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Title: Effects of mold geometry on fiber orientation of powder injection molded metal matrix composites

Fiber orientations in metal matrix composites have significant effect on improving tensile properties. Control of fiber orientations in metal injection molded metal composites is a difficult task. In this study, two mold cavities of dimensions 6x6x90 mm and 10x20x180 mm were used for comparison of fiber orientation in injection molded metal composites test parts. In both mold cavities, convergent and divergent flows were developed by modifying the sprue dimensions. Scanning electron microscope (SEM) was used to examine the fiber orientations within the test samples. The results showed highly aligned fiber in injection molded test bars developed from the convergent melt flow. Random orientation of fibers was noted in the composites test bars produced from divergent melt flow.
Authors:
; ; ;  [1]
  1. Mechanical Engineering Universiti Teknologi PETRONAS Malaysia (Malaysia)
Publication Date:
OSTI Identifier:
22488602
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1669; Journal Issue: 1; Conference: SCMSM 2014: 23. scientific conference of Microscopy Society Malaysia, Tronoh (Malaysia), 10-12 Dec 2014; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
36 MATERIALS SCIENCE; CASTING MOLDS; COMPARATIVE EVALUATIONS; COMPOSITE MATERIALS; FIBERS; MATERIALS TESTING; MATRIX MATERIALS; METALS; MOLDING; ORIENTATION; POWDERS; RANDOMNESS; SCANNING ELECTRON MICROSCOPY; TENSILE PROPERTIES