HIGH-ENERGY COMPUTED TOMOGRAPHY FOR ADDITIVE MANUFACTURING OF CRITICAL METAL PRODUCTS
Journal: NDT WORLD
Volume 18 № 3
, 2015
Rubrics: RADIATION INSPECTION
Authors:
Type:
Article
Pages:
from 54
to 59
Status:
Published
Received:
09.08.2015
Accepted:
01.09.2015
Published:
01.09.2015
Language:
Russian
Keywords:
digital technologies, 3D printers, geometric errors, porosity, post-processing
Abstract (English):
The current state of digital additive technologies and areas of their application is analyzed in the paper. The main sources and sizes of geometry errors as well as porosity of additive metal products are estimated. It is shown that post-processing of matching surfaces is necessary at assembling critical mechanical units containing additive parts. Non-destructive testing of critical additive metal articles with complex internal structure does not conform to capabilities of traditional NDT methods; new NDT problems of additive parts are formulated. A unique role of high-energy computed tomography is substantiated and experimentally confirmed; CT can become an important factor in further development of additive technologies by providing a feedback between a technology, an internal structure and performance abilities of the products.
The current state of digital additive technologies and areas of their application is analyzed in the paper. The main sources and sizes of geometry errors as well as porosity of additive metal products are estimated. It is shown that post-processing of matching surfaces is necessary at assembling critical mechanical units containing additive parts. Non-destructive testing of critical additive metal articles with complex internal structure does not conform to capabilities of traditional NDT methods; new NDT problems of additive parts are formulated. A unique role of high-energy computed tomography is substantiated and experimentally confirmed; CT can become an important factor in further development of additive technologies by providing a feedback between a technology, an internal structure and performance abilities of the products.
Keywords:
digital technologies, 3D printers, geometric errors, porosity, post-processing
digital technologies, 3D printers, geometric errors, porosity, post-processing
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