Damping Capacity of Pearlitic Gray Iron and Its Influence on Disc Brake Squeal Suppression Metallurgical Engineering Dept., Research Laboratories, General Motors Corporation

Format:

Conference/Event

Author/Creator:

Miller, Edwin J., author.

Conference Name:

1969 International Automotive Engineering Congress and Exposition (1969-01-13 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1969

Summary:

ABSTRACTSA major increase in damping capacity of pearlitic gray iron for brake discs has been obtained by modification of chemical composition. Car tests indicate that sufficient disc damping can be obtained to substantially reduce squeal tendency in disc brakes. The investigations showed that the frequency dependent damping is due to magnetoelastic and elastoplastic mechanisms at low frequencies. Apparently, the contributions from both mechanisms are enhanced by an abundance of large graphite flakes and a coarse pearlitic matrix microstructure. High carbon and silicon concentrations with minimal pearlite stabilizers are required. High damping capacity brake discs exhibited good braking characteristics and appeared significantly more wear resistant than conventional brake iron discs

Notes:

Vendor supplied data

Publisher Number:

690221

Access Restriction:

Restricted for use by site license