MSE 2016 - Full Program

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Lecture

Microstructure and Texture Evolution in Lamellar Metallic Nano Composites

Thursday (29.09.2016)
16:00 - 16:15
Part of:


Nanocrstalline (nc) materials have become popular in recent times due to their enhanced spectrum of properties such as high strength, high radiation damage strength, etc. Of the various available techniques for synthesis of nc materials severe plastic deformation (SPD) is most attractive due to its capability for producing bulk and impurity free products. However, studies over past few decades have shown that the grain size in monolithic pure metals usually saturates at 50-200 nm, depending on temperature and strain path. One way out of this constraint is to use immiscible bimetallic systems, where the size of individual phases can be reduced to few tens of nanometers and below. Moreover, presence of different phases enhance the thermal stability in these materials.

Recent studies on the deformation induced texture evolution in multiphase structures have shown that dislocation plasticity can be influenced by the hetero interfaces. In this presentation the possibiities of synthesizing copper based immiscible bimetallic composites (Copper-Silver and Copper-Niobium) by high pressure torsion will be discussed. Further, the microstructure and texture evolutions at macroscopic and microscopic scale will be followed as a function of applied strain to understand the role of interfaces on the deformation of these composites.

 

Speaker:
Ph.D. Pradipta Ghosh
Austrian Academy of Sciences
Additional Authors:
  • Karoline Kormout
    Austrian Academy of Science
  • Prof. Dr. Reinhard Pippan
    Austrian Academy of Science

Dateien

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Präsentation Abstract Abstrac for Microstructure and Texture Evolution in Lamellar Metallic nanocomposites 84 KB Download