Proceedings PING 2019: modern trends in material engineering Collection home page

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Collection's Items (Sorted by Submit Date in Descending order): 21 to 40 of 61
Kotous, Jakub , Kubec, Václav , Salvetr, Pavel , Duchek, Michal , Majer, Miroslav
Design and optimization of a closed die forging of nickel-based superalloy turbine blade

The nickel-based superalloys belong to widely used materials for most demanding industrial applications. The design and the experimental verification of manufacturing technology of NIMONIC 80A turbine blade is presented in this paper. A finite element (FEM) simulation was exploited for the c...

Šotová, Petra , Novák, Petr , Medlín, Rostislav
TEM and SEM investigation of AZO thin film microstructure

The aim of this work is describing of structure of sputtered transparent conductive aluminium-doped zinc oxide (AZO) thin films. The main attention was focused on their lateral size and orientation of the grains. The structual properties of the samples were studied by scanning elec...

Opatová, Kateřina , Kučerová, Ludmila , Zetková, Ivana
Methodology for observation of maraging tool steel after 3D printing using FIB and STEM mode

The components of the maraging tool steel produced by 3D printing are further heattreated after printing. It is a stress relief annealing and precipitation hardening since it is martensitic precipitation-hardenable steel. During this process, in the steel microstructure, precipitates of Ni3Ti...

Jandová, Dagmar
Intermetallic phases in 3D printed INCONEL 718

Microstructure of 3D printed INCONEL alloy consists of elongated austenitic grains with high density of precipitates. Three types of intermetallic phases, all with the Ni3X stoichiometry, were identified using transmission electron microscopy and energy dispersive X-ray microanalysis. Fine equiaxed ga...

Vnouček, Milan
Microhardness measurement on heterogeneous joints

The paper deals with measurement of microhardness on heterogeneous welds using automatic hardness tester. The hardness is measured in the welded and heat affected area of the sample. This procedure is confronted with measurement on a homogeneous material with known forming directions.

Tittel, Jan , Kepka, Miloslav , Heller, Petr
Static and dynamic testing of a bogie

The development process of railway bogie frames consists of three stages. The first stage involves stress calculations, the second stage comprises static and fatigue tests and the third one is focused on validating fatigue life data by stress monitoring during test runs on an ...

Procházka, Radek , Konopík, Pavel
Characterization of low cycle fatigue parameters of rotor steel using sub-sized specimens

The paper is dealing with strain controlled cyclic testing method employing a novel strain-control technique based on digital image correlation (DIC) in low-cycle fatigue (LCF) region. The cyclic behaviour of 22CrMoNiWV 8-8 rotor steel was investigated on sub-sized round specimens with a...

Muzika, Lukáš , Švantner, Michal
Flash pulse phase thermography for a paint thickness determination

The contribution describes a fast contactless measurement of a paint thickness nonuniformity using flash pulse thermography. Specimens sprayed by a paint were thermally excited by a flash lamp and temperature responses were recorded by an infrared camera. The recorded sequences were post-pro...

Khalaj, Omid , Siabil, Seyed Mohammad Amin Ghotbi , Tafreshi, Seyed Naser Moghaddas , Kepka, Miloslav , Kavalír, Tomáš , Křížek, Michal , Jeníček, Štěpán
The experimental investigation of behaviour of expanded polystyrene (EPS)

Low-strength substrates and anthropogenic soils are always an issue in civil engineering. Based on the soil layer types, several methods could be used to improve the basic/foundation layer however it would be difficult to make sure if the specified requirements are achieved. Nowada...

Kejzlar, Pavel , Voleský, Lukáš , Pilvousek, Lukáš
The effect of mechanical surface pre-treatment on the strength of the adhesive joint of high strength sheets

Nowadays, in the car body parts production, the quenching is often replaced by adhesive joints. The adhesive joints have a lot of advantages – they allow to keep the protective layer, enable to join different material and prevent from the formation of heat affected zones. ...

Chvostová, Eva , Konopík, Pavel , Horváth, Pavel
Optimization of test specimen dimensions for thermal power station exposure device

Degradation of metallic materials can decrease mechanical properties of metal constructions and components in thermal power plants during their operation and consequently lead to loss of safety and reliability. It is difficult to remove material from the pressure system of the equipment ...

Dymáček, Petr , Dobeš, Ferdinand , Jarý, Milan , Jirásková, Yvonna , Pizúrová, Naděžda , Friák, Martin
Small punch testing of Fe-Al based alloys with Ti and Nb additions

Three Fe-Al-based alloys, a binary with 22 at. % of Al, a ternary with 22 at. % of Al and 7 at. % of Ti and a quaternary with 22 at. % of Al, 4 at. % of Ti and 4 at. % of Nb prepared by arc melting to small button type ingots w...

Andršová, Zuzana , Kejzlar, Pavel , Bakalova, Totka , Petrů, Michal , Podzimek, Petr
The potential of application of Ni-layer for enhancement of utility properties of freight wagons

The construction of 4-axled freight wagons used for transportation of bulk materials is limited with respect of minimal angle allowing emptying the bulk cargo and limited lifetime caused by abrasion caused by intensive wear between the wagon wall and transported cargo. A potential ...

Vrtáček, Jiří , Jirková, Hana , Peković, Michal , Tříska, Ladislav
Rolling of ingots of third-generation high-strength steels into sheets

One of the essential branches of today’s engineering production involves production of sheet stock by rolling. The majority of steel sheet stock is used in the automotive industry. In recent decades, this sector has been striving to reduce vehicle emissions. One of available soluti...

Vlasák, Jakub
Material challenges of steam turbine blades operated in wet steam region - part 2

Water droplet erosion of the steam turbine blades is one of the serious problems affecting lifetime of steam turbines. Last stage blades operated in wet steam region are exposed to erosion degradation which causes serious problems affecting lifetime of steam turbines. It is crucial...

Rubešová, Kateřina , Peković, Michal , Jirková, Hana , Bystrianský, Martin
Effects of deformation on the behaviour of chromium carbides in tool steel studied by use of semi-solid forming

Induction hardening technology is mainly used for processing parts where high hardness, although conventional treatment of tool steels is ordinarily used in industrial practice, engineers continue to seek new procedures to rid tool steels of objectionable primary sharp-edged chromium carbides, wh...

Průcha, Vojtěch , Benešová, Soňa , Veselý, Vilém , Kesl, Miloslav
The influence of hot forging on the size and frequency of carbides in HS 6-5-2

This paper follows on from a paper entitled “Effects of hot forging on the shape and size of prior austenite grain in HS 6-5-2 high-speed steel” which was devoted to a microstructure analysis of slugs from rolled bars of a high-speed steel after two and three forging...

Peukert, Pavel , Švec, Martin
Influence of temperature and speed of the laser head on the final structure surface hardened steel ČSN 12050 (EN 10083-2 steel 1.1191)

Laser technologies are listed as unconventional methods of machining and heat treatment, which allows many advantages. In the area of heat treatment the laser technology allows a wide range of surface hardening. It provides a very fast and effective approach where the region of...

Peković, Michal , Vrtáček, Jiří , Janda, Tomáš , Volkmannová, Julie
Induction hardening of steels with use of the device for incremental forming of round bars HDQT-R 30-12

Induction hardening technology is mainly used for processing parts where high hardness, as well as wear-resistance and ductile core, is required. Normally induction hardening is used for spur gears, wind turbine rings, and bearings. Innovative induction hardening processes are also developed ...

Morawiec, Mateusz , Skowronek, A. , Pakieła, W. , Grajcar, A.
Coiling simulations of medium-Mn sheet steels using dilatometry

The work presents the results of coiling simulations of two medium manganese steels containing 3 and 5% Mn. The steels were subjected to the heat treatment including an austenitization at 1000°C for 300s and next isothermal holding at temperatures of 750, 700, 650 and 500°C&#x...

Collection's Items (Sorted by Submit Date in Descending order): 21 to 40 of 61