Article

Journal of Materials Engineering and Performance

, Volume 17, Issue 5, pp 755-766

First online:

Microstructure Analysis of Aluminum Alloy and Copper Alloy Circular Shells After Multiaxial Plastic Buckling

  • N. DrusinaAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , R. MahapatraAffiliated withNaval Air Systems Command, Naval Air Warfare Center
  • , A. Abdul-LatifAffiliated withLaboratoire de Mécanique, Matériaux et Modélisation (L3M), Universite Paris 8, IUT de Trembaly
  • , R. BalehAffiliated withLaboratoire de Mécanique, Matériaux et Modélisation (L3M), Universite Paris 8, IUT de Trembaly
  • , C. WilhelmAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , P. StoyanovAffiliated withMechanical Engineering Department, Loyola Marymount University
  • , O.S. Es-SaidAffiliated withMechanical Engineering Department, Loyola Marymount University Email author 

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Aluminum and copper cylindrical shells were plastically buckled under quasi-static and dynamic loading conditions with an Absorption Compression-Torsion Plasticity (ACTP: Patent No. WO 2005090822) combined mechanical testing device. Optical microscopy and transmission electron microscopy (TEM) analysis were used to study the microscopic evolutions in the mechanically buckled aluminum and copper alloy samples. Optical microscopy showed evidence of the presence of second-phase particles in both the aluminum and copper alloys samples. Under dynamic loading aluminum samples showed more energy absorption as compared to copper samples. Material flow lines were more pronounced in the copper samples when observed by optical microscopy. The evidence that supports the increased energy absorption in the aluminum cylindrical shells can be supported by the TEM analysis more than the optical microscopy analysis. The TEM results showed highly oriented textured morphology with the presence of few dislocation cells structures and sub-structures.

Keywords

ACTP aluminum and copper alloys cylindrical shells quasi-static and dynamic plastic buckling