Influence of milling conditions on the wear resistance of mechanically alloyed aluminium
The tribological behaviour of mechanically alloyed (MA) aluminium-base materials has been studied as a function of processing conditions. [MA Al–NH 3], milled under an ammonia atmosphere in the presence of 3.0 wt.% of ethylene-bisstearamide as process control agent (PCA) and consolidated by a single...
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Veröffentlicht in: | Wear 2005-02, Vol.258 (5), p.906-914 |
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Format: | Artikel |
Sprache: | eng |
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Zusammenfassung: | The tribological behaviour of mechanically alloyed (MA) aluminium-base materials has been studied as a function of processing conditions. [MA Al–NH
3], milled under an ammonia atmosphere in the presence of 3.0
wt.% of ethylene-bisstearamide as process control agent (PCA) and consolidated by a single cycle of cold compaction and sintering, is compared with two MA aluminium materials ([MA Al–air 1.5] and [MA Al–air]), milled in confined air in the presence of 1.5 and 3.0
wt.% of PCA, respectively, and consolidated by a double cycle of compaction and sintering. Elemental aluminium [Al-1], processed by a similar press-and-sinter double cycle, has also been studied as reference material.
Milling in ammonia gas and in the presence of 3.0
wt.% PCA increases the critical load and temperature for transitions in wear regimes. Wear mechanisms are discussed from SEM observation of wear tracks, wear debris, transfer tribolayers and EDS analysis. |
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ISSN: | 0043-1648 1873-2577 |
DOI: | 10.1016/j.wear.2004.09.071 |