Superplasticity in cast A356 induced via friction stir processing

Abstract Superplasticity was investigated in friction stir processed A356 alloy at temperatures of 470–570 °C and initial strain rates of 3 × 10 −4 –1 × 10 −1 s −1 . Maximum superplastic elongation of 650% was obtained at 530 °C and an initial strain rate of 1 × 10 −3 s −1 where a maximum strain rate sensitivity of 0.45 was observed.

[1]  M. Mahoney,et al.  High strain rate superplasticity in friction stir processed Al–Mg–Zr alloy , 2003 .

[2]  D. Apelian,et al.  Effect of solution treatment parameters on tensile properties of cast aluminum alloys , 1990 .

[3]  R. Mishra,et al.  Cavitation in superplastic 7075Al alloys prepared via friction stir processing , 2003 .

[4]  R. Mishra,et al.  High strain rate superplasticity in a commercial 2024 Al alloy via friction stir processing , 2003 .

[5]  Cui Jianzhong,et al.  The influence of the rolling direction on the mechanical behavior and cavity formation during superplastic deformation of 7075 A1 alloy , 1993 .

[6]  P. Prangnell,et al.  Stability of nugget zone grain structures in high strength Al-alloy friction stir welds during solution treatment , 2003 .

[7]  Rajiv S. Mishra,et al.  Superplastic deformation behaviour of friction stir processed 7075Al alloy , 2002 .

[8]  Rajiv S. Mishra,et al.  Friction Stir Processing: A New Grain Refinement Technique to Achieve High Strain Rate Superplasticity in Commercial Alloys , 2001 .

[9]  Christophe Desrayaud,et al.  A Thermomechanical Analysis of the Friction Stir Welding Process , 2002 .

[10]  R. Valiev,et al.  Structure and properties of ultrafine-grained materials produced by severe plastic deformation , 1993 .

[11]  Terence G. Langdon,et al.  The shearing characteristics associated with equal-channel angular pressing , 1998 .

[12]  I. Shigematsu,et al.  Mechanical properties of fine-grained aluminum alloy produced by friction stir process , 2003 .

[13]  M. Mabuchi,et al.  Superplastic deformation mechanism accommodated by the liquid phase in metal matrix composites , 1994 .

[14]  V. Segal.  Materials processing by simple shear , 1995 .

[15]  Yoshinori Nishida,et al.  Microstructure of Al-Si-Mg alloy processed by rotary-die equal channel angular pressing , 2003 .

[16]  Rajiv S. Mishra,et al.  Friction Stir Processing: a Tool to Homogenize Nanocomposite Aluminum Alloys , 2001 .

[17]  R. Mishra,et al.  Friction stir processing: a novel technique for fabrication of surface composite , 2003 .

[18]  W. Lau,et al.  A theoretical model for high-strain-rate superplastic behavior of particulate reinforced metal matrix composites , 1995 .

[19]  A. Mukherjee,et al.  High Strain Rate Superplasticity in a Friction Stir Processed 7075 Al Alloy , 1999 .

[20]  T. Nieh,et al.  A rheological view of high-strain-rate superplasticity in alloys and metal-matrix composites , 1992 .