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On localised corrosive attack, stress corrosion cracking and corrosion fatigue effects in a hardmetal cutting-tool material

  • Victoria Pugsley EMAIL logo , Gregor Korn , Silvana Luyckx and Hans-Georg Sockel
Published/Copyright: December 7, 2021
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International Journal of Materials Research
From the journal International Journal of Materials Research Volume 93 Issue 7

Abstract

The influence of corrosion on the strength of a commercial hardmetal and its behaviour under static and cyclic loading has been investigated. Tannic acid was chosen as the corrosive medium in order to simulate the environment to which hardmetal wood-cutting tools are exposed. The results show corrosive attack of unloaded specimens to proceed in a highly localised form, producing defects that reduce the strength of the material by up to 50 %. A further reduction in the maximum endured stress is observed when corrosive attack is combined with a simultaneous static load. This is considered to be due to hydrogen embrittlement. When the hardmetal is subjected to cyclic loading in the presence of the corrosive medium, an increase in the fatigue sensitivity of the material occurs, but noteworthy reductions in lifetime are only observed at low stress amplitudes.

Abstract

Der Einfluss der Korrosion auf die Festigkeit eines kommerziellen Hartmetalls und sein Verhalten unter statischer und zyklisch wechselnder Last wurde untersucht. Tanninsäure wurde als Medium gewählt, um die korrosive Umgebung während der Holzbearbeitung zu simulieren. Es konnte gezeigt werden, dass sich der korrosive Angriff an mechanisch unbelasteten Proben auf wenige einzelne Stellen konzentriert, wobei Defekte entstehen, die die Festigkeit des Materials um bis zu 50 % vermindern. Die maximale ertragene Spannung wird noch weiter reduziert, wenn der korrosive Angriff gleichzeitig mit statischer Belastung erfolgt. Dies ist auf Wasserstoffversprödung zurückzüführen. Wird das Hartmetall zyklisch wechselnder Belastung unter korrosiver Umgebung ausgesetzt, beobachtet man eine Steigerung der Ermüdungsempfindlichkeit. Eine nennenswerte Verminderung der Lebensdauer wird aber nur bei niedrigen Spannungsamplituden festgestellt.

Keywords: Hardmetal; Corrosion; Stress corrosion cracking; Fatigue

Dedicated to Professor Dr. Haël Mughrabi on the occasion of his 65th birthday

The authors wish to thank U. Schlierf of the Chair for Surface Science and Corrosion at the University of Erlangen-Nürnberg for assistance with corrosion measurements, and Dr. H.-W. Heinrich of Kennametal Hertel AG for the provision of specimens.

Victoria Pugsley, M. Sc. Institut für Werkstoffwissenschaften Martensstr. 5, D-91058 Erlangen, Germany Tel.: +49 9131 852 7475 Fax: +49 9131 852 7504

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Received: 2002-02-19
Published Online: 2021-12-07
Published in Print: 2021-12-07

© 2002 Carl Hanser Verlag, München

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Articles/Aufsätze
  5. A model for the work hardening of WC–Co “hard metals”
  6. On the dispersion strengthening mechanisms in ODS materials
  7. Effect of hydrogen on the mechanical properties of the β titanium alloy Timetal® 21S
  8. Cyclic deformation behaviour of (α + β) titanium alloys under complex mechanical and physiological loading conditions
  9. Assessment of the influence of interdendritic shrinkage cavities on the thermo-mechanical fatigue behaviour of the nickel-base superalloy MAR-M247LC
  10. Effects of static strain aging on residual stress stability and alternating bending strength of shot peened AISI 4140
  11. On the possibilities to enhance the fatigue properties of ultrafine-grained metals
  12. New method of determining stress relaxation behavior in creep machines by controlled unloading
  13. Creep of binary Ni-rich NiTi shape memory alloys and the influence of pre-creep on martensitic transformations
  14. Interaction of high-cycle fatigue with high-temperature creep in superalloy single crystals
  15. A unified description of creep in pure and dispersion-strengthened copper
  16. A new interpretation of flow-stress measurements of high-purity NiAl below room temperature
  17. A mesoscopic plasticity model accounting for spatial fluctuations of plastic strains, internal stresses and dislocation densities
  18. Behavior of X-ray peak widths in the Wilkens model of a restrictedly random distribution of dislocations
  19. Dislocation structure and crystallite size distribution in hexagonal nanomaterials from X-ray peak profile analysis
  20. Werden gewichtsoptimiert konstruierte Bauteile durch die Verwendung von Leichtmetallen wirklich leichter?*)
  21. Strain-induced martensite formation in metastable austenitic steels with varying carbon content
  22. Isothermal bainitic transformation in low alloy steels: factors limiting prediction of the resulting material’s properties
  23. Fatigue damage evolution in a particulate-reinforced metal matrix composite determined by acoustic emission and compliance method
  24. Microstructure and modification mechanisms of Si phase in as-thixoformed alloy A356
  25. Influence of size effect on microstructural changes in cyclically deformed polycrystalline nickel
  26. Self-diffusion of 71Ge and 31Si in Si –Ge alloys
  27. On localised corrosive attack, stress corrosion cracking and corrosion fatigue effects in a hardmetal cutting-tool material
  28. The internal stress during growth of SiC single crystals
  29. Notifications/Mitteilungen
  30. Personal/Personelles
  31. Books/Bücher
  32. DGM Conferences/Training
https://doi.org/10.3139/ijmr-2002-0125
Keywords for this article
Hardmetal; Corrosion; Stress corrosion cracking; Fatigue

Articles in the same Issue

  1. Frontmatter
  2. Editorial
  3. Editorial
  4. Articles/Aufsätze
  5. A model for the work hardening of WC–Co “hard metals”
  6. On the dispersion strengthening mechanisms in ODS materials
  7. Effect of hydrogen on the mechanical properties of the β titanium alloy Timetal® 21S
  8. Cyclic deformation behaviour of (α + β) titanium alloys under complex mechanical and physiological loading conditions
  9. Assessment of the influence of interdendritic shrinkage cavities on the thermo-mechanical fatigue behaviour of the nickel-base superalloy MAR-M247LC
  10. Effects of static strain aging on residual stress stability and alternating bending strength of shot peened AISI 4140
  11. On the possibilities to enhance the fatigue properties of ultrafine-grained metals
  12. New method of determining stress relaxation behavior in creep machines by controlled unloading
  13. Creep of binary Ni-rich NiTi shape memory alloys and the influence of pre-creep on martensitic transformations
  14. Interaction of high-cycle fatigue with high-temperature creep in superalloy single crystals
  15. A unified description of creep in pure and dispersion-strengthened copper
  16. A new interpretation of flow-stress measurements of high-purity NiAl below room temperature
  17. A mesoscopic plasticity model accounting for spatial fluctuations of plastic strains, internal stresses and dislocation densities
  18. Behavior of X-ray peak widths in the Wilkens model of a restrictedly random distribution of dislocations
  19. Dislocation structure and crystallite size distribution in hexagonal nanomaterials from X-ray peak profile analysis
  20. Werden gewichtsoptimiert konstruierte Bauteile durch die Verwendung von Leichtmetallen wirklich leichter?*)
  21. Strain-induced martensite formation in metastable austenitic steels with varying carbon content
  22. Isothermal bainitic transformation in low alloy steels: factors limiting prediction of the resulting material’s properties
  23. Fatigue damage evolution in a particulate-reinforced metal matrix composite determined by acoustic emission and compliance method
  24. Microstructure and modification mechanisms of Si phase in as-thixoformed alloy A356
  25. Influence of size effect on microstructural changes in cyclically deformed polycrystalline nickel
  26. Self-diffusion of 71Ge and 31Si in Si –Ge alloys
  27. On localised corrosive attack, stress corrosion cracking and corrosion fatigue effects in a hardmetal cutting-tool material
  28. The internal stress during growth of SiC single crystals
  29. Notifications/Mitteilungen
  30. Personal/Personelles
  31. Books/Bücher
  32. DGM Conferences/Training
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