Microstructural characterization of diamond-turned aluminum substrates of memory disks: effects of inclusions on the surface finish and tool wear
Technical Report
·
OSTI ID:5475649
Diamond-turned substrates of computer memory disks of Al-Mg alloys of 5086 and 5186 grades and a worn diamond tool usd in machining 5086 alloy were examined by means of optical and scanning electron microscopy. Detailed analysis of the examination results showed that the undesirable ''orange peel'' finish and accelerated tool wear that occurred in machining 5086 grade alloy disks could be traced to high inclusion content in the material. The iron-containing inclusion particles were shown to be detrimental to the tool life since they could chemically react with the tool material and induce machine tool chatter. The tool wear induced by the inclusion particles then contributed to the ''orange peel'' finish by creating an unevenly cut, rough surface on the disks.
- Research Organization:
- Lawrence Livermore National Lab., CA (USA)
- DOE Contract Number:
- W-7405-ENG-48
- OSTI ID:
- 5475649
- Report Number(s):
- UCID-20832; ON: DE86014938
- Country of Publication:
- United States
- Language:
- English
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