Method and apparatus to tag metal

摘要

A method of tagging an article is disclosed. Data that identifies the article is encoded into at least one stress value. A stress region having a stress that corresponds to the at least one stress value is created in a surface of the article to the tag the article. The at least one stress value is read by a measurement device to read the data and identify the article.

主权项

1. A method of tagging an article, comprising:
selecting identification data for the article; encoding the selected identification data as at least one stress magnitude; and creating a stress region on a welded seam of the article and directly into a surface of the article tagging the article, wherein the stress region includes an impression that produces the at least one stress magnitude in the article, wherein the at least one stress magnitude in the stress region is read identifying the article using a measurement tool that is portable to a location of the article.