ASNT Level III- Visual & Optical Testing
My Level III Self Study Notes Reading 4 Section 4B
My Level III Self Study Notes Reading 4 Section 4B
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Some examples of replicated microstructures, documented with both a<br />
scanning electron microscope and with conventional optical microscopy, are<br />
shown in Figs. 58 to 61. Replication is used for detection of high temperature<br />
creep damage, stress corrosion cracking, hydrogen cracking mechanisms,<br />
as well as the precipitation of carbides, nitrides and second phase<br />
precipitates such as sigma or gamma prime. Replication is also used for<br />
distinguishing fabrication discontinuities from operational discontinuities.<br />
Charlie Chong/ Fion Zhang