Influence of milling conditions on the wear resistance of mechanically alloyed aluminium

• Published in: Wear Vol. 258; no. 5; pp. 906 - 914
• Main Authors: Bermúdez, María-Dolores, Carrión, Francisco J., Iglesias, Patricia, Martínez-Nicolás, Ginés, Herrera, Enrique J., Rodríguez, José A.
• Format: Journal Article
• Language: English
• Published: Lausanne Elsevier B.V 01.02.2005; Amsterdam Elsevier Science; New York, NY
• Subjects: Aluminium; Applied sciences; Dry wear; Exact sciences and technology; Friction, wear, lubrication; Machine components; Mechanical engineering. Machine design; Mechanical milling; Sintering; Steel; Aluminium; Mechanical milling; Steel; Sintering; Dry wear; Scanning electron microscopy; Transition temperature; Aluminium base alloys; Process control; Ethylene; Machining; X ray spectrometry; Aluminium alloy; Powder metallurgy; Mechanical alloying; Ammonia; Wear transition; Wear; Milling; Critical load; Wear resistance; Critical temperature; Tribology
• ISSN: 0043-1648; 1873-2577
• DOI: 10.1016/j.wear.2004.09.071

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.