text: how metallurgist identify defects on a turbine blade with x-ray? i need some paper about it. here are a couple of links: http://ois.nist.gov/nistpubs/technipubs/recent/search.cfm?dbibid=3206  http://www3.imperial.ac.uk/portal/page?_pageid=61,355771&_dad=portallive&_schema=portallive  you really need to go to an engineering library and search abstracts online to find papers.