Wear of metals: A consequence of stable/unstable material response

Autor:	SK Biswas
Rok vydání:	2002
Předmět:	Materials science Mechanical Engineering Traction (engineering) Flow (psychology) Compaction Titanium alloy chemistry.chemical_element Surfaces and Interfaces Surfaces Coatings and Films Adiabatic shear band chemistry Aluminium Forensic engineering Fracture (geology) Comminution Composite material
Zdroj:	Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology. 216:357-369
ISSN:	2041-305X 1350-6501
DOI:	10.1243/135065002762355299
Popis:	Wear of metals in dry sliding is dictated by the material response to traction. This is demonstrated by considering the wear of aluminium and titanium alloys. In a regime of stable homogeneous deformation the material approaching the surface from the bulk passes through microprocessing zones of flow, fracture, comminution and compaction to generate a protective tribofilm that retains the interaction in the mild wear regime. If the response leads to microstructural instabilities such as adiabatic shear bands, the near-surface zone consists of stacks of 500nm layers situated parallel to the sliding direction. Microcracks are generated below the surface to propagate normally away from the surface though microvoids situated in the layers, until it reaches a depth of 10-20 μm. A rectangular laminate debris consisting of a 20-40 layer stack is produced. The wear in this mode is severe.
Databáze:	OpenAIRE
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