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Characterization of anisotropic behaviour of ZK60 extrusion under stress-control condition and notes on fatigue modeling

Pahlevanpour, A. H ; Sharif University of Technology | 2019

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  1. Type of Document: Article
  2. DOI: 10.1016/j.ijfatigue.2019.05.030
  3. Publisher: Elsevier Ltd , 2019
  4. Abstract:
  5. The anisotropic fatigue behavior of ZK60 is investigated through stress-control tests along two different material directions: extrusion (ED) and radial (RD) directions. The in-plane random texture along RD promotes activation of twinning/detwinning deformations in both tension and compression reversals, which brings about a sigmoidal but near-symmetric shape for hysteresis loops. The stress-strain response along ED is asymmetric, which is attributed to different deformation mechanisms in tension and compression reversals. The higher fatigue strength along ED is related to lower plastic strain energy in this direction. An energy damage parameter showed a good correlation with tests performed in RD and ED. © 2019 Elsevier Ltd
  6. Keywords:
  7. Anisotropy ; Characterization ; Fatigue modeling ; Stress-control ; Wrought magnesium ; Deformation ; Extrusion ; Strain energy ; Tensile strength ; Textures ; Anisotropic behaviours ; Deformation mechanism ; Fatigue model ; Good correlations ; Stress control ; Stress-strain response ; Tension and compression ; Wrought magnesiums ; Fatigue of materials
  8. Source: International Journal of Fatigue ; Volume 127 , 2019 , Pages 101-109 ; 01421123 (ISSN)
  9. URL: https://www.sciencedirect.com/science/article/abs/pii/S014211231930204X#!