Microstructure

Description:

Using modern characterization equipment, TAMG’s research in this area focuses on:

  • Microstructure quantification across length scales. Microstructural features including grain size, microcracks, twins, voids, phase volume fractions etc. play a crucial role in overall material performance. Microstructure is therefore a design parameter for modern materials development that is currently being monitored and characterized prior, during and after testing.
  • Microstructure-properties-behavior relationships. Understanding the relationship between specific microstructural variables and important material properties is sought in tailored multiscale experiments and simulations to model and predict material behavior.

microstructure-properties-quantification

Figure: Typical microstructures of materials that are investigated. (a) Example of a polymer matrix reinforced with nanodiamond (left) and polycrystalline Mg AZ31 alloy (right). (b) Important features identified from microstructural investigation including individual broken fibers in fiber-reinforced polymer composites (left), as well as twins (center) and twin activity (right) during deformation of metal alloys.

 Related Publications:

J34. 2018 Wang, F., Hazeli, K., Molodov, K. D., Barrett, C. D., Al-Samman, T., Molodov, D. Agnew, S. R. (2018). Characteristic dislocation substructure in 101¯ 2 twins in hexagonal metals. Scripta Materialia, 143, 81-85.
J33. 2017 B.J. Wisner and A. Kontsos*, “Particle Fracture as a Damage Precursor in Aluminum Alloys”, Fatigue & Fracture of Engineering Material Systems
J25. 2016 C. Mo, B. Wisner, M. Cabal, K. Hazeli, K.T. Ramesh, H. El Kadiri, T. Al-Samman, K.D. Molodov, D. A. Molodov and A. Kontsos*, “Acoustic Emission of Deformation Twinning in Magnesium”, Materials, Vol. 9, 662
J14. 2015 K. Hazeli, J. Cuadra, F. Streller, C. Bahr, M. L. Taheri, R. W. Carpick and A. Kontsos, “Three-dimensional effects of twinning in Magnesium Alloys”, Scripta Materialia, Vol. 100, pp. 9-12 (View)
J9. 2014 K. Hazeli, A. Sadeghi, M.O. Pekguleryuz and A. Kontsos, “Damping and Dynamic Recovery in Magnesium Alloys Containing Strontium”, Materials Science and Engineering A, Vol. 589, pp. 275-279 (View)
J8. 2013 K. Hazeli, A. Sadeghi, M.O.Pekguleryuz and A. Kontsos, “The effect of Strontium in Plasticity of Novel Magnesium Alloys”, Materials Science and Engineering A, Vol. 578, pp. 383-393 (View)
J5. 2013 K. Hazeli, J. Cuadra, P.A. Vanniamparambil and A. Kontsos, “In situ Identification of Twin-related Bands near Yielding in a Magnesium Alloy”, Scripta Materialia, Vol. 68, pp. 83-86 (View)
J1. 2011 Α. Kontsos, T. Loutas, V. Kostopoulos, K. Hazeli, B. Anasori and M. Barsoum. “Nanocrystalline Mg-MAX composites: Mechanical Behavior Characterization via Acoustic Emission Monitoring”, Acta Materialia, Vol. 59, pp.5716-5727 (View)