Crack nucleation and elastic / plastic deformation of TiAl alloys investigated by in-situ loaded atomic force microscopy

Journal article


Publication Details

Author(s): Iqbal F, Pyczak F, Neumeier S, Göken M
Journal: Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing
Publisher: ELSEVIER SCIENCE SA
Publication year: 2017
Volume: 689
Pages range: 11-16
ISSN: 0921-5093


Abstract

The crack propagation mechanisms of gamma-titanium aluminides with fully lamellar microstructure have been studied using in-situ deformation in the Atomic Force Microscope (AFM). AFM demonstrated the unique capability to detect elastic as well as plastic deformation during in-situ tests from topography changes on the surface. It was found that the crack nucleation, which can occur at gamma/gamma and alpha 2/y interfaces as well as inside the gamma-phase, is always preceded by strong local elastic deformation. No cracking inside the alpha 2-phase was observed. The elastic and plastic deformation was confined inside the gamma-phase and especially pronounced near interfaces which can be explained by the differences of the elastic and plastic deformation behavior of the gamma-and alpha 2-phase.


FAU Authors / FAU Editors

Göken, Mathias Prof. Dr.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Iqbal, Farasat
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)
Neumeier, Steffen Dr.-Ing.
Lehrstuhl für Werkstoffwissenschaften (Allgemeine Werkstoffeigenschaften)


How to cite

APA:
Iqbal, F., Pyczak, F., Neumeier, S., & Göken, M. (2017). Crack nucleation and elastic / plastic deformation of TiAl alloys investigated by in-situ loaded atomic force microscopy. Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing, 689, 11-16. https://dx.doi.org/10.1016/j.msea.2017.02.017

MLA:
Iqbal, Farasat, et al. "Crack nucleation and elastic / plastic deformation of TiAl alloys investigated by in-situ loaded atomic force microscopy." Materials Science and Engineering A-Structural Materials Properties Microstructure and Processing 689 (2017): 11-16.

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Last updated on 2019-12-02 at 00:08