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:

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.
2017 B.J. Wisner and A. Kontsos*, “Particle Fracture as a Damage Precursor in Aluminum Alloys”, Fatigue & Fracture of Engineering Material Systems
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
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)
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)
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)
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)
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)