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  • 1
    Electronic Resource
    Electronic Resource
    On the influence of silicon on the growth of the alloy layer during hot dip aluminizing (1986)
    Springer
    Journal of materials science 21 (1986), S. 3348-3350 
    Details
    ISSN: 1573-4803
    Source: Springer Online Journal Archives 1860-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Notes: Abstract The reactions between a low alloyed steel and a pure as well as a 2% silicon containing aluminium melt where studied at 780 and 792
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00553379
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  • 2
    Electronic Resource
    Electronic Resource
    Pulveraluminieren von niedriglegiertem Stahl: Metallkundliche Gesichtspunkte zum Beschichtungsverfahren und zur Beständigkeit der Schutzschicht im HochtemperatureinsatzHerrn Prof. Dr. H. Kaesche zum 60. Geburtstag gewidmet (1989)
    Weinheim [u.a.] : Wiley-Blackwell
    Materials and Corrosion/Werkstoffe und Korrosion 40 (1989), S. 29-33 
    Details
    ISSN: 0947-5117
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Pack aluminizing of low alloyed steel: Metallurgical aspects of the coating procedure and coating reliability in high temperature serviceThis study concentrates on metallurgical aspects of the pack aluminizing coating procedure of a low alloyed 1% Cr½% Mo steel (13 CrMo 44) as well as on the coating reliability in high temperature service.It is reported, how the coating procedure can be optimized by controlling coating temperature and time as well as the composition of the powder mixture.In high temperature service a protective coating has to withstand diffusion and corrosion reactions. Creep and low cycle fatigue of a component also can result in coating failure.Optimized coatings on low alloyed steels withstand high temperature sulfidation up to 600°C, where no increase in layer thickness or decrease of aluminium concentration in the specimen surface occurs. Even after creep strains of six percent no cracks are found in the coating.Thermal cycling of coated specimens results in nucleation and growth of cracks in the coating and thus represents the life limiting damage process of aluminized low alloyed steel.
    Notes: In einer Fallstudie am Beispielk des niedriglegierten Stahles 13 CrMo 44 wird in der vorliegenden Arbeit aufgezeigt, wie Schutzschichten auf Hochtemperaturwerkstoffen zunächst durch gezielte Einstellung der Beschichtungsparameter Pulvermischung, Beschichtungstemperatur und Beschichturgsdauer optimiert werden, wobei der metallographischen Analyse der Schutzschichten eine besondere Bedeutung zukommt (Abb. 11a).Die Schutzschicht muß im Hochtemperatureinsatz einem Beanspruchungskollektiv aus Diffusions- und Korrosionsreaktionen mit überlagerten mechanischen Beanspruchungen, wie Kriechen und thermische Ermüdung, standhalten (Abb. 11b). In der vorliegenden Untersuchung wurde das Beanspruchungskollektiv in seine Einzelkomponenten zerlegt. Es zeigte sich, daß Abdiffusion, Hochtemperatursulfidierung und Kriechen von einer optimierten Alitierschicht gut ertragen werden.Temperaturwechselbeanspruchungen führen zu Ermüdungsrißbildung in Pulveraluminierschutzschichten und stellen daher einen sehr wichtigen, die Lebensdauer bestimmenden Bestandteil des Beanspruchungskollektivs im Hochtemperatureinsatz dar.
    Additional Material: 11 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/maco.19890400105
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  • 3
    Electronic Resource
    Electronic Resource
    Development of a new creep specimen for medium and high temperature tests (1998)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 29 (1998), S. 137-140 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Entwicklung einer neuen Kriechprobe für Tests bei mittleren und hohen TemperaturenEine neue Kriechprobengeometrie wird vorgestellt, die keine Gewindeköpfe sondern Rundköpfe zur Einspannung verwendet. Dies bietet den Vorteil, daß Hochtemperaturhaftungsprobleme deutlich verringert werden. Darüber hinaus erleichtert diese Geometrie die Herstellung von Proben aus Werkstoffen, die sich nur schwer mechanisch bearbeiten lassen oder teuere Bearbeitungsverfahren erforderlich machen. An Hand von zwei Beispielen wird der erfolgreiche Einsatz dieser Probe demonstriert.
    Notes: A new creep sample geometry is presented which has round heads instead of threads to connect to the grips. This reduces high temperature adhesion problems considerably. In addition, the production of samples from materials which are difficult to machine or which requires expensive machining techniques is made easier using this geometry. The successful use of the sample is demonstrated by means of two examples.
    Additional Material: 6 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19980290306
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  • 4
    Electronic Resource
    Electronic Resource
    On the effect of Temperature Cycling on the coating of a pack aluminized low alloyed steel (13 CrMo 44) (1987)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 18 (1987), S. 235-239 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Zum Einfluß von Temperaturwechseln auf Pulveraluminierschutzschichten auf niedriglegiertem Stahl (13 CrMo 44)Duch Pulveraluminieren von niedriglegiertem Stahl kann gute Beständigkeit gegen Hochtemperaturkorrosion bis zu 700 °C erreicht werden, ohne daß Diffusionsprozesse schon zu einer Verarmung von Aluminium in der Probenoberfläche führen. Im normalen Hochtemperatureinsatz ist die Schutzschicht auch Temperaturwechseln unterworfen. In dieser Untersuchung wird berichtet, wie Pulveraluminierschutzschichten auf Temperaturwechsel zwischen 700 °C and Raumtemperatur bzw. Temperatur ds flüssigen Stickstoffs reagieren. Neben Rißbildung und -wachstum wird die Abhängigkeit der Mikrorißdichte von Zyklenzahl, Abkühlgeschwindigkeit und Probengeometrie beschrieben.
    Notes: Coated pack aluminized low alloyed steels are known for their good resistance against high temperature corrosion up to 700 °C, where diffusion stability is still sufficient. In typical high temperature applications, coating and substrate are subjected to thermal fatigue. In this study the metallurgical stability of a coated, pack aluminized, low alloyed steel is reported. The specimens were cyclically quenched from 700 °C to room temperature or liquid nitrogen temperature respectively, to assess the importance of thermal shock severity on the kinetic of degradation. In particular, crack initiation and growth were studied. The dependence of microcrack densities upon numbers of cycles, cooling rates and specimen geometry is reported.
    Additional Material: 10 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19870180711
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  • 5
    Electronic Resource
    Electronic Resource
    Finite Element Stress and strain analysis of a double shear creep specimen (1997)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 28 (1997), S. 457-464 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Es wird über Finite-Elemente-Berechnungen (FEM) von Spannungen und Dehnungen in einer erst vor kurzem vorgeschlagenen Doppelscherkriechprobe [1] berichtet. Betrachtet werden Spannungsumverteilungen während des Kriechens, kleine Änderungen der Probengeometrie während des Versuchs und hohe lokale Spannungen als Folge der Lasteinleitung in die Scherprobe. Die Ergebnisse zeigen, daß der in [1] vorgeschlagene Doppelscherversuch mindestens bis zu Scherungen von 0.10 brauchbare Scherkriechdaten liefert. ([1]: C. Mayr et al., Materials Science and Engineering, A 199 (1995) p. 121)
    Notes: This paper reports on creep stress and strain results obtained by the finite element method (FEM) for a double shear specimen which was recently developed [1]. It considers stress redistribution during creep, small changes in specimen geometry during testing and high local stress states at the positions where the specimen is loaded. The results of the present study show that the unconstrained double shear test technique proposed in [1] yields viable results for shear strains of at least up to 0.10. ([1]: C. Mayr et al., Materials Science and Engineering, A 199 (1995) p. 121)
    Additional Material: 15 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19970281006
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  • 6
    Electronic Resource
    Electronic Resource
    Untersuchungen zum Pulveraluminieren von niedriglegiertem Stahl (13 CrMo 44) (1985)
    Weinheim : Wiley-Blackwell
    Materialwissenschaft und Werkstofftechnik 16 (1985), S. 359-365 
    Details
    ISSN: 0933-5137
    Keywords: Chemistry ; Polymer and Materials Science
    Source: Wiley InterScience Backfile Collection 1832-2000
    Topics: Mechanical Engineering, Materials Science, Production Engineering, Mining and Metallurgy, Traffic Engineering, Precision Mechanics
    Description / Table of Contents: Investigations of Pack Aluminizing of Low-Alloyed Steel (0,13% C, 1% Cr, 0,5% Mo)A diffusion layer after pack-aluminizing of low alloyed steel can be described by the Al-concentration in the surface of the sample, the layer thickness and the surface structure. It is reported, how these characteristic values depend on the composition of the powder mixtures, coating temperature and coating time. After 16 weeks heat treatment at 608 °C and 707 °C, pack-aluminized samples didn't show an increase of layer thickness or decrease of Al-concentration in the sample surface. After the heat treatments a new phase occurs in the layer, which has the composition Fe3Al.
    Notes: Nach dem Pulverpackverfahren werden Diffusionsschutzschichten auf den Stahl 13 CrMo 44 (Werkstoff Nr. 1.7335) aufgebracht. Ihr Aufbau wird durch Aluminiumkonzentration in der Probenoberfläche, Schichtdicke und Oberflächenbeschaffenheit beschrieben. Es wird berichtet, wie diese Kenngrößen von Pulverzusammensetzung, Beschichtungstemperatur und Beschichtungszeit abhängen. In 16wöchigen Auslagerungen pulveraluminierter Proben bei 608 °C unter Schutzgas erfolgt nur eine geringe Abnahme der Aluminiumkonzentration in der Probenoberfläche und keine Schichtverbreiterung. Im Verlauf der Auslagerung bildet sich zunehmend eine neue Phase der Zusammensetzung Fe3Al in der Interdiffusionszone aus.
    Additional Material: 17 Ill.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1002/mawe.19850161008
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  • 7
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    Shift of the blocking temperature of Co nanoparticles by Cr capping (2013)
    American Institute of Physics
    Details
    Publication Date: 2013-12-21
    Print ISSN: 0021-8979
    Electronic ISSN: 1089-7550
    Topics: Physics
    Published by American Institute of Physics
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  • 8
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    A new type of intrinsic two-way shape-memory effect in hooks of NiTi-wires (2003)
    EDP Sciences
    Details
    Publication Date: 2003-10-01
    Print ISSN: 1155-4339
    Electronic ISSN: 1764-7177
    Topics: Physics
    Published by EDP Sciences
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  • 9
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    First cycle shape memory effect in the ternary NiTiNb system (2003)
    EDP Sciences
    Details
    Publication Date: 2003-10-01
    Print ISSN: 1155-4339
    Electronic ISSN: 1764-7177
    Topics: Physics
    Published by EDP Sciences
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  • 10
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    On the role of chemical and microstructural heterogeneities in multistage martensitic transformations (2003)
    EDP Sciences
    Details
    Publication Date: 2003-10-01
    Print ISSN: 1155-4339
    Electronic ISSN: 1764-7177
    Topics: Physics
    Published by EDP Sciences
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