19:49
Nitride films are ubiquitous in their use as hard, wear-resistant coatings. In this work, we help contribute to a scale-bridging model, helping build understanding of how initial plasma parameters affect the mechanical properties of the final coating system. To this end, we study the effect of transition metal species and oxygen content in transition metal aluminium (oxy)nitride coatings.
Frac...
Posted Sunday, June 28, 2020
49:59
The analysis of deformation and failure mechanisms in small-scale devices and thin films is a critical issue, not yet solved. In this presentation, we describe recent advances and developments for the measurement of fracture toughness at small scales by the use of nanoindentation-based methods, including beam-bending methods and micro-pillar splitting. A critical comparison of the techniques is...
Posted Sunday, June 28, 2020
08:56
Nanoindentation mapping is a potent tool for characterization of the mechanical properties. In this study we present our latest results on nanoindentation mapping of porous 316L stainless steel, fabricated by fused deposition of metals. Our findings suggest that the spectrum of capabilities of nanoindentation mapping could be extended to characterization of local porosity.
Posted Sunday, June 28, 2020
16:43
Technically pure cobalt with a phase transformation temperature of 700 K was investigated by high temperature nanoindentation. From the results of constant indentation strain rate experiments as well as strain rate jump tests the rate controlling deformation mechanisms could be derived. For the low temperature hcp phase from room temperature to 450 K a bcc-like deformation behavior was observed...
Posted Sunday, June 28, 2020
06:29
Hadi Maghsoudi provides an excellent presentation on twinning in magnesium materials using pillar compression and other supporting electron microscopy techniques.
Posted Sunday, June 28, 2020
12:59
Thermoset matrix composites exhibit severe problems related to their environmentally unfriendly disposal and, therefore, there is a growing need to recycle the fibres and potentially reuse them in new products. The most common technique involves the removal of the polymer matrix at high temperature. The aim of the present work is to assess the evolution of mechanical and nanomechanical properti...
Posted Sunday, June 28, 2020
06:36
In recent years, nanoindentation systems have been developed which can operate at ever higher temperatures in order to characterize the local mechanical properties and thermally activated mechanisms of high temperature materials such as nickel-based superalloys at their operating temperature. In this work a new ultra-high temperature nanoindentation system for testing at up to 1100 °C will be p...
Posted Sunday, June 28, 2020
10:06
Hydrogen embrittlement has been of ongoing interest to materials science community and industries over the past several decades. In-situ electrochemical nanoindentation became a versatile tool for probing the impact of electrochemical charging on different materials and technical relevant alloy systems. Besides measuring the classical mechanical properties, such as hardness and Young’s modulus...
Posted Sunday, June 28, 2020
59:52
3D Surface Roughness Characterization using Zeta-20 optical profiler
Surface roughness characterization can be accomplished through multiple surface metrology measurement techniques. This webinar will introduce some techniques for measuring surface roughness, plus typical methods for quantifying the roughness. In addition, we will explore how 3D topography and advanced quantification methods ...
Posted Thursday, June 25, 2020
23:29
Nanoindentation is typically performed at slow strain rates < ~0.1/s, which precludes it from ballistic applications. Recent years have seen the development of nano-impact testing, which produces much higher deformation rates. However, data from such experiments are challenging to interpret, because the high strain rates are not sustained throughout the experiment and the classical definitio...
Posted Wednesday, June 17, 2020
01:02:45
The first and most enduring application of nanoindentation is the characterization of hard coatings designed for mechanical and chemical protection of an underlying material. Diamond-like carbon is a common coating of this kind, with typical coating thickness being less than 100nm. This session is a live demonstration of nanoindentation with the KLA iNano, optimized for very shallow nanoinden...
Posted Wednesday, May 13, 2020
