Machining damage

Machining damages the surface, destroys coatings and gelcoats if they exist and, to avoid the risks of later attack, it is sometimes necessary to (gel)coat after machining. 

Microstructure examination of a finished surface is an important analysis to be carried out. It is very useful, since it can provide important information about the material properties and reliability. It can show the surface cracks or other machining damage improper machining causes transformation of the microstructure. So, microstructure examination is important in this investigation to show the effect of the DP and RB on the surface microstructure as well as the plastic deformation depth. 

Matsuo, Y., Ogasawara, T., Kimura, S., Sato, S., and Yasuda, Y., "The Effects of Annealing on Surface Machining Damage of Alumina Ceramics," Journal of the Ceramic Society of Japan, (Inti. Edition), Vol. 99, No. 5,1991, pp. 371-376. 

G. D. Quinn, L. K. Ives, S. Jahanmir, Machining Damage Cracks How to Find and Characterize Them by Fractography, Ceram. Eng. SciProc., 24 (4), 383-394 (2003). 

The identification and the analysis of risk, and making rational decisions based on the known risk, are the best preventive management tools a maintenance workforce can use. The risk assessment will allow a company to maximize its safety program and thus reduce accidents. The risk assessment process should be formalized in order to reduce accidents that could cause injuries, death, machine damage, and longer equipment stoppage. One must learn in maintenance that one must reduce risk at all times. In any task there are risk and thus the reduction or elimination of risk will make all tasks more successful and safe. 

Mistake proofing (Poka Yoke) A procedure that prevents defects or malfunction during manufacture by, for example, eliminating choices that lead to incorrect actions stop a process if an error is made prevent machine damage. 

Evans, A.G. (Ed), Fracture In Ceramic Materials Toughening Mechanisms, Machining Damage, Shock Noyes Publications (1984). 

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