Methods of Polymer Weld Quality Evaluation

By Miranda Marcus on Friday, June 15th, 2018 in Papers. No Comments

Selecting the right quality evaluation method for polymer welds is critical for both developing an appropriate welding process and weld maintenance. This paper compares different evaluation methods and discusses strengths and weaknesses of each.


Unique Visual Inspection Solutions in Applied R&D

By Connie Reichert on Thursday, January 11th, 2018 in Papers. No Comments

While commercial vision systems offer a wide range of inspection capabilities, they sometimes require adaptations or enhancements for new applications. EWI has developed several novel adaptations to enhance standard visual inspection systems for unique manufacturing situations, three of which are discussed here.


Paper: Can Metal Additive Manufacturing Compete with Casting?

By Ron Aman on Thursday, November 16th, 2017 in Papers. No Comments

Casting is one of the most common manufacturing processes for metals, but could eventually be displaced by AM. This article exams the advances in AM that are now making this shift a more realistic possibility. This paper explores current and future techniques and options for increasing powder reusability.


Paper: Ultrasonic-Assisted Drilling of 4340 Alloy Steel

By Amin Moghaddas on Friday, October 13th, 2017 in Papers. No Comments

EWI expertise in high power ultrasonics has enabled the development of an industrially hardened UAD system to improve drilling productivity of high strength steels. This article discusses the results of tests of using EWI’s system on 4340 alloy steel.


Paper: Hybrid Ultrasonic Spot Welding of High Strength Materials

By Lindsey Lindamood on Wednesday, October 4th, 2017 in Papers. No Comments

As the demand to build lighter yet stronger vehicles and planes increases, manufacturers are seeking better ways to join lightweight materials, high strength steels, and high strength aluminum. This article discusses EWI’s successful testing of hybrid ultrasonic-resistance welding for these applications.


Paper: In-Process Monitoring Techniques for Laser Powder Bed Fusion

By Paul Boulware on Monday, September 18th, 2017 in Papers. No Comments

In-process monitoring techniques for L-PBF and other metal AM processes is critical for advancing quality control methodologies for critical industrial applications. This paper highlights EWI’s work in evaluating different monitoring techniques and their applicability for inclusion in commercial L-PBF systems.


Paper: Exploring NDT Alternatives for Braze

By Ruth Sunderman on Friday, August 25th, 2017 in Papers. No Comments

For braze inspection, ultrasonic testing is less costly, safer, and more sensitive to defects than x-ray inspection. This paper shows how and why UT is better for this particular application.