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Mechanical behavior and texture development of over-aged and solution treated Al-Cu-Mg alloy during multi-directional forging

Khani Moghanaki, S ; Sharif University of Technology | 2018

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  1. Type of Document: Article
  2. DOI: 10.1016/j.matchar.2017.11.048
  3. Publisher: Elsevier Inc , 2018
  4. Abstract:
  5. The effects of initial heat treatments, i.e. solution treating and over ageing, on deformation behavior of an age hardenable Al-Cu-Mg alloy, including mechanical properties and texture evolution, during multi-directional forging (MDF) are investigated. Hardness measurements, electron back scatter diffraction (EBSD) maps, and differential scanning calorimetry (DSC) are carried out. Mechanical behaviors of the alloy in terms of compressive stress and hardness test after MDF are investigated. In both solution treated and over-aged alloys, the compressive stress during MDF shows an increase up to the second pass, and by further straining the flow stress is decreased. However, shear and deformation bands are formed in both solution treated and over-aged alloys, the density of these instabilities in the solution treated alloy is higher than that in over-aged alloy. In the solution treated alloy, not only large particles induce deformation bands, but also the dynamically formed GPB zones/Cu-Mg co-clusters. Texture analysis shows that the shear component of C {001}〈110〉 (Φ1 = 90°, Φ = 0°, Φ2 = 45°) is developed with 18 mrd during MDF of the over-aged alloy. In the solution treated alloy, due to the high density of deformation bands and different microchemistry of the matrix in comparison with that of the over-aged alloy, the Copper type texture component {112}〈111〉 (Φ1 = 90°, Φ = 35°, Φ2 = 45°) is developed with 11 mrd. © 2017 Elsevier Inc
  6. Keywords:
  7. Al-Cu-Mg alloy ; Mechanical properties ; Multi-directional forging ; Over-age ; Solution treatment ; Texture ; Aluminum ; Aluminum alloys ; Compressive stress ; Deformation ; Differential scanning calorimetry ; Forging ; Grain size and shape ; Hardness ; Heat treatment ; Magnesium alloys ; Stresses ; Ternary alloys ; Textures ; Al-Cu-Mg alloys ; Deformation behavior ; Electron back scatter diffraction ; Hardness measurement ; Multidirectional forging ; Solution treatments ; Solution-treated alloys ; Copper alloys
  8. Source: Materials Characterization ; Volume 135 , 2018 , Pages 221-227 ; 10445803 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/pii/S1044580317329765