Josef Faderl

Voestalpine (Austria)

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Gerald Luckeneder

Voestalpine (Austria)

David Stifter

Johannes Kepler University of Linz

Karl-Heinz Stellnberger

Voestalpine (Austria)

Thomas Steck

Voestalpine (Austria)

Martin Arndt

Voestalpine (Austria)

Jiri Duchoslav

Johannes Kepler University of Linz

Andreas Muhr

Voestalpine (Austria)

W. Siebert

Heidelberg University

Siegfried Kolnberger

Voestalpine (Austria)

Roger Guilard

Université de Bourgogne

Cooperative Institutions

Voestalpine (Austria)

Johannes Kepler University of Linz

Kompetenzzentrum für elektrochemische Oberflächentechnologie

Stahl-Zentrum (Germany)

Deutsches Elektronen-Synchrotron DESY

Mannesmann (Germany)

Christian Doppler Laboratory for Thermoelectricity

Heidelberg University

Max-Planck-Institut für Nachhaltige Materialien

Uppsala University

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(In Situ) Determination of Hydrogen Entry into Galvanized Dual-phase Steel During Corrosive Exposure

BHM Berg- und Hüttenmännische Monatshefte (2023)

Gabriela Schimo‐Aichhorn Ines Traxler Andreas Muhr Gerald Luckeneder Josef Faderl

Abstract The aim of this contribution is to present a comprehensive approach to study the extent of hydrogen entry into a hot-dip-galvanized DP1000 steel, which is exposed to corrosive conditions. For this purpose, the Z100 coating was immersed in 5% sodium chloride solution at room temperature. The distribution of hydrogen and the spots of increased hydrogen entry were detected with scanning Kelvin probe (SKP) and scanning Kelvin probe force microscopy (SKPFM). Effects of hydrogen inserted during corrosion on the mechanical properties were determined in slow-strain rate tests (SSRT). Hydrogen quantification was achieved via thermal desorption mass spectrometry (TDMS), giving additional insights into the mobility of the inserted hydrogen within the steel by distinguishing diffusible and trapped hydrogen.

Thermal desorption

10.1007/s00501-022-01314-3

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Citations (1)

Surface and Coating Analysis of Press‐Hardened Hot‐Dip Galvanized Steel Sheet

steel research international (2012)

Robert Autengruber Gerald Luckeneder Siegfried Kolnberger Josef Faderl Achim Walter Hassel

Abstract The use of continuous galvanized steel sheet as feedstock material for press hardening leads to components of very high strength levels with classical cathodic corrosion protection. The present work provides an insight into this technology with special focus on surface oxidation and intermetallic phase formation during the austenisation process. For that reason hot dipped galvanized 22MnB5 steel sheets, with a blank thickness of 1.5 mm and an average coating weight of 70 g m −2 , were annealed in a temperature range of 400–900°C in steps of 50°C without soaking before quenching in water. Surface and cross‐cuts were analyzed by SEM, EDX, and XRD to illustrate the phase formation and the surface changes during thermal treatment. Corrosion behavior was also studied based on electrochemical investigations and an accelerated, cyclic, automotive corrosion tests called VDA, which is a mixture of salt spray test and alternating climate test. It was found that austenisation of galvanized steel sheet causes a significant change of the coating. The generated coating still offers cathodic protection for the steel substrate and has higher corrosion resistance than standard galvanized steel sheet. Surface oxidation also occurs during the press hardening process leading to a surface covered with successively arranged layers of Al 2 O 3 and ZnO, containing also further oxidized alloying elements.

Galvannealed

10.1002/srin.201200068

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Citations (33)

CCDC 102879: Experimental Crystal Structure Determination

The Cambridge Structural Database (1999)

Josef Faderl B. Deobald Roger Guilard Hans Pritzkow W. Siebert

An entry from the Cambridge Structural Database, the world’s repository for small molecule crystal structures. The entry contains experimental data from a crystal diffraction study. The deposited dataset for this entry is freely available from the CCDC and typically includes 3D coordinates, cell parameters, space group, experimental conditions and quality measures.

10.5517/cc3g1p8

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Warmumformung verzinkter Stähle

Lightweight Design (2016)

Karl M. Radlmayr Reiner Kelsch Christian Rouet Thomas Kurz Gerald Luckeneder

10.1007/s35725-016-0036-6

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XPS,AESおよびLEIS,UHV条件下でのスパッタ深さプロファイリングのための問題により研究した金属表面上の酸素蓄積【Powered by NICT】

Applied Surface Science (2017)

R. Steinberger C. Celedón Barbara Bruckner D. Roth Jiri Duchoslav

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Hydrogen embrittlement of DP-1000 flat steel sheet: Influence of mechanical properties, specimen geometry, pre-damaging and electrolytically zinc galvanizing

Materials and Corrosion (2015)

R. Scharf Andreas Muhr Gerald Luckeneder P. Larour Klemens Mraczek

Studies towards the impact of solute hydrogen on the mechanical properties of ultra-high strength sheet steel grades (UHSS) for the automotive industry have been increasingly conducted in the past years. This paper focuses on the pre-damaging of a dualphase DP-1000 automotive sheet steel, as found in the manufacturing of automotive body parts, in connection with hydrogen embrittlement. It is shown that the kind of pre-damaging of the specimens has a severe influence on the occurrence of hydrogen embrittlement. Hydrogen embrittlement resistance under corrosive conditions was determined through constant load tests. Tensile specimens, manufactured from electrolytically zinc galvanized DP-1000 steel, were immersed in a 5% sodium chloride solution. The impact of material properties, pre-damaging and specimen geometry are critically discussed. Furthermore a discussion is given about the material testing methods most suitable to indicate high or low hydrogen embrittlement resistance if constant load testing is performed.

Embrittlement

10.1002/maco.201508434

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Citations (17)

Properties and potential applications of novel ZnMg alloy coatings on steel sheet

Revue de Métallurgie (2004)

T. Koll K. J. Ullrich Josef Faderl J. Hagler Bernd Schuhmacher

By depositing PVD coatings on already conventionally galvanized steel sheets novel zinc alloy coatings have been developed. One of the biggest advantages of PVD coatings lies in the broad choice of coating materials as there are no constraints due to chemical reactions between the substrate and the coating. This leads to a variety in the coating compositions. Accordingly, PVD processes enable customized solutions for various purposes. Magnesium on galvanized sheet steel has been identified as a very promising coating system. Corrosion performance is improved considerably while other properties like forming, joining and painting are comparable to or better than the untreated galvanized material.

Conversion coating

Galvannealed

10.1051/metal:2004117

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Citations (13)

Critical Assessment of the Effect of Atmospheric Corrosion Induced Hydrogen on Mechanical Properties of Advanced High Strength Steel

Metals (2020)

Darya Rudomilova Tomáš Prošek Ines Traxler Josef Faderl Gerald Luckeneder

Hydrogen absorption into steel during atmospheric corrosion has been of a strong concern during last decades. It is technically important to investigate if hydrogen absorbed under atmospheric exposure conditions can significantly affect mechanical properties of steels. The present work studies changes of mechanical properties of dual phase (DP) advanced high strength steel specimens with sodium chloride deposits during corrosion in humid air using Slow Strain Rate Test (SSRT). Additional annealed specimens were used as reference in order to separate the possible effect of absorbed hydrogen from that of corrosion deterioration. Hydrogen entry was monitored in parallel experiments using hydrogen electric resistance sensor (HERS) and thermal desorption mass spectrometry (TDMS). SSRT results showed a drop in elongation and tensile strength by 42% and 6%, respectively, in 27 days of atmospheric exposure. However, this decrease cannot be attributed to the effect of absorbed hydrogen despite the increase in hydrogen content with time of exposure. Cross-cut analysis revealed considerable pitting, which was suggested to be the main reason for the degradation of mechanical properties.

Elongation

Pitting Corrosion

10.3390/met11010044

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Citations (8)

CCDC 177342: Experimental Crystal Structure Determination

The Cambridge Structural Database (2003)

Thomas Köhler Josef Faderl Hans Pritzkow W. Siebert

Crystal (programming language)

10.5517/cc5yjqb

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