TriDes – a new tool for the design, development and non-destructive evaluation of advanced construction steels

Abstract

Design and development of advanced steel types require establishing an optimal combination of mechanical strength, resistance to hydrogen degradation and durability, among others; however, the available tools for assessing some of these properties are limited. A novel tool for supporting the design and development of steel types was therefore created. This tool, called TriDes, is based on the phenomenon of mechanically stimulated gas emission and allows for determining mechanical properties and hydrogen concentration locally, with high spatial resolution and during different phases of the service life of construction steel elements. Its applicability to the development of pipe steel with improved durability, as well as to steel types used in marine environments, has been investigated. RESUMEN: TriDes -una nueva herramienta para el diseño, desarrollo y evaluación no destructiva de aceros avanzados de construcción.El diseño y desarrollo de acero avanzado requiere establecer una combinación óptima de resistencia mecánica, resistencia a la degradación por hidrógeno y la durabilidad, entre otras. Sin embargo, las herramientas disponibles para evaluar experimentalmente algunas de estas propiedades son limitadas. Por lo tanto se creó una nueva herramienta, llamada TriDes. Esta técnica está basada en un principio físico distinto de los que se usan en las técnicas establecidas y combina la caracterización de hidrógeno en el acero en y la caracterización mecánica y/o tribológica. La técnica es portatil lo que permite determinar concentración local de hidrógeno con alta resolución espacial durante todo el ciclo de vida de elementos fabricados en acero y además evaluar la dureza y resistencia al desgaste del acero. Se ha investigado la capacidad de la técnica para el desarrollo de aceros para aplicaciones en gasoductos y construcciones marinas.

Cyclic Indentation Method Applied to Evaluating Surface Degradation of Cylinder-Piston Group Parts

“…, where P dyn =10 N is the variable component of the load with a frequency of 25 Hz, which were applied simultaneously with a static normal load P st . In all cases, the surface degradation of samples (linear wear) of the friction tracks was evaluated by analyzing the profile and topography of friction tracks with 2D profilometer K-201 [11] and 3D Measuring Laser Microscope LEXT OLS4000. The microhardness of the specimens was determined using a PMT-3 instrument equipped with a Vickers indenter at 0.5 N load.…”

“…Degradation of these specimens' surfaces was carried out according to the short-term test procedure, which is schematically shown in Fig. 2 [9][10][11]. The tests of flat and cylinder samples for wear were conducted on the automatized tribological complex (ATC) under quasi-static and cyclic conditions in the 4652D lubricating oil (15W-40).…”

Time-Resolved Characterization of Dynamic Tribochemical Processes for Dicationic Imidazolium Ionic Liquid

“…A new family of experimental techniques that combine tribometry with mass spectrometry or surface sensitive techniques has recently emerged [48][49][50][51][52][53][54]. These new techniques can provide important information on the development of tribochemical processes in the course of a tribological test.…”

Technology to Increase Hydrocarbon Wear Resistance of Friction Units of Hydrogen Aggregates

“…This film was a reliable protection against the surface wear exposed to hydrogen. Another method is given in [5]. A new instrument, called TriDes, was created, based on the phenomenon of mechanically stimulated gas emission, which allows determining the mechanical properties and hydrogen concentration, with a high spatial resolution.…”