Effects of processing induced microstructure on the fatigue crack propagation of unfilled and short fibre-reinforced PA-6

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Abstract

The microstructure-related fatigue performance of injection-moulded neat and short glass fibre-reinforced (20 and 30 wt%) polyamide (pa-6) was investigated. Change in the microstructure both of the neat and reinforced pa-6 was achieved by alterations in processing variables, ie, mould temperature (TM) and injection speed (vinj), and studied by light and scanning electron microscopy (sem). The microstructure of the composites was characterized by a reinforcing effectiveness parameter, RC. Fatigue crack propagation (fcp) curves indicated the validity of the Paris power law. The fcp response both of the neat and reinforced PA-6 was discussed by the microstructural efficiency (M) approach. An attempt was made to define a reinforcing effectiveness parameter for the matrix, RM, comprising the morphology and thus correlate the fcp response with the microstructure.

Original languageEnglish
Pages (from-to)243-254
Number of pages12
JournalComposites
Volume21
Issue number3
DOIs
Publication statusPublished - 1990

Fingerprint

Fatigue crack propagation
Microstructure
Fibers
Processing
Nylons
Polyamides
Glass fibers
Fatigue of materials
Scanning electron microscopy
Composite materials
Temperature

Keywords

  • crystallinity effects
  • failure mechanisms
  • fatigue crack propagation
  • glass fibre reinforcement
  • injection-moulding
  • polyamide-6

ASJC Scopus subject areas

  • Materials Science(all)
  • Engineering(all)

Cite this

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abstract = "The microstructure-related fatigue performance of injection-moulded neat and short glass fibre-reinforced (20 and 30 wt{\%}) polyamide (pa-6) was investigated. Change in the microstructure both of the neat and reinforced pa-6 was achieved by alterations in processing variables, ie, mould temperature (TM) and injection speed (vinj), and studied by light and scanning electron microscopy (sem). The microstructure of the composites was characterized by a reinforcing effectiveness parameter, RC. Fatigue crack propagation (fcp) curves indicated the validity of the Paris power law. The fcp response both of the neat and reinforced PA-6 was discussed by the microstructural efficiency (M) approach. An attempt was made to define a reinforcing effectiveness parameter for the matrix, RM, comprising the morphology and thus correlate the fcp response with the microstructure.",
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AB - The microstructure-related fatigue performance of injection-moulded neat and short glass fibre-reinforced (20 and 30 wt%) polyamide (pa-6) was investigated. Change in the microstructure both of the neat and reinforced pa-6 was achieved by alterations in processing variables, ie, mould temperature (TM) and injection speed (vinj), and studied by light and scanning electron microscopy (sem). The microstructure of the composites was characterized by a reinforcing effectiveness parameter, RC. Fatigue crack propagation (fcp) curves indicated the validity of the Paris power law. The fcp response both of the neat and reinforced PA-6 was discussed by the microstructural efficiency (M) approach. An attempt was made to define a reinforcing effectiveness parameter for the matrix, RM, comprising the morphology and thus correlate the fcp response with the microstructure.

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