Method for predicting life expectancy of materials.

摘要

A new method for predicting life expectancy of a metal part used under stress is disclosed. A particular crystal on a polished surface of the part is selected and studied with its electron channeling pattern image to find how much strain is accumulated on a crystal scale. The quality of the image is quantified so that a straightforward relationship between the image quality and strain is found and used to determine the timing of replacement of the part.