Browse Publications Technical Papers 860062
1986-03-01

Score Resistance of SAE781 (Al-Si-Cd) Automotive Journal Bearing Alloy-A Metallographic Analysis 860062

The excellent score resistance of the journal bearing alloy SAE 781 (A1-4Si-1Cd) is attributed to a thin, 5 µm, layer of the Si phase on the surface. The Si particles have typical cross-sectional areas in the range of 10 - 20 µm2 and show a concentration enrichment of greater than 15 times over that of the nominal alloy composition. Scored bearing surfaces did not exhibit an enriched layer of Si.

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