News

CNDE hosted lab tours during the 2024 State Science & Technology Fair of Iowa on April 4

CNDE participated in this year’s 2024 State Science & Technology Fair of Iowa on April 4 and 5.  This two-day fair, organized by Iowa State University Extension and Outreach, was for students in grades 6 – 12 and provided a space to showcase their research projects.  Students also got the chance to meet with professionals in all areas of science and technology.

CNDE welcomed 16 students to visit our labs and meet with our researchers.  The tour topics included Terahertz, Ultrasonics, Microwave, Eddy Current, and X-ray Radiography.  This was a great opportunity to introduce students to NDE at a young age.

CNDE also sponsored several cash prize awards for top NDE-related research projects.  Two NDE Minor students graciously volunteered their time to judge these projects and accompany fair students on the CNDE tour.

Eddy Current Lab Tour

 

Microwave Lab Tour

Terahertz Lab Tour

Ultrasound Lab Tour

X-Ray Lab Tour

Group photo

ASNT Iowa Section hosts Technical Talk

The American Society of Nondestructive Testing (ASNT) Iowa section hosted a technical talk on Thursday, April 4th. Six members of the Ames Fire Department spoke about thermography applications in firefighting, including somewhat recent cases involving the detection of faulty wiring and the detection of corn syrup and propane leaks after a train derailment. Twenty students in attendance were able to use a FLIR camera with a refresh rate of 60 Hz, which one of the firefighters said was not fast enough to sweep through rooms quickly. Several students were awarded one-year ASNT student membership. As a thank you to the crew for their time, the ASNT officers awarded them a $100 pizza gift card.

CNDE Student Spotlight: Anna Case

Name:  Anna Case

Research areas of interest:  Microwave and millimeter wave materials characterization

Anna Case

Who or what inspired you to pursue your studies in NDE?  As a sophomore in electrical engineering, I was hired by Dr. Zoughi to work in the Applied Microwave Nondestructive Testing Lab.  At the time, I was happy to have the opportunity but didn’t know if it would lead to a career.  Several years later, I can say that everyone I work with, including my mentor, David Moore from Sandia National Labs, has continued to encourage me to stay in the field.

Briefly describe something you have learned or discovered during your time at CNDE that surprised you.  What surprised me the most about coming to CNDE was the difference in work as an undergraduate and as a graduate research assistant.  As an undergraduate student, you are given very specific tasks to accomplish, while as a graduate student, you have more open-ended questions to answer.  It’s important to continue to state the tasks you perform so that you know what you have done – even if it doesn’t always answer the question at first.

What are your future career plans?  I am joining the NDE team at Sandia National Labs in Albuquerque, NM.  I hope to expand my NDE experience with CT, ET, and UT.  I plan to stay involved with the American Society of Nondestructive Testing (ASNT) and the Institute of Electrical and Electronics Engineers (IEEE).

Anna is the recipient of the O.D. & O.U. Trapp Graduate Fellowship through CNDE.

Katie Brinker – IEEE HKN Event Speaker

Katie Brinker former CNDE graduate student, currently Senior Nondestructive Evaluation Engineer at Pratt & Whitney, will be speaking at the IEEE HKN event on the “Realities of a Research Engineer” panel. This panel is focused on making the transition from being a graduate student to working in industry and what it’s like to have an industry career.  The IEEE Instrumentation and Measurement Society will also have a panelist in the “Level Up – Leverage your IEEE Technical Society Membership to Advance your Career” panel.

Pathways to Industry is a 3-day online conference geared towards students and young professionals.  There are technical talks, professional development sessions, a recruitment fair (which includes both companies and graduate schools), and networking sessions.  The conference is open to everyone, not just HKN or IEEE members, and registration will open up at the start of the conference on February 21.

ASNT Iowa Section Hosts February Technical Talk at CNDE

 

On the afternoon of Thursday, February 1st the American Society of Nondestructive Testing (ASNT) Iowa Section hosted their first technical talk of the year.  Luke Titus, who holds a PhD in Theoretical Nuclear Physics from Michigan State University, gave a presentation on the use of Mathematica software for solving ordinary and partial differential equations.  The hybrid talk, which was mainly attended by engineering graduate students, was hosted at the Center for Nondestructive Evaluation (CNDE) with Mathematica pre-installed on computers so that audience members could follow along.  Iowa State University provides Mathematica to students free of charge.  After the presentation, attendees were also emailed the notebook files with examples used during the demonstration.

The next ASNT Iowa Section meeting will be held on Monday, March 4th more details to come!

             

 

Welcome ASNT to CNDE

The American Society for Nondestructive Testing (ASNT) and the Center for Nondestructive Evaluation (CNDE) at Iowa State University (ISU) have long served the nondestructive testing and evaluation (NDT&E) community, providing services, leadership, training, and vital research to many member organizations. ASNT and CNDE also have a strong history of collaboration to further benefit the NDT&E community.  Building upon this history, and to further strengthen the relationship between the two organizations, we are excited to announce that ASNT is the newest organization to join CNDE and its member organizations. This new relationship promises to bring about significant benefits for the broader NDT&E community and these two organizations.  We welcome you following both organizations as we work together in the days and years ahead.

CNDE Featured Researcher: Ron Roberts

Name: Ron Roberts

How long have you been at CNDE?  I began at CNDE in August 1989.

Area(s) of expertise: Ultrasound experiments and computational modeling.Ron Roberts picture

Who or what inspired you to pursue your career in NDE?  I had an interest in physical acoustics as an undergraduate physics major at Purdue University.  I heard in the cafeteria one day that the Air Force was substantially funding research in physical acoustics to transform ultrasound NDT into a science-based discipline.  I came to discover that Don Thompson, then at Ames Laboratory, was heading this Air Force program, and that the preeminent elastic wave theoretician in this program was Jan Achenbach at Northwestern University.  After completing my Ph.D. with Professor Achenbach, Don Thompson began an effort to convince me to come to Ames, and in 1989, after the establishment of CNDE, he succeeded.

Briefly describe one of your technical contributions to the NDE field.  A technical highlight of my career, and of CNDE in general, was the engineering of assured sensitivity inspection for jet engine materials, under the FAA-funded Engine Titanium Consortium.  This work pioneered model-based inspection design in which, given the noise scattering characteristics of a specific alloy microstructure, and the physical properties of the defect to be detected, a focused ultrasound inspection is engineered that assures detection of the defect.  This development represents the realization of the original Air Force goal, combining fundamental science-based understanding of ultrasound microstructure scattering, ultrasound scattering by defects, and the engineering of ultrasound transducers, to yield a specified defect signal-to-noise.  This activity was truly a team effort, calling on the broad technical expertise of numerous CNDE researchers.  My specific role addressed implementation of the engineered inspection using then-new phased array technology, for which phased array transducers were designed to generate a specified highly-focused ultrasound pulse throughout the inspection volume.

What advice would you give a researcher just starting out the NDE field?  Dig down to the fundamentals.  There is always time pressure to proceed superficially, using engineering principles you’ve been told, without fundamental understanding.  I advise taking the time to study in-depth, and derive it yourself from first principles.   There is peace of mind in truly understanding what you’re doing.  Of course, it helps if you work in an environment such as CNDE where this is appreciated, albeit perhaps often on your own time.

ASNT Iowa Section Hosts October Technical Talk at CNDE

The American Society of Nondestructive Testing (ASNT) Iowa section hosted a technical talk at the Center for Nondestructive Evaluation on the evening of Wednesday, October 18th. Gavin Dao,  Director of Business Development at AOS-NDT, discussed the adaptive total focusing method (ATFM) and other ultrasound techniques. A live demonstration followed the talk and students were able to move the probe and view real-time surface estimation and subsurface defects in an aluminum block.

Seventeen members and students were in attendance and one student was awarded a one-year student membership to ASNT as a raffle prize.

DemonstrationAttendees of the meeting

 

 

 

ASNT Iowa Section Technical Meeting – October 18th

American Society of Nondestructive Testing
Iowa Section
Technical Meeting

Learn about ultrasound (UT) for nondestructive testing and watch a demonstration of a phased array system using the adaptive total focusing method (TFM). Learn more ahead of time here:
https://www.aos-ndt.com/white-papers/

Free food will be provided, and students can enter the raffle for a one-year ASNT student membership.

 

CNDE – Fall 2023 IAB Meeting

CNDE hosted its Fall 2023 Industrial Advisory Board (IAB) Meeting on October 2-4.

As usual, CNDE hosted a Pizza with Students event where our board members connected with students interested in working in the NDE community after graduation.

CNDE researchers presented updates on six research projects that started in August 2023.  Board members reviewed the project presentations and gave feedback on each project.

The Post-IAB Seminar was presented by John Aldrin (Computational Tools) where he spoke on “Artificial Intelligence and Machine Learning in NDT – A Perspective on Progress, Challenges, and Future Directions”.

IAB members from ATI, Boeing, Cummins, GE Aerospace, Honeywell Aerospace, John Deere, Naval Nuclear Laboratory (NNL), Pratt & Whitney, and Rolls-Royce were in attendance, as well as invited guests from three other industries.

CNDE Director, Reza Zoughi is the recipient of the 2023 ASNT Lester/Mehl Honor Lecture

CNDE Director, Dr. Reza Zoughi is the recipient of the 2023 American Society for Nondestructive Testing (ASNT) Lester/Mehl Honor Lecture.  The purpose of the Lester/Mehl Honor Lecture is “to recognize individuals who have made outstanding contributions to the science of nondestructive testing. Such contributions may be made in the area of research, applications technology, management, education, equipment development, or other related areas. Nominees must have made outstanding contributions to the science of NDT. Such contributions may be in the area of research, applications, technology, management, education, equipment development, or other related areas.”

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CNDE GRA will present seminar for Lawrence Livermore National Laboratory – Nondestructive Characterization Institute

Farzaneh Ahmadi, CNDE Graduate Research Assistant, will be presenting:

Farzaneh Ahmadi

Millimeter-Wave Near-Field Evaluations of Polylactic Acid Filament Used in Polymer-Based Additive Manufacturing

as part of the Lawrence Livermore National Laboratory (LLNL) – Nondestructive Characterization Institute (NCI) Seminar Series

August 17, 2023

1:00 pm (CST) 

Weblink

ABSTRACT: Polymer-based additive manufacturing (AM) has found extensive application in various industries, including medical and aerospace, owing to its rapid and cost-effective process. Nevertheless, real-time monitoring of the printed parts continues to face challenges and issues. This study compares the effectiveness of three near-field millimeter wave probes – open-ended rectangular waveguide (OERW), dielectric-loaded waveguide (DLW), and extended dielectric-loaded waveguide (EDLW) – in detecting small voids and moisture absorption in polylactic acid (PLA) filaments commonly used in polymeric AM. Dielectric inserts serve as a field concentration tool, potentially improving the spatial resolution of the probes. Numerical electromagnetic simulations were performed at Ka-band (26.5-40 GHz) and V-band (50-75 GHz) using CST Studio Suite® to detect small hemispherical voids and moisture absorption in the feedstock, respectively, followed by experimental validation. The results of the study indicated that, at V-band (50-75 GHz), the spatial resolution of the standard OERW probe was deemed sufficient for detecting small surface voids in stock PLA filaments. In terms of moisture detection, the EDLW probe at Ka-band (26.5-40 GHz), exhibited the highest sensitivity, when loaded with a material possessing a dielectric constant similar to that of the inspected filament.

BIO: Farzaneh Ahmadi received her B.S. degrees in electrical engineering from Shahid Rajaee University (Tehran, Iran) in 2010 and her M.S. degree in electrical engineering from Tarbiat Modares University (Tehran, Iran) in 2012. She is currently working towards her Ph.D. degree in Electrical and Computer Engineering (ECpE) at Iowa State University (ISU). Her research at the ISU Center for Nondestructive Evaluation (CNDE) involves developing In-line nondestructive evaluation methods for 3D printed structures, especially polymers and metals. She is a recipient of CNDE R. B. Thompson Fellowship, the 2023 American Society for Nondestructive Testing (ASNT) Student Travel Grant Award, and the 2022 ASNT Best Student Paper Award (2nd place).

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