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Grindability of alumina fibre reinforced aluminium-alloy matrix composite material

Technical Report:

Abstract

This report describes for the first time the grindability behaviour of Al-2Mg and Al-9Si-3Cu alloy based MMC composites reinforced with varying amounts of short alumna fibres in terms of material removal mechanisms and surface features of ground specimens rather than the traditional wheel wear studies. Conventional and super abrasive grinding wheels (Al203, SiC with vitrified bond, cubic BN and synthetic diamond with organic bond) were used. No optimisation of the grinding operation was intended and tests were carried out for a range of grinding parameters. Grinding forces and surface finish were measured, and the surfaces investigated using optical and scanning electron microscopy. The grinding conditions appear to play little role upon the measured surface finish. The abrasive type on the other hand have controlling influence although this was not readily indicated by the conventional surface finish parameters. SEM studies however, revealed diamond grinding to be the best followed by CBN grinding on the basis of the quality of the surface obtained. Both Al2O3 and SiC displayed insufficient hardness and sharpness, in addition to severe wheel loading from adhesion. Diamond grinding also displayed minimal forces, temperature rise (theoretical estimation) and low friction due to the associated clean decapitation of the hard  More>>
Publication Date:
Dec 01, 1992
Product Type:
Technical Report
Report Number:
NUTEK-89-3419; IM-2928
Reference Number:
SCA: 360601; PA: SWD-93:007419; EDB-94:019777; NTS-94:008819; ERA-19:007068; SN: 94001129799
Resource Relation:
Other Information: PBD: Dec 1992
Subject:
36 MATERIALS SCIENCE; COMPOSITE MATERIALS; GRINDING; ALUMINIUM ALLOYS; FIBERS; MATERIALS WORKING; SURFACE FINISHING; REINFORCED MATERIALS; EXPERIMENTAL DATA; ABRASIVES; DIAMONDS; 360601; PREPARATION AND MANUFACTURE
OSTI ID:
10117278
Research Organizations:
Swedish National Board for Industrial and Technical Development (NUTEK), Stockholm (Sweden); Swedish Inst. for Metals Research, Stockholm (Sweden)
Country of Origin:
Sweden
Language:
English
Other Identifying Numbers:
Other: ON: DE94730438; TRN: SE9307419
Availability:
OSTI; NTIS
Submitting Site:
SWD
Size:
65 p.
Announcement Date:
Jun 30, 2005

Technical Report:

Citation Formats

Chandrasekaran, H, and Johansson, J O. Grindability of alumina fibre reinforced aluminium-alloy matrix composite material. Sweden: N. p., 1992. Web.
Chandrasekaran, H, & Johansson, J O. Grindability of alumina fibre reinforced aluminium-alloy matrix composite material. Sweden.
Chandrasekaran, H, and Johansson, J O. 1992. "Grindability of alumina fibre reinforced aluminium-alloy matrix composite material." Sweden.
@misc{etde_10117278,
title = {Grindability of alumina fibre reinforced aluminium-alloy matrix composite material}
author = {Chandrasekaran, H, and Johansson, J O}
abstractNote = {This report describes for the first time the grindability behaviour of Al-2Mg and Al-9Si-3Cu alloy based MMC composites reinforced with varying amounts of short alumna fibres in terms of material removal mechanisms and surface features of ground specimens rather than the traditional wheel wear studies. Conventional and super abrasive grinding wheels (Al203, SiC with vitrified bond, cubic BN and synthetic diamond with organic bond) were used. No optimisation of the grinding operation was intended and tests were carried out for a range of grinding parameters. Grinding forces and surface finish were measured, and the surfaces investigated using optical and scanning electron microscopy. The grinding conditions appear to play little role upon the measured surface finish. The abrasive type on the other hand have controlling influence although this was not readily indicated by the conventional surface finish parameters. SEM studies however, revealed diamond grinding to be the best followed by CBN grinding on the basis of the quality of the surface obtained. Both Al2O3 and SiC displayed insufficient hardness and sharpness, in addition to severe wheel loading from adhesion. Diamond grinding also displayed minimal forces, temperature rise (theoretical estimation) and low friction due to the associated clean decapitation of the hard fibres. The severe disturbance of the near surface fibres with increasing severity from the case of diamond to Al2O3 grinding, and the development of micro-cavities corresponding to the contour of the fibres in the grinding plane, detected during the present studies are critical factors to be considered in demanding applications. 16 refs, 39 figs, 7 tabs}
place = {Sweden}
year = {1992}
month = {Dec}
}