Crack thickness

In addition, excessive thicknesses are sometimes applied to large rolls where the roll surface can be reground several large times as It progresses through a long wear life and where each regrind operation provides a new wear surface. The best gauge of a minimum plating thickness is to ask the question "How much wear can this surface stand before it is no longer functional? Precise control of thickness tolerances can be achieved in a particular type of chrome plating generally referred to as thin, dense chrome.

This allows design engineers to improve the performance of metal wear parts measurably altering the micro-inch value of the base wherever the criteria are maximum resistance to abrasion, erosion, galling, cavitation maximum and corrosive resistance wear.

It eliminates the need for grinding, lapping or honing after deposition, except where high finish reflectivity must be attained. There are benefits to be derived from the crack patterns in chrome. In high temperature applications or where a chrome plated surface may be deformed due to surface loads, these tiny cracks act as shock absorbers surface permitting the surface to expand or deflect without breaking the bond between the chrome and the base metal.

Chromium crack patterns can be controlled and several different types of porous chrome have resulted. Careful control of the etching depth creates channels that provide outstanding lubricity when they become saturated with oil. The data and Information presented are based on our experience to date. Guo, W. Irwin, G.

Kane, T. Kotousov, A. Solids and Structures in press. Kown, S. Fracture , Vol. Newman, J. Kirk and A. Baker eds. Newman J. Dedicated to the 65 th birthday of J. Schijve , Edit by A. Beukers, Th. Sinke, A.

Vlot and L. Vogelesang, Delft University Press, Yang, W. Article Google Scholar. Download references. You can also search for this author in PubMed Google Scholar. Reprints and Permissions. International Journal of Fracture , 53—58 Download citation.

Issue Date : October