Low weight and high strength are significant factors in the current decade's spread of composite sandwich materials. Previous studies have proven that forming stiffening ribs these materials through Single Point Incremental Forming (SPIF) process is possible gives encouraging results. On other hand, knowledge residual stress (RS) values form during manufacturing essential, as they may affect structural integrity manufactured elements, whether compression or tension. The investigation RS...

Laser cladding is a modern surface treatment process used for the regeneration of damaged components and deposition coatings protection against corrosion wear. Precise control enables production claddings on small surfaces (<1 cm2). However, in some cases (e.g., turbine blades), there limited possibility heat dissipation into substrate material, which causes its rapid heating to several hundred degrees Celsius. This work’s objective determine effect temperature laser parameters Stellite 6...

The influence of cooling conditions and surface topography after finish turning Ti6Al4V titanium alloy on corrosion resistance bioactivity was analyzed. samples were machined under dry minimum quantity lubrication (MQL) to obtain different roughness. topographies the processed assessed measured using an optical profilometer. produced subjected electrochemical impedance spectroscopy (EIS) potential tests (Ecorr) in presence simulated body fluid (SBF). basis images from scanning electron...

In this work the effect of crystal structure perfection on creep resistance single superalloys.The CMSX-4 and ® Plus with increased Re content is analyzed.Single rods are made by directional solidification process at withdrawal rates 3 5 mm/min.The evaluation microstructure carried out light microscopy X-ray diffraction Ω-scan methods.Creep tests performed according to ASTM E-139-11 standard temperature 982 °C.Mathematical models for developed both investigated influence superalloys built...

High-entropy alloys are of interest to many researchers due the possibility shaping their functional properties by, among other things, use alloying additives. One approach improving wear resistance AlCoCrFeNi alloy is modification through addition titanium. However, in this study, an alternative solution was explored by adding vanadium, which has a completely different effect on material's structure compared The vanadium additives changes microstructure, hardness, and Al

The effects of ball burnishing on tribological behaviour in dry reciprocating motion have not yet been studied. This work attempts to fill this gap. steel disc samples after milling were burnished. Due burnishing, the average surface height decreased 85% and microhardness increased 20%. Burnishing also generated compressive residual stresses that responsible factor enhance hardness surface. Trbological tests carried out under sliding conditions. A 10 mm diameter ceramic from WC material...

Advanced aircraft gearboxes operate under high mechanical loads. Currently, gears are manufactured from chromium–nickel–molybdenum steel grades such as AISI 9310 or Pyrowear 53. The major causes of gear failure wear and fatigue cracking. As the crack initiation occurs predominantly on component surface, routinely subjected to surface hardening processes low-pressure carburizing case hardening. in a multiple operation process, which teeth grinding is crucial step. Selection improper...

Abstract The article presents an assessment of the crystal perfection single-crystal turbine blades based on orientation and lattice parameter distribution their surface. Crystal analysis was conducted by X-ray diffraction method Ω-scan diffractometer provided EFG Company. successfully used for evaluation parameters in semiconductors. A description example measurement compared to Laue EBSD methods are presented.

This study presents the results of research into influence time plasma nitriding process on microstructure coatings obtained. Cold-work tool steels (60WCrV8, 90MnCrV8, 145Cr6), hot-work steel (X37CrMoV5-1) and high-speed (HS6-5-2) were selected as substrate material. The processes carried out under industrial conditions using an Ionit device from Oerlikon Metaplas with variable times 2, 4 6 hours. According to literature data, a mixture consisting 5% nitrogen 95% hydrogen was chosen, which...

Abstract This study investigates residual stresses in stiffening ribs of composite materials formed by stamping a punch-die system. Using two-dimensional X-ray diffraction (XRD), we measured on both the anterior and posterior sides. Three LITECOR ® types, with core thicknesses 0.8, 1.25, 1.6 mm, were examined. Results indicate that as thickness increases, stress values decrease Notably, side y-axis are relatively higher (1027–1199 MPa) compared to x-axis, exceeding (998–1083 at 0.8 mm...

In this paper the influence of cladding method -laser and TIG -on microstructure properties Stellite 694 coatings deposited onto DS200+Hf nickel based alloy substrate is presented.Manual process were carried out using LORCH V24 DC, laser was Yb:YAG, TruDisk 1000 TRUMPF.Cobalt -Stellite used as a filler material.Effect different methods examined on chemical composition analysis well hardness measurements layers.

Corrosion rates of aluminum in phosphoric (V) acid solutions were determined gravimetrically a presence sodium molybdate which acts as an inhibitor. Inhibition efficiencies calculated. The most effective corrosion inhibition was observed for 0.5 M H 3 PO 4 and 100 mM Na 2 MoO . Since insoluble products precipitated onto specimens influenced the rates, analysis morphology performed by using scanning electron microscope. are composed Mo, P, Al O. An Mo/P atomic ratio varied between 0.8 1.6...

The paper presents results of research into the aluminizing process TiAl intermetallics. substrate was Ti48Al2Cr2Nb intermetallic alloy. BPX Pro 325S CVD system used for process. Used in experimental were four types activators: AlCl 3 , AlF ZrCl 4 and HfCl . During 2 kg Al-Cr granules put a container. deposition carried out argon atmosphere duration hours at temperature 1000°C. XRD chemical analysis conducted. showed than aluminide coatings contained phases formed using an activator. In...

Al 2 Cu phase has been obtained by melting pure metals in the electric arc furnace.It found that intermetallic undergoes selective corrosion H 3 PO 4 aqueous solutions.Aluminium is dissolved, surface becomes porous and enriched with copper.The rate equals to 371 ± 17 g•m -2 •day -1 (aerated solution) 284 9 (deaerated solution).The of after was characterised using electrochemical impedance spectroscopy.It area specimens increases temperature due higher between 2137 3896 cm .

Metal matrix composites (MMCs) are widely used in various industrial applications.Various types of reinforcing particles added to MMCs improve their mechanical and functional properties.Optimal processing conditions for the elements manufactured from ensure effi ciency use.This study describes surface topography parameters iron-based reinforced with graphite, alumina zirconia nanoparticles depending on percentage.The Simplex Lattice Design (SLD) method was as Experiments(DoE) range additives...

Wpływ warunków procesu napawania laserowego na mikrostrukturę i twardość napoiny Stellite 694 podłożu z

Abstract This work presents an attempt to identify local changes in materials caused by grinding burnings using the eddy current (EC) method. The locally heat-treated AISI 9310 steel specimen was prepared a laser surfacing process imitate three different burns. These burn marks were characterized terms of microstructure and hardness on surface cross-section specimen. On such basis, depth heat-affected zone tool examined. Subsequently, subjected EC measurements for quantitative description...

Jakub Jopek, Marek Góral, Barbara Koscielniak, Kamil Ochal, Marcin Drajewicz, Magdalena Mokrzycka, Tadeusz Kubaszek, Dychton, Gancarczyk, Andrzej Gradzik, Pawel Kwasniewski, Wojciech Gluchowski

The research involved the analysis of test results concerning effect laser surfacing process conditions on characteristics an overlay weld made alloy Stellite 694 substrate nickel superalloy Inconel 738LC as well determination and specification most common imperfections.The subjected to tests was using a Yb:YAG disc having power 1 kW filler metal in form powdered cobalt alloy.The led development identification major imperfections including lacks penetration, gas pores microcracks base...