Dry sliding wear behavior of A356-15 pct SiC{sub p} composites under controlled atmospheric conditions

Journal Article · Wed Sep 01 04:00:00 EDT 1999 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-999-0261-z· OSTI ID:684469

Saravanan, R A; Lee, J M; Kang, S B ^[1]

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1. Korea Inst. of Machinery and Materials, Changwon (Korea, Republic of)

The present investigation was carried out to provide a deeper insight into the mechanism of wear behavior of A356-15 vol pct SiC{sub p} composite under controlled argon and oxygen atmospheres through a detailed characterization of worn surfaces and subsurfaces. Dry sliding wear tests were performed for both as-cast and T6-treated specimens using a pin-on-disc machine with three sliding velocities (0.5, 1, and 2 ms{sup {minus}1}) and three loads (1, 2, and 3 MPa). The wear rate of A356-15 vol pct SiC{sub p} composite was lower by nearly one order of magnitude under argon atmosphere compared to the specimens tested under oxygen atmosphere for all experimental conditions. Under argon atmosphere, the mechanism of material removal was by delamination wear and did not change within the parametric regime. In the case of the specimen tested under oxygen atmosphere, the wear behavior of the composite depended on the experimental conditions. At low load and low sliding velocity, the material removal was by abrasion. While at high load and high sliding velocity, the material removal mechanism was by delamination wear. Further, the mechanical mixed layer (MML) formed under argon atmosphere was more stable and homogeneous compared to that formed under oxygen atmosphere. The MML formed under both atmospheres revealed much less in Fe content.

• Sponsoring Organization: USDOE
• OSTI ID: 684469
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 9 Vol. 30; ISSN 1073-5623; ISSN MMTAEB
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
ALUMINIUM BASE ALLOYS
ARGON
COMPOSITE MATERIALS
MORPHOLOGY
OXYGEN
SILICON CARBIDES
SLIDING FRICTION
SURFACES
WEAR RESISTANCE