CURRENT WELDING
SPECIFICATIONS
B5.1:2025, Specification for the
Qualification of Welding Inspectors
is now available from the American
Welding Society. This standard defines
the qualifications required for welding
inspectors, including relevant experience,
exam, and proof of visual acuity. The
exam assesses knowledge of welding
processes, procedures, tests, termi-
nology, metallurgy, mathematics, safety,
and quality assurance.
PUBS.AWS.ORG
AN NDT
PROFESSIONAL’S
MEMOIR
The British Institute of Non-Destructive
Testing (BINDT) has published the
second volume of A Peripatetic
Scotsman, a memoir by longtime
NDT veteran Ronald Nisbet, which
describes early NDT methods and appli-
cations in the US as the author recounts
his progression through life, including
his professional activities, travels, and
personal spiritual journey.
While the first volume (124 pages)
covers Nisbet’s early years and life in
France prior to his emigrating to the US
in 1960, the second (106 pages) charts his
journey from Edinburgh, Scotland, and
across the US to Santa Monica, California,
with various stops and stories along the
way.
Both paperbacks are available for
US$45 each and all proceeds from book
sales go to the BINDT Benevolent Fund.
Email the author to arrange purchase.
RONALDTNISBET@GMAIL.COM
WEBINAR ON MATERIAL
CHARACTERIZATION
USING HIGHER
HARMONICS
Predictive health monitoring relies
on advanced sensing techniques for
precise, quantitative insights into material
damage. Second harmonic generation
(SHG) techniques offer a cutting-edge
approach by measuring absolute,
strength-based material parameters,
enabling accurate life predictions when
paired with uncertainty models. This
webinar highlights the integration of SHG
techniques with physics-based models
to characterize damage in metals. SHG
utilizes acoustic waves for bulk, surface,
and guided waves interrogation, all
rooted in fundamental material physics.
Applications include fatigue damage,
thermal embrittlement, irradiation
damage, and sensitization.
Titled “Generation of Higher
Harmonics and their Application of
Material Characterization,” this free
webinar is available in the Center for
Nondestructive Evaluation’s webinar
archive at Iowa State University. It is
presented by Laurence J. Jacobs,
Senior Vice Provost for Education and
Learning at the Georgia Institute of
Technology and a professor of Civil
and Environmental Engineering and
Mechanical Engineering.
CNDE.IASTATE.EDU
CORROSION TESTING
PODCAST
In the fifth episode of Season 2 of
Corrosion Chronicles, Ben McCurry,
Senior Expert of Materials Engineering
and Inspection at BASF Corp., joins
co-hosts Heather Allain and Marc Cook
to dive into the world of corrosion
testing. They cover a wide range of
topics, including the purpose of corro-
sion testing, lab testing versus in-situ
methods, and the use of corrosion resis-
tance tables. The discussion explores
valuable insights from sister plants,
examines decision-making criteria for
conducting tests, and delves into coupon
design. They also tackle advanced topics
like high-pressure/high-temperature data,
the effects of aeration and agitation,
post-exposure examination, grinding
techniques for coupons, field coupon
accessibility, and the impact of process
conditions on field testing results.
MTIPODCAST.PODBEAN.COM
SCANNER
|
NEWMEDIA
16
M A T E R I A L S E V A L U A T I O N • F E B R U A R Y 2 0 2 5
2502 ME Feb.indd 16 1/23/25 1:21 PM

APPLYING DIGITAL
TWIN METHODS
FOR PROCESS-
STRUCTURE-PROPERTY
CORRELATION
ASSESSMENT IN
METAL ADDITIVE
MANUFACTURING
WITH LIMITED
EXPERIMENTAL DATA
Malik Marks, Karnik Aswani,
Gregory Weaver, Fadwa Dababneh,
and Hossein Taheri
Additive manufacturing (AM) is
expanding for fabricating complex, high-
value, and large-size and low-volume
parts. While AM holds significant
potential for producing a variety of
components, it is essential to conduct
quality assessment of AM components
to ensure their safe and reliable oper-
ation. Low-volume fabrication of parts
imposes limitations on the number of
inspection samples for quality verification.
Limited availability of inspection samples
can be addressed by nondestructive
testing (NDT) of fabricated samples,
and the development of digital twin
models. In this study, the process-struc-
ture-property (P-S-P) of stainless-steel AM
parts fabricated via laser powder bed
fusion technique are evaluated using a
limited number of inspection samples
by various material characterization and
NDT. The correlation between process
parameters and part properties has
been assessed. Results indicate the
P-S-P relationship, where apart from
the ultimate strength values, all experi-
mental results display bimodal distribu-
tions, featuring two distinct modes. The
correlation analysis reveals that higher
laser power is associated with increased
RF Z-score and modulus. Utilizing the
experimental findings, a FEM serving as
a digital twin of the parts is constructed.
This model enables the extension of
quality assessment for the parts across
a broader spectrum and facilitates the
examination of P-S-P relations.
KEYWORDS: additive manufacturing (AM)
process-structure-property (P-S-P) digital twin
(DT) finite element modeling (FEM)
https://doi.org/10.1080/09349847.2024.2440353
DISTINCTIVE
APPROACHES TO
HIGH-FREQUENCY
ACOUSTIC PARAMETER
CHARACTERIZATION IN
RIGID POROUS MEDIA
M. Sadouki
This study introduces an alternative
approach aimed at refining the char-
acterization of high-frequency acoustic
parameters in rigid porous materials. An
impedance tube is utilized to analyze
absorption coefficients, providing
insight into the intricate interplay among
acoustic properties, effective density, and
the dynamic compressibility of saturated
fluid. The inverse problem is addressed
using numerical methods to minimize
the variance between experimental
and theoretical absorption coefficients.
Critical parameters, such as tortuosity,
viscous, and thermal characteristic
lengths, are validated through the ​ ​ (1) and ​
δ​(2)–terms representations of the viscous
skin depths. The optimized parameters
derived from both representations are
thoroughly compared and discussed.
KEYWORDS: acoustic characterization
high-frequency analysis rigid porous media
impedance tube absorption coefficient effec-
tive density dynamic compressibility inverse
problem polyurethane foam samples
https://doi.org/10.1080/09349847.2024.2441378
RNDEABSTRACTS
|
SCANNER
RNDE Abstracts presents papers
recently accepted to ASNT’s journal
Research in Nondestructive
Evaluation. To subscribe to RNDE
visit source.asnt.org RNDE.
Members can access the archive of RNDE papers from
prior years (from 1989 to 2024) through Taylor &
Francis Online. Visit asnt.org Standards &
Publications RNDE for details.
2025 NDT
BUYERS GUIDE
The June issue of Materials Evaluation
includes our Annual Buyers Guide, one
of the most comprehensive NDT directo-
ries in the industry. A basic listing in the
printed ASNT Buyers Guide is free, and
upgrades can be purchased for as little
as $450. Visit buyersguide.asnt.org to
update your online profile by 1 April
2025. All information in the June issue
of Materials Evaluation will be based on
your digital listing. For more informa-
tion on advertising in the print Buyers
Guide, go to asntmediaplanner.com.
ACCEPTING
LESTER/MEHL
NOMINATIONS
ASNT is currently accepting nomina-
tions for the 2026 Lester/Mehl Honor
Lecture. The Lester/Mehl Honor Lecture
is established in memory of the
outstanding contributions to ASNT and
the nondestructive testing industry by
Dr. Horace H. Lester and Dr. Robert F.
Mehl. Lester wrote numerous published
articles, fostered techniques, and did
seminal work in ASNT committees. Mehl
was the first person to use radium for
gamma radiography. The Lester Honor
Lecture and Mehl Honor Lecture were
separate recognitions, given every other
year, until 2018. The purpose of the
Lester/Mehl Honor Lecture is to recognize
individuals who have made outstanding
contributions to the science of nonde-
structive testing. Such contributions
may be made in research, applications
technology, management, education,
equipment development, or other
related areas. Nominations for the Lester/
Mehl Honor Lecture must be received
on or before 31 January 2026. Visit
asnt.org/about/honors-and-recognition
for more information. For any questions
regarding the award process or timeline,
please email awards@asnt.org.
|
SOCIETYNOTES The following research was
funded by the ASNT Fellowship
Award and is available open
access until 29 December 2025.
Scan the QR code to view the
paper.
F E B R U A R Y 2 0 2 5 • M A T E R I A L S E V A L U A T I O N 17
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