Mr. Herit Patel Profile

Herit Patel

at Georgia Institute of Technology

SPIE Involvement:

Author

Publications (1)

This will count as one of your downloads.

You will have access to both the presentation and article (if available).

DOWNLOAD NOW

This content is available for download via your institution's subscription. To access this item, please sign in to your personal account.

Email or Username Forgot your username?

Password Forgot your password?

Show

Keep me signed in

No SPIE account? Create an account

Proceedings Article | 19 April 2022 Presentation + Paper

Ultrasonic inspection of additively manufactured metallic components using bulk and guided waves

A. Allam, O. Alfahmi, H. Patel, C. Sugino, M. Harding, M. Ruzzene, A. Erturk

Proceedings Volume 12048, 120480M (2022) https://doi.org/10.1117/12.2614701

KEYWORDS: Ultrasonics, Additive manufacturing, Waveguides, Finite element methods, Defect detection, Phased arrays, Wave propagation, Optical microscopy, Manufacturing, Velocity measurements

Read Abstract +

Additive manufacturing (AM) of metallic components allows for the fabrication of functional metallic components with complex geometries. During AM, unexpected variations in the process parameters may lead to microscale defects which compromise the product functionality. We investigate the use of phased array and guided wave ultrasonic testing as cost-effective and safe quality assurance techniques to detect typical defects generated in selective laser melting (SLM) components. In a typical SLM process, a powdered material is deposited layer by layer then fused together using a laser source to create the desired part geometry. A variation in the laser power or speed can lead to lack-of-fusion or gas porosity defects which might not be detectable during manufacturing. In this work, typical defects are generated in SLM components with thick and thin geometries by deliberately reducing the laser power below the normal values at prespecified locations of the AM samples. The density and shape of the generated defects are first identified using X-ray computed tomography and optical microscopy. A phased array ultrasonic testing probe is then used for imaging pin shaped defects in thick rectangular components. The defect images are also compared to that obtained from numerical simulations using the finite element method. Partially fused defects down to 0.25 mm diameter are detected using this approach. Additionally, a scanning laser Doppler vibrometer is used to image guided waves generated by piezoelectric transducers bonded to thin SLM components. The guided waves are used to detect powder filled cylindrical defects down to 1 mm in size.

My Library

You currently do not have any folders to save your paper to! Create a new folder below.

Folder Name

Folder Description

View contact details

UPDATE YOUR PROFILE

Is this your profile? Update it now.

Sign into your SPIE.org account

Don’t have a profile and want one?

Create an account on SPIE.org

Access to the requested content is limited to institutions that have purchased or subscribe to SPIE eBooks. You are receiving this notice because your organization may not have SPIE eBooks access.*

*Shibboleth/Open Athens users─please sign in to access your institution's subscriptions.

To obtain this item, you may purchase the complete book in print or electronic format on SPIE.org.

ORGANIZATIONAL
Sign in with credentials provided by your organization.

Organizational Username

Organizational Password

Show/Hide Password

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:

Non-members: ADD TO CART

Keywords/Phrases

Search In:

Publication Years