Microstructural and micromechanical characterisation of TiAl alloys using atomic force microscopy and nanoindentation
Gebhard, Susanne and Pyczak, Florian and Göken, Mathias (2009) Microstructural and micromechanical characterisation of TiAl alloys using atomic force microscopy and nanoindentation. Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing (532), pp. 235-241. Elsevier. ISSN 0921-5093.
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Different microstructures were generated in the Ti–45Al–4.6Nb–0.2B–0.2C and Ti–45Al–1Cr alloys (at.%) by heat treatment. The microstructures were investigated using nanoindentation and atomic force microscopy whichwas compared with transmission electron microscopy. Topographic contrast is usually used for phase identification in the atomic force microscope. However, it was found that the topographic order of the phases changes with different microstructures and specimen preparations. Nanoindentation measurements provided local hardness values not obtainable by othermethods and enabled clear distinction of the phases. The hardness values can give information on surrounding microstructure and solid solution hardening. The mean lamellar spacing of the colonies was measured using both atomic force microscopy and transmission electron microscopy. Atomic force microscopy was found to be suitable to determine the spacing between 2/-interfaces offering the advantages of easier sample preparation and fewer specimens compared to evaluation by TEM analysis.
|Title:||Microstructural and micromechanical characterisation of TiAl alloys using atomic force microscopy and nanoindentation|
|Journal or Publication Title:||Materials Science and Engineering A: Structural Materials: Properties, Microstructure and Processing|
|In ISI Web of Science:||Yes|
|Page Range:||pp. 235-241|
|Keywords:||TiAl Micromechanical properties Nanoindentation Atomic force microscopy|
|HGF - Research field:||Aeronautics, Space and Transport|
|HGF - Program:||Aeronautics|
|HGF - Program Themes:||L ER - Engine Research|
|DLR - Research area:||Aeronautics|
|DLR - Program:||L ER - Engine Research|
|DLR - Research theme (Project):||L - Fan and Compressor Technologies|
|Institutes and Institutions:||Institute of Materials Research > Metallic Structures and Hybrid Material Systems|
|Deposited By:||Susanne Gebhard|
|Deposited On:||02 Dec 2009 16:36|
|Last Modified:||26 Mar 2013 13:13|
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