Acta Metallurgica Sinica (English Letters)

, Volume 27, Issue 2, pp 359–367 | Cite as

Improved Fracture Toughness of Cryorolled and Room Temperature Rolled 6082 Al Alloys

  • Vineet Kumar
  • I. V. Singh
  • B. K. Mishra
  • R. Jayaganthan
Article

Abstract

In the present work, 6082 Al alloy has been rolled to 40% and 70% thickness reductions at the cryogenic and room temperatures for the improvement in mechanical and fracture toughness properties. All cryorolled samples are subjected to aging at different temperatures, i.e., 140, 160, and 190 °C to improve the strength, ductility, and fracture toughness. The microstructures of the cryorolled (CR) and room temperature rolled (RTR) alloy after 40% and 70% thickness reductions are characterized by FE-SEM to reveal the modes of failure. The results show that the starting bulk Al alloy specimen is fractured in total ductile manner, consisting of well-developed dimples over the entire surface. The mechanical properties and fracture toughness of the 70% CR alloy are found better than 70% RTR alloy due to higher dislocations density and formation of sub-grain structures in the CR alloy.

Keywords

6082 Al alloy Rolling Mechanical properties Fracture toughness J-Integral Material characterization 

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Copyright information

© The Chinese Society for Metals and Springer-Verlag Berlin Heidelberg 2014

Authors and Affiliations

  • Vineet Kumar
    • 1
  • I. V. Singh
    • 1
  • B. K. Mishra
    • 1
  • R. Jayaganthan
    • 2
  1. 1.Department of Mechanical and Industrial EngineeringIndian Institute of TechnologyRoorkeeIndia
  2. 2.Department of Metallurgical and Materials EngineeringIndian Institute of TechnologyRoorkeeIndia

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