural Damage Mechanisms in Extra Low Interstitial (ELI) grade Ti-6Al- 4V”, Material Science and Engineering, Vol. 279, 289–299.

Spigarelli S, Cerri E, Cavaliere P and Evangelista E (2002), “An Analysis of Hot Formability of the 6061+20% Al2O3 Composite by Means of Different Stability Criteria”, Material Science and. Engineering A, Vol. 327, 144–154.

Cavaliere P, Cerri E and Leo P (2004), “Hot Deformation and Processing Maps of a Particulate Reinforced 2618/Al2O3/20p Metal Matrix Composite”, Composites Science and Technology, Vol. 64, 1287–1291.

Rao K P, Ramkumar and Oruganti K (2003), “Study of Hot Deformation Through Energy Storage Concept”, Journal of Material Procesing Technology, Vol. 138, 97–101.

Woei-Shyan Lee, Chi-Feng Lin and Sen-Tay Chang (2000), “Plastic Flow of Tungsten-Based Composite Under Hot Compression”, Journal of Material Processing Technology, Vol. 100, 123–130.

Raghunath B K, Karthikeyan R, Ganesan G and Gupta M (2008), “An Investigation of Hot Deformation Response of Particulate-Reinforced Magnesium + 9% Titanium Composite”, Material Design, Vol. 29, 622–627.

Radhakrishna Bhat B V, Mahajan Y R, Roshan H Md and Prasad Y V R K (1995), “Processing Map for Hot Workability of 6061–10 vol% Al2O3 Metal Matrix Composite”, Material Science and Technology, Vol. 11, 167–173.

Li A B, Huang L J, Meng Q Y , Geng L and Cui X .P (2009), “Hot working of Ti–6Al– 3Mo–2Zr–0.3Si Alloy with Lamellar α+β Starting Structure Using Processing Map”, Mater. Design, Vol.30, 1625–1631.

Zeng W D, Zhou Y G, Zhou J, Yu H Q, Zhang X M and Xu B (2006), “Recent Development of Processing Map Theory”, Rare. Metal. Mater. Eng., Vol.35, 673–677.

Nie S H and Basaran C A (2005), “A Micromechanical Model For Effective Elastic Properties of Particulate Composites With Imperfect Interfacial Bonds”, Int. J. Solids Struct. Vol. 42, 4179–4191

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Published

2011-09-01

How to Cite

[1]
Rajamuthamil selvan M and Ramanathan S, “HOT WORKABILITY CHARACTERISTICS OF 7075 Al/10% SiCp COMPOSITES”, JME, vol. 6, no. 3, pp. 177–184, Sep. 2011.