Titanium alloys are widely used in aerospace and automotive industries. They to implement some parts of machines, also the chemical industry, power arms shipbuilding, implantology biomedical engineering. Extent use this material is mainly due high corrosion resistance, especially aggressive environments. These materials with a low ratio weight relation mechanical properties. That is, while maintaining desired properties structures made titanium lighter than standard stainless...

The paper presents a short crack theory together with the finite element method (FEM), which is used to model initiation during operational phase of pipeline. To simulate crack, virtual extension (VCE) method, implemented in FE code, used. This describes modelling and simulation welded pipeline initiated beginning. A FEM procedure for analysing stress intensity factors (SIF's) J-integral two practical problems presented. For first problem commercial software ANSYS was calculate parameters...

The presented article describes the unconventional technology - bending and forming by laser. This is alters tension in material, which subsequently change shape of formed parts. Article also four mechanisms deformation after impact laser beam on material: first mechanism temperature gradient, second buckling mechanism, third pressing (Borten) fourth phase transition. experimental part focuses metallographic evaluation samples from three different areas micro forming. detail technological...

Abstract This paper discusses some of the basic problems involved in laser welding dissimilar materials with significant differences melting points. It focuses on micro and macrostructure welded NiCr-Ir microjoints used central spark plug electrodes. The joints were produced by without preheat using an Nd,YAG laser. structure composition analyzed means a light microscope (LM) scanning electron (SEM) equipped energy dispersive X-ray (EDX) spectrometer. microhardness weld area was also studied.

The translation in this article analyses the technology of laser cutting, describes properties cutting equipment oxidation process melting and sublimation cutting. In chemical composition cutted material interaction with quality edges from cut-outs is analysed. measurement was performed on experimental samples made steel grade S355 however elements each sample varied. On these examined for purpose to find out influence purity components which were cut by using technology.

One of the most commonly applied methods joining dissimilar materials is gluing. This could be mainly attributed to applicability this technique in various industries. The article presents a method material surface treatment, which increases shear strength adhesive joints for lightweight metals such as aluminum with plastics. For purpose, laser microstructuring was performed on each selected construction materials. As result active glued area increased, increased strength. picosecond UV...

The article deals with contactless thermal forming of metals. In the introduction bending theory components by using flame technology is described. On basics information obtained from analysis previous research a technological procedure was developed. This uses gained characteristics material behavior in process heterogeneous circumferential heating. principal concentrating local heating area which placed quasi prism leads to moment. moment evokes deformation compacted this way. Application...

Article deals with ultrasonic testing of the casting. It focuses on problems that arise when castings is made non-ferrous metals. Theoretical introduction article dedicated to most common types casting defects and selecting technology for their reliable identification. The impact large anisotropic grain propagate attenuation ultrasound it describes in theory. examples practical Cu-alloy are presented experimental part. Modern tools simulation propagation material were used correct setting...

This study discusses the impact of heat treatment conditions on final properties quenched and low-tempered bearing components in terms microstructure, hardness strength. Technological process must be done rationally addition to required also ensure dimensional precision bearings components. Different austenitization have a great influence phenomena which takes place material during austenitizing. Heat rolling is an indispensable part their production it unavoidable item price calculation...

Simulations of the welding process for applications practice using SYSWELD are presented. This paper presents simulation in repair high-pressure gas pipeline with steel sleeve composite filling. Material experimental sample was S355. The simulations divided to two parts: thermal followed by mechanical simulation. results numerical model, which listed article compared real experiments.

This article is focused on the processing of steel materials by thermal cutting technologies - laser cutting. It analyzes impact technological parameters speed effect surface quality. The goal to define ensuring proper amount heat absorbed into material that does not affect avoid difficultiesduring further such as drilling, thread etc.To determinethe quality surface, it was necessary measure an internal stress and a hardness HVM. Internal stresses in experimental part measured X-ray...

Abstract This article deals with the technology and principles of laser cutting ductile cast iron. The properties CO 2 beam, input parameters cutting, assist gases, interaction cut material stability process are described. commonly used (nodular iron - share about 25% all castings on market) method that material, including technological influence edge, characterized. Next, application use this in mechanical engineering practice is described, focusing fixing renovation components such as...

The presented scientific article deals with cutting edges after by laser beam. describes the characteristics of beam factors entering into process CO2 laser, and their interaction on integrity edge selected technical materials - steel S23JR. includes experimental evaluation input parameters samples thickness t= 2 mm which were cut applying different for accurate assessment impact each technological parameters. part this changes speed influence HAZ width hardness edges. outcomes may be...

The theoretical part of the paper presents some basics laser cutting technology and principles.The characteristics CO2 beam parameters entering process are described.The conventionally used material -S235JR steel, method its effect technological on cut area presented as well.Experimental investigations were performed samples made S235JR with application different parameters, while observing surface roughness Rz Ra.Roughness results displayed images scanned geometry graphically for each...

In this paper, the authors discuss method of deformations compensation (resulting from impact variable temperatures and pressure) in pipelines intended for fluids transport (liquids gases). Classical methods through so-called "natural compensation" using special devices called expansion joints. paper present research work on a new type metal joints, bellow-lens The mechanically assisted laser forming method, which was used to manufacture presented. uses CO2 radiation heat element joint will...

Lasers are widely used in industry as cutting tools due to ultra flexibility of the conditions, obtaining high quality end product, quick set up, non-mechanical contact between workpiece and tool, small size heat affected zone. In present study, laser gas assisted process is examined. The sheet solution practically always very convenient compared conventional technologies brings greatest cost savings manufacturing process.

Paper presents results of microstructure and mechanical tests welded joints new generation Super304 austenitic stainless steel using high power CO₂laser (LBW method) with bifocal welding head. is modified 304 dedicated to energetic installation material, designed replace currently used. High content chromium nickel others alloying elements improve its resistance strength characteristic. Use for production the superheaters, heating chambers walls in steam boilers resulted various...

The setting of laser cutting technology parameters affects the resulting state final surface. When low-carbon steel using conventional - oxidative cutting, surface oxide layers are formed on edges from an exothermic reaction by burning material. undesirable and can cause complications if components so produced further coated. color coat creates adhesion layer oxide, when has low to base material, paint drops out with oxide. Mechanical removal grinding, punching or brushing is another...

The article is focused on the construction problems of cutting tools designed for manufacturing components in high numbers. Analysis tool with low lifetime provided use simulation software to detect causes failure. Parameters are close real conditions production. results from indicate that bending moment occurs because forces which have opposite direction different areas. On these basis technological adjustments made. These also analysed by using software.

Paper presents results of laser welding dissimilar joints.Flange pipe joints austenitic TP347-HFG and low carbon S235JR steels were performed.Possibility girth was presented.Welding materials are complex phenomena, chemical composition chromium nickel base steel with amount 0.07%, comparing to trace chromium, 0.17% different, affect on result.Amount have great effect phase transformation crystallization process, which material hardenability strength characteristic.In conventional GMA methods...