Materials Science and Engineering Commons^™

Obtaining Mechanical Properties Of Superelastic Materials From Microindentation Data, Dmitry Zhuk, Margarita Isaenkova, Olga Krymskaya, Yuriy Perlovich

Nanomechanical Testing in Materials Research and Development V

Indentation is one of the most widely used techniques for determination of mechanical properties of materials. Many various methods for extraction of mechanical properties had been introduced for elasto-plastic materials. Later, the use of microindentation were extended to composite, porous, anisotropic and multi-phase materials. Use of microindentation for determination of such materials properties is impeded due to its complex behavior and larger number of material properties’ constants.

This work is focused on indentation of superelastic materials with austenite - martensite phase transformation and extraction of material properties. Finite element (FE) modeling was used to model indentation of superelastic alloys with …

High Temperature Nanoindentation Testing Of Amorphous Silicon Carbonitride Thin Films, Radim Ctvrtlik, Marwan Al-Haik, Valeriy Kilikovsky

Nanomechanical Testing in Materials Research and Development V

The mechanical properties of amorphous silicon carbonitride (SiC_xN_y) films with various nitrogen content (y = 0-40 at.%) were investigated in-situ at elevated temperatures up to 650 °C in inert atmosphere. The hardness and elastic modulus were evaluated using depth sensing nanoindentation with cubic boron nitride Berkovich indenter. Both the sample and indenter were separately heated during the experiments to temperatures 300, 500 and 650 °C. Short duration high temperature creep (1200 s) of the films was also investigated. The results revealed that the room temperature hardness and elastic modulus decline with the increase of the nitrogen …

The Measurement Of The Adhesion Force Between Ceramic Particles And Metal Matrix In Ceramic Reinforced-Metal Matrix Composites, Dariusz Jarzabek, Marcin Chmielewski, Tomasz Wojciechowski

Nanomechanical Testing in Materials Research and Development V

This paper presents the method for measurement of the adhesion force and fracture strength of the interface between ceramic particles and metal matrix in ceramic reinforced-metal matrix composites. Three samples with the following Cu to Al₂O₃ ratio (in vol.%) were prepared: 98.0Cu/2.0Al₂O₃, 95.0Cu/5.0Al₂O₃ and 90Cu/10Al₂O₃. Furthermore, microwires which contain a few ceramic particles were produced by means of electro etching. The microwires with clearly exposed interface were tested with use of the microtensile tester (Fig. 1). The microtensile tester consists of two stages, to which two …