Low temperature deformation behavior of an electromagnetically bulged 5052 aluminum alloy

The fundamental understanding of the deformation behavior of electromagnetically formed metallic components under extreme conditions is important. Here, the effect of low temperature on the deformation behavior of an electromagnetically-bulged 5052 aluminum alloy was investigated through uniaxial tension. We found that the Portevin-Le Chatelier Effect, designated by the serrated characteristic in stress-strain curves, continuously decays until completely disappears with decreasing temperature. The physical origin of the phenomenon is rationalized on the basis of the theoretical analysis and the Monte Carlo simulation, which reveal an increasing resistance to dislocation motion imposed by lowering temperature. The dislocations are captured completely by solute atoms at −50 °C, which results in the extinction of Portevin-Le Chatelier. The detailed mechanism responsible for this process is further examined through Monte Carlo simulation.

[1]  Ashish Kapoor,et al.  Modeling of the electromagnetic forming of sheet metals: state-of-the-art and future needs , 2003 .

[2]  J. Embury,et al.  Effect of type-B Portevin–Le Chatelier bands on the onset of necking in uniaxial tension of strip cast AA5754 sheets , 2005 .

[3]  A. Zeghloul,et al.  Analysis of Portevin-Le Chatelier serrations of type Bin Al–Mg , 2004 .

[4]  J. Robson,et al.  The Effectiveness of Surface Coatings on Preventing Interfacial Reaction During Ultrasonic Welding of Aluminum to Magnesium , 2013, Metallurgical and Materials Transactions A.

[5]  Michael J. Worswick,et al.  Reduction of a pre-formed radius in aluminium sheet using electromagnetic and conventional forming , 2012 .

[6]  Frédéric Barlat,et al.  Strain rate sensitivity of the commercial aluminum alloy AA5182-O , 2005 .

[7]  Haiping Yu,et al.  Microstructure, texture and mechanical properties of 5A02 aluminum alloy tubes under electromagnetic bulging , 2015 .

[8]  J. Bogdanoff,et al.  On the Theory of Dislocations , 1950 .

[9]  L. Liu,et al.  Deformation behavior and microstructure evolution of pure Cu subjected to electromagnetic bulging , 2014 .

[10]  Lin Liu,et al.  Effect of electropulsing on deformation behavior, texture and microstructure of 5A02 aluminum alloy during uniaxial tension , 2015 .

[11]  S. Morozumi,et al.  The solute atmosphere round a moving dislocation and its dragging stress , 1971 .

[12]  Ning Li,et al.  Deformation texture evolution of pure aluminum sheet under electromagnetic bulging , 2014 .

[13]  D. Wilkinson,et al.  The Portevin-Le Chatelier (PLC) effect and shear band formation in an AA5754 alloy , 2007 .

[14]  Haiping Yu,et al.  Comparative study of the microstructure of 5052 aluminum alloy sheets under quasi-static and high-velocity tension , 2012 .

[15]  J. Hirth,et al.  Theory of Dislocations (2nd ed.) , 1983 .

[16]  Haiyang Zhou,et al.  Formability of Ti–6Al–4V titanium alloy sheet in magnetic pulse bulging , 2013 .

[17]  R. LeSar,et al.  Dislocation motion in the presence of diffusing solutes: a computer simulation study , 2000 .

[18]  S. Hong.  Cyclic stress-strain response and slip mode modification in fatigue of f.c.c. solid solutions , 2001 .

[19]  Rong-Shean Lee,et al.  Determination of the flow curve at high strain rates using electromagnetic punch stretching , 2012 .

[20]  A. Cottrell,et al.  Dislocation Theory of Yielding and Strain Ageing of Iron , 1949 .

[21]  Michael J. Worswick,et al.  Electromagnetic reduction of a pre-formed radius on AA 5754 sheet , 2011 .

[22]  Sun-Ig Hong.  Influence of dynamic strain aging on the dislocation substructure in a uniaxial tension test , 1986 .

[23]  A. Tekkaya,et al.  Electromagnetic forming—A review , 2011 .

[24]  S.T.S. Al-Hassani,et al.  On the Parameters of the Magnetic Forming Process , 1974 .

[25]  Sun Ig Hong,et al.  Mechanisms of slip mode modification in F.C.C. solid solutions , 1990 .

[26]  Blavette,et al.  Three-dimensional atomic-scale imaging of impurity segregation to line defects , 1999, Science.

[27]  David J. Srolovitz,et al.  Solute effects on dislocation glide in metals , 2003 .

[28]  L. Hector,et al.  A predictive mechanism for dynamic strain ageing in aluminium–magnesium alloys , 2006, Nature materials.

[29]  Glenn S. Daehn,et al.  Electromagnetically assisted sheet metal stamping , 2011 .

[30]  M. A. Jaswon,et al.  Distribution of solute atoms round a slow dislocation , 1949, Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences.

[31]  P. G McCormigk,et al.  A model for the Portevin-Le Chatelier effect in substitutional alloys , 1972 .

[32]  A. Tekkaya,et al.  Design and Analysis of a Deep Drawing and In- process Electromagnetic Sheet Metal Forming Process , 2010 .