Nondestructive identification of defects in additive manufacturing (AM) structures using continuous phase-shifted coherent gradient sensing method

Kang Ma; Huimin Xie

doi:10.1117/12.2268375

13 June 2017 Nondestructive identification of defects in additive manufacturing (AM) structures using continuous phase-shifted coherent gradient sensing method

Kang Ma, Huimin Xie

Author Affiliations +

Proceedings Volume 10449, Fifth International Conference on Optical and Photonics Engineering; 1044906 (2017) https://doi.org/10.1117/12.2268375
Event: Fifth International Conference on Optical and Photonics Engineering, 2017, Singapore, Singapore

Abstract

Additive manufacturing (AM) is a rapidly developing technique which presents both substantial opportunities and challenges for manufacturing industry. However, the internal defects will influence the mechanical behavior of AM structures, and thus characterization of the defects of AM materials becomes an interesting issue. In this study, a non-destructive testing technique for AM structures is proposed based on the reflective coherent gradient sensing (CGS) method. Using this method, the slope of a reflective surface can be measured accurately. In the study, the measured structure is firstly prepared a reflective film using replication technique, and then is exerted an external load. The full filed slope of the structure can be measured using CGS and will show a turbulence which can be used to determine the location of the defects of structure (pores or cracks). Using this technique, the spatial resolution of defect size can reach 200μm. From the experimental results, the method shows the merits of full-field, non-contact and real-time measurement. The successful experimental results show that reflective CGS method is effective for detecting the internal defects of AM structures, and will have a good prospect of further application.

Citation Download Citation

Kang Ma and Huimin Xie "Nondestructive identification of defects in additive manufacturing (AM) structures using continuous phase-shifted coherent gradient sensing method", Proc. SPIE 10449, Fifth International Conference on Optical and Photonics Engineering, 1044906 (13 June 2017); https://doi.org/10.1117/12.2268375

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Reflectivity

Additive manufacturing

Nondestructive evaluation

Turbulence

3D printing

3D scanning

Inspection

Show All Keywords

Keywords/Phrases

Search In:

Publication Years