7/31/2019 Book Review Ultrasonic Flaw Detection for
Technicians
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TECH IN FO
Unit 27, 134 Springvale Road, PO Box 286, Springvale Victoria
3171 (03) 9574 6144 (03) 9574 6133 [email protected]
www.attar.com.auT F E
ATTAR
Advanced Technology Testing and Research
Book ReviewUltrasonic Flaw Detection for TechniciansJ.C.
Drury
Available from ATTAR - 03 9574 6144, [email protected]
Cost $125.00 plus P&P $15.00.
At long last Drury has been updated and reprinted, goneis the
familiar black and green striped cover, mauve or isit lilac, is in.
Some of the contents have beencompressed, chapters 2 to 4 have been
reduced to oneand modified to encompass modern flaw
detectionequipment, but the principles of ultrasound generationand
properties are still the same. Compression, shear,surface and plate
waves are provided with the moredetailed equations for calculating
the velocities, not thattechnicians are expected to do the
calculations. Yescreeping waves are added. The diagrams and
photographs have been redone, but still contain someinaccuracies
due to the use of computer drawingpackages and inadequate use of
the appropriate spellchecker, and I still do not understand why he
writesSnells Law as:
Sin SinRV V
for me Sin Sin
V V
is mathematically correct and far less confusing.
I
1 2
i r
i r
The section on piezoelectric materials and
transducerconstruction has been enlarged to cover newerdevelopments
such as emats, composite probes and theuse of lasers. Similarly the
flaw detector chapter hasbeen updated, gone is the section through
the CRO,though the basic schematic circuit diagram is
stillprovided. The chapter also covers the variety of namesgiven to
some of the control knobs by equipment
manufacturers who have difficulty in standardizingequipment.
Gates are given more coverage as well.However, the Experiments are
gone.
Chapters 9 to 15 take the technician through thepractical
application of compression, shear and surfacewaves, then look at
the inspection of Castings, Forgingsand Welds in the detail
necessary to achieve reliableresults. These sections are, for me,
the essence of thebook because they guide technicians through
theinspection processes for a wide range of applications.The detail
of weld inspection from plates to nozzlesgives the second largest
chapter and is followed by the
largest chapter, on sizing techniques. Although 007sintensity
drop pig has been supplanted by the townplanning inspector checking
house dimensions, thechapter on defect sizing still points out the
problemsassociated with sizing real defects. The chapter hasbeen
expanded to take in TOFD, which is explained witha clarity not
readily available elsewhere.
Drury is still the book for technicians, uncluttered
byunnecessary equations, with plenty of diagramsillustrating the
principles and practice of ultrasonicinspections. It is a must read
for all technicians.
Dr Gary Martin MIEAust CPEngTechnical Director - ATTAR
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