Publication

Probing the microscopic strength of alumina reinforcements

Andreas Mortensen, Marco Cantoni, Andreas Rossoll
2013
Talks

Abstract

In this work we develop a methodology to probe the strength and toughness of microscopic brittle phases by combining focused ion beam (FIB) milling methods with microtesting techniques and finite element simulation. We present results from tests conducted on alumina fibres and compare data thus obtained with known macroscopic fibre properties derived from tensile tests conducted on long sections of the fibres. The developed methodology is to be transposed towards the microscopic mechanical testing of irregularly shaped second phases in MMCs and alloys.

Official source

https://infoscience.epfl.ch/entities/publication/3dba4e08-3e1d-46ed-9738-e6995144203b

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Andreas Mortensen, Marco Cantoni, Andreas Rossoll
2013
Talks

Abstract

Official source

https://infoscience.epfl.ch/entities/publication/3dba4e08-3e1d-46ed-9738-e6995144203b

About this result

Related concepts (32)

Fracture

Fracture is the separation of an object or material into two or more pieces under the action of stress. The fracture of a solid usually occurs due to the development of certain displacement discontinuity surfaces within the solid. If a displacement develops perpendicular to the surface, it is called a normal tensile crack or simply a crack; if a displacement develops tangentially, it is called a shear crack, slip band or dislocation. Brittle fractures occur without any apparent deformation before fracture.

Fracture toughness

In materials science, fracture toughness is the critical stress intensity factor of a sharp crack where propagation of the crack suddenly becomes rapid and unlimited. A component's thickness affects the constraint conditions at the tip of a crack with thin components having plane stress conditions and thick components having plane strain conditions. Plane strain conditions give the lowest fracture toughness value which is a material property.

Universal testing machine

A universal testing machine (UTM), also known as a universal tester, materials testing machine or materials test frame, is used to test the tensile strength and compressive strength of materials. An earlier name for a tensile testing machine is a tensometer. The "universal" part of the name reflects that it can perform many standard tensile and compression tests on materials, components, and structures (in other words, that it is versatile). Several variations are in use.

Related publications (2)

Probing the microscopic strength of alumina reinforcements

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