Abstract
The damage evolution during fatigue of a particulate-reinforced metal matrix composite was investigated experimentally by two methods, i. e., by the measurement of the samples’ stiffness values within individual stress – strain hysteresis loops and by the measurement and evaluation of the acoustic emission during cyclic deformation. Both methods indicate that the first damage occurs during the first loading cycle, in tension as well as in compression. After a short period of a high damage rate which is due to fracture of large particles, a longer range of a smaller damage rate follows, in which smaller particles break. Finally, both methods indicate the growth of the main (and final) fatigue crack.
Abstract
Die Entwicklung der Ermüdungsschädigung eines partikelverstärkten Metallmatrix-Verbundwerkstoffes wurde experimentell mit zwei Methoden, nämlich der Messung der Probensteifigkeit innerhalb einzelner Spannung –Dehnung-Hysteresekurven und mit der Messung und Auswertung der während der zyklischen Verformung auftretenden akustischen Emission, untersucht. Beide Verfahren zeigen, dass die erste Schädigung bereits bei dem ersten Belastungszyklus auftritt, und zwar sowohl im Zug als auch im Druck. Nach einer kurzen Periode einer hohen Schädigungsrate, die auf das Brechen von großen Partikeln zurückgeführt wird, folgt ein längerer Bereich mit einer geringeren Schädigungsrate, in dem kleinere Partikel brechen. Gegen Ende der Ermüdungslebensdauer zeigen beide Verfahren das Wachstum des Ermüdungsrisses.
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© 2002 Carl Hanser Verlag, München
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Articles/Aufsätze
- A model for the work hardening of WC–Co “hard metals”
- On the dispersion strengthening mechanisms in ODS materials
- Effect of hydrogen on the mechanical properties of the β titanium alloy Timetal® 21S
- Cyclic deformation behaviour of (α + β) titanium alloys under complex mechanical and physiological loading conditions
- Assessment of the influence of interdendritic shrinkage cavities on the thermo-mechanical fatigue behaviour of the nickel-base superalloy MAR-M247LC
- Effects of static strain aging on residual stress stability and alternating bending strength of shot peened AISI 4140
- On the possibilities to enhance the fatigue properties of ultrafine-grained metals
- New method of determining stress relaxation behavior in creep machines by controlled unloading
- Creep of binary Ni-rich NiTi shape memory alloys and the influence of pre-creep on martensitic transformations
- Interaction of high-cycle fatigue with high-temperature creep in superalloy single crystals
- A unified description of creep in pure and dispersion-strengthened copper
- A new interpretation of flow-stress measurements of high-purity NiAl below room temperature
- A mesoscopic plasticity model accounting for spatial fluctuations of plastic strains, internal stresses and dislocation densities
- Behavior of X-ray peak widths in the Wilkens model of a restrictedly random distribution of dislocations
- Dislocation structure and crystallite size distribution in hexagonal nanomaterials from X-ray peak profile analysis
- Werden gewichtsoptimiert konstruierte Bauteile durch die Verwendung von Leichtmetallen wirklich leichter?*)
- Strain-induced martensite formation in metastable austenitic steels with varying carbon content
- Isothermal bainitic transformation in low alloy steels: factors limiting prediction of the resulting material’s properties
- Fatigue damage evolution in a particulate-reinforced metal matrix composite determined by acoustic emission and compliance method
- Microstructure and modification mechanisms of Si phase in as-thixoformed alloy A356
- Influence of size effect on microstructural changes in cyclically deformed polycrystalline nickel
- Self-diffusion of 71Ge and 31Si in Si –Ge alloys
- On localised corrosive attack, stress corrosion cracking and corrosion fatigue effects in a hardmetal cutting-tool material
- The internal stress during growth of SiC single crystals
- Notifications/Mitteilungen
- Personal/Personelles
- Books/Bücher
- DGM Conferences/Training
Articles in the same Issue
- Frontmatter
- Editorial
- Editorial
- Articles/Aufsätze
- A model for the work hardening of WC–Co “hard metals”
- On the dispersion strengthening mechanisms in ODS materials
- Effect of hydrogen on the mechanical properties of the β titanium alloy Timetal® 21S
- Cyclic deformation behaviour of (α + β) titanium alloys under complex mechanical and physiological loading conditions
- Assessment of the influence of interdendritic shrinkage cavities on the thermo-mechanical fatigue behaviour of the nickel-base superalloy MAR-M247LC
- Effects of static strain aging on residual stress stability and alternating bending strength of shot peened AISI 4140
- On the possibilities to enhance the fatigue properties of ultrafine-grained metals
- New method of determining stress relaxation behavior in creep machines by controlled unloading
- Creep of binary Ni-rich NiTi shape memory alloys and the influence of pre-creep on martensitic transformations
- Interaction of high-cycle fatigue with high-temperature creep in superalloy single crystals
- A unified description of creep in pure and dispersion-strengthened copper
- A new interpretation of flow-stress measurements of high-purity NiAl below room temperature
- A mesoscopic plasticity model accounting for spatial fluctuations of plastic strains, internal stresses and dislocation densities
- Behavior of X-ray peak widths in the Wilkens model of a restrictedly random distribution of dislocations
- Dislocation structure and crystallite size distribution in hexagonal nanomaterials from X-ray peak profile analysis
- Werden gewichtsoptimiert konstruierte Bauteile durch die Verwendung von Leichtmetallen wirklich leichter?*)
- Strain-induced martensite formation in metastable austenitic steels with varying carbon content
- Isothermal bainitic transformation in low alloy steels: factors limiting prediction of the resulting material’s properties
- Fatigue damage evolution in a particulate-reinforced metal matrix composite determined by acoustic emission and compliance method
- Microstructure and modification mechanisms of Si phase in as-thixoformed alloy A356
- Influence of size effect on microstructural changes in cyclically deformed polycrystalline nickel
- Self-diffusion of 71Ge and 31Si in Si –Ge alloys
- On localised corrosive attack, stress corrosion cracking and corrosion fatigue effects in a hardmetal cutting-tool material
- The internal stress during growth of SiC single crystals
- Notifications/Mitteilungen
- Personal/Personelles
- Books/Bücher
- DGM Conferences/Training