American Society for Non-Destructive Testing
Previous Meetings - Pictures and Overviews
NOVEMBER 12, 2018
The Chicago Section of ASNT met on Monday, November 12, 2018 with nineteen guests and members in attendance at the Crazy Pour Restaurant in Villa Park, Illinois. The guest speaker for the evening was Stuart Kleven of Alloyweld Inspection Company, Bensenville, Illinois.
Stuart’s presentation was entitled, “NDT of Additively Manufactured Parts for Aerospace Applications”. The talk was centered on the new ASTM Guide being developed by ASTM Committees E07, E08, and F42 for inspection of additively manufactured parts. Additive manufacturing is rapidly growing in popularity as a manufacturing process for complicated parts. The tremendous cost savings as well as improved mechanical properties is the driving force in the advancement of these manufacturing methods. With the advancements, the part designers are also pushing the limits with respect to defect sizes permitted. With the new processes there are different types of discontinuities that must be detected and evaluated. This has caused companies to investigate new methods for detection, such as computed tomography, thermography, eddy current and process compensated resonance testing. The surface condition of as-built parts also affects the inspection results. The surfaces are not as smooth as traditional parts in some cases and can mask discontinuities. The new document provides tables and charts that highlight which methods could be employed to find specific types of discontinuities.
A number of actual inspection cases were also highlighted during the talk, employing computed tomography and software for evaluation of voids and their volume and effect on total part density.
Stuart Kleven of Alloyweld Inspection (right), receives award of appreciation
from Chuck Johnson of Karden Sales, Chicago Section Chairman