Failure of a stationary pump engine piston
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Piston failures are not a common occurrence, but they do occur, and failure is usually associated with fatigue crack growth. Most failures initiate at the gudgeon pin hole or in the skirt of the piston. Occasionally they fail elsewhere. In the example covered in this paper, failure initiated in the crown and progressed down to the gudgeon pin before final failure occurred. This paper outlines the cause and mode of failure and shows that small metallurgical discontinuities can contribute to these failures under the right circumstances.
Keywordsaluminum fatigue piston
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- 1.A.L. Kearney, “Properties of Cast Aluminum Alloys,” Properties and Selection: Nonferrous Alloys and Special Purpose Materials, vol. 2, Metals Handbook, 10th ed., ASM International, 1990, p. 161.Google Scholar