inspection connectionnov 17, 2015 · ative. that is, much of the energy of the ultrasound wave was...

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Volume 1 Issue 3

November 16th, 2015

Special points of interest:

New meetings on the schedule

The new Air Capital website

Follow us on Facebook

Membership Chair Vacant In

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Testing the Liberty Bell 1

November Meeting Summary 2

Board Contact Information 2

Upcoming Events 3

Join ASNT 3

November Meeting Minutes 4

Advertising 5

December Meeting 6

Inside this issue:

November 2015 The Inspection Connection Newsletter

TNT Focus: Testing the Liberty Bell

Nondestructive Testing of the Liberty Bell

Bicentennial Inspection. In 1975, X-ray fluorescence to determine metallic content at the bell’s surface was per-formed at ten different points around the rim.Again in 1975, radiography was done in preparation for a bicentennial move to a new site. Universal Technical Testing Laboratories, Inc. of Philadelphia, Pennsylvania was asked to make the radiographic examination. Forty single-section radiographs covering the entire bell were made using iridium-192 in 52 and 100 Ci source strengths in a gamma ray projector. Some previously unknown shrinkage separations and cracks around the shoulder of the bell were detected. New cracks and those known to exist were definitively charted for the first time as a result of these radiographs.

At the same time, a single double-wall radiograph (at the time, the world’s largest) was suggested by Ralph E. Turner, a former ASNT president. The large radiographic exam, performed by Technical Operations, Inc. of Bos-ton, Massachusetts, was technically challenging and required special licensing from the Nuclear Regulatory Com-mission for the 670 Ci cobalt-60 source. Much of the setup for the test required custom fabrication. Fourteen sheets of film measuring 52 by 84 in. were stacked in a frame constructed specifically to accommodate film of such large dimensions. The source was shielded in a lead ball twenty-four inches in diameter and weighing two thousand pounds.A collimator confined the radiation to a five-foot beam spread and was aimed precisely with a riflescope. Reinforcement and special rigging were required to move the source, shielding and containing structure (weight concentration over two tons) into place inside Independence Hall’s 18th century structure. Six tons of high-density concrete block were hauled into place behind Independence Hall to provide shielding. The exposure took seven and a half hours and determined a crack in the bell’s clapper and cracks and corrosion in tie rods in the bell’s yoke.

Damage Assessment. Plans were already in place in April of 2001 to examine the bell’s condition again as prepa-ration for a move in 2003 to the new Liberty Bell Center now under construction. The exam schedule was expe-dited when the bell was hit repeatedly by a vandal with a hand sledge.

Conam Inspection, Inc. of Sharon Hill, Pennsylvania was asked to evaluate the damage with radiographic testing. Conam assembled a team of twelve that would invest over 300 hours in the preparation and execution of an eight hour inspection.Vince Roding, of the 1975 inspection team, also participated in the project.A total of six radio-graphs in 14 × 17 in. and 10 × 12 in. formats reproduced the film size and some of the positioning of the 1975 radiographs along with added perspectives.

These radiographs were scanned, converting them to digital format. The images were then processed to enhance readability. Interestingly, the images from 1975 were also scanned and digitally enhanced. Allowing for improve-ments in film technology and some film degradation in the 1975 radiographs, the images were quite good and pro-vided an excellent platform for comparison. Digitally acquiring the radiographs placed them in a permanent for-mat that will not degrade over time.

The National Park Service, most interested in pinpointing the active crack tip and determining substantial differ-ences in the area around it, decided to investigate further with other NDT methods. The Boeing Company was asked to submit a proposal for evaluation of the bell. Boeing originally planned to develop an eddy current test to pinpoint the tip and to make an overlay plotting it. The overlay could then be used for future comparison pur-

In May 2001, Boeing began by mapping the bell with electrical conductivity to determine brittle areas (Figure 2a and b). Ultrasonic testing was then used to determine laminar flaws. Laminar flaws are parallel to the surface but inside the structure and therefore not apparent in a surface inspection. Unfortunately, the bell surface was greatly attenu-ative. That is, much of the energy of the ultrasound wave was absorbed instead of reflected. Because of this, the sen-sitivity of the ultrasound inspection was diminished and only gross laminar flaws could be detected.

From The NDT Technician ,A Quarterly Publication for the NDT Practitioner, Vol. 1 No. 3 Pg. 3-4. Reprinted with permission of the American Society for Nondestructive Testing, Inc.

For the rest of this article please go to ASNT.org TNT archive.


For the November meeting of the Air Capital Section, members and guest gather

in Wichita, KS at the Metal Finishing Company on November 5th for a presenta-

tion by guest speaker Paul Petersen. There were a total of seventeen attendees.

The meeting began with a board meeting, then a Social hour followed by a din-

ner that all attendees enjoyed sponsored by Metal Finishing. Paul Petersen’s

presentation “Aerospace Applications for Phased Array Ultrasonics” consisted

of the basic theory and applications of Phased Array Technology on composite

and metal bond material. Following the presentation Paul Petersen took all atten-

dees to the lab where a demonstration was done on composite material with flat

and curved arrays. Attendees were also allowed to test material themselves. Paul

was also awarded a plaque and an ASNT multifunction knife as a thank you for

the support and the great presentation.

INSPECTION CONNECTION

Chairman:

John Saunders

[email protected]

Vice-Chairman:

Gian Suazo

[email protected]

m

Treasurer:

Jay Amos

[email protected]

Secretary:

Hollie Becker

[email protected]

dier.com

Program Chair

Gian Suazo

Education Chair:

Joe Clasen

[email protected]

Membership Chair:

Vacant

Year Book Chair

Michale Potts

Directors at Large:

Bryce Boe

Michael Daehling

Bob Potter

Jay Amos

Interested in getting

Involved?

Contact one of our board

members for openings and

joining committees.

For general questions or

more information about our

section, please email:

[email protected]

ASNT - Air Capi ta l Sec t ion Board

Air Capital November Meeting


November

Paul Petersen—Phased Array Inspection & MFCO Tour

December

Brad Hoskins—Silean

January

No Events

February

ASQ—ASNT Joint Meeting

March

Air Capital Fundraiser

April

Board Meeting— Elections

May

No events

June

Richard Gostautas— Acoustic Emissions Presentation

Installment of New Officers

Upcoming Events

VOLUME 1 ISSUE 3

A Special thank you to Metal Finishing Company for sponsoring the Air Capital November meeting!

TH

AN

K Y

OU

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Join the ASNT

Have you or someone you know been on the fence about joining the ASNT? There couldn’t be a better time than now to join! With the spike in interest in NDT in recent years, the Air Capital is gaining new profes-sionals on a regular basis. As a member run organization, you have the opportunity to have a

say in the future of this industry. Connect with members of similar experience and learn from mem-bers that paved the way. There are a variety of membership types and discounts.

To learn more about joining or to sign up today, go to: www.asnt.org

Receive a FREE subscription to ME when you join!

http://www.asnt.org



October Board Meeting Minutes

Spartan Graduates for Hire

NDT and QC

Graduates Every 6 Weeks

For resumes contact : Damon Bowling, Vice President Student Services, 918-831-5388, [email protected]

Meeting called to order at 5:35 p.m. by John Saunders Members Present: John Saunders, Gian Suazo, Jay Amos, Bryce Boe, Michael Daehling, Joe Clasen (by Telecom). Agenda: Agenda was distributed to board via email prior to meeting and approved. October Meeting Minutes: Approved none opposed Treasurer’s Report: One moreGold advertising check received. Checking balance$327.94, Savings balance $16,912.50. Committee Goals: Yearbook committee goals: create and publish yearbook by November 15th. Education Committee goals: grow member-ship and partner with local industries for students internships. Membership Chair still Vacant, volunteer needed. Surveys: Saunders will create a survey and send to members. Bylaws: All revisions recommended by the ISC will be added and final vote on bylaws via email. Website: Website up and running facebook still needs work. Venue for Meetings: There will be no set venue at the moment. The section will continue to select different locations. Fundraiser: Fundraiser options consist of a raffle, trap shoot, bowling or golf tournament. Board members were each given an option to re-search cost to determine final choice. Regional Director Position: Joe is in preliminary talks with Bob Potter to replace him. Any other members interested should contact Bob Potter. National Delegate Position for SOC: Suazo nominated but will check with employer to assure support. Clasen will take position if Suazo if unable. Board agreed to cover airfare. Meeting adjourned at 5:30 p.m.


VOLUME 1 ISSUE 3

Check out Cowley College in the Sep-tember issue of Materials Evaluation pg 1153!

Would you like to see your ad here?

Contact Hollie Becker for details and pricing!

Do you have an article you would like to share with the Air Capital Section?

Please contact an officer if you do and you may see it soon in our next issue!


American Society for Non-Destructive Testing

Air Capital Section December Meeting

When : December 3rd, 2015

Time : 5:30—Board Meeting

6:00—Social Hour & Meal

7:00—Brad Hoskins “ X-Ray Film Recycling—A Cost Savings Initiative”

Location : Joe’s in Old Town 222 N Washington Ave. Wichita, KS 67202

RSVP : Deadline is December 1st, 2015 to [email protected]

Cost : Free to Air Capital Members , $10 for non-members

Topic : Silean has saved clients several hundred thousand dollars in film archiving cost as well as

returning over 3 million dollars to them by recycling their film. Overhead costs area real issue for

companies so projects that will reduce these costs should be aggressively pursued.

Speaker Bio : Brad Hoskins is President of Silean,LLC. Brads educational background consist of an Associates degree in NDT technology from Eastern Idaho Technical College and Lean Sys-tems Certification from the University of Kentucky. Brad has over 30 years of NDT experience in-cluding 5 years in the film recycling business. He has also worked for ATK providing NDT in-spection for the NASA Space Shuttle Program as a technician, NDT Engineer, and finally as an NDT Manager. Brad was also awarded the Propulsion System Achievement Award for over 1 mil-lion in cost savings.


Brad Hoskins

President

Silean, LLC

inspection connectionnov 17, 2015 · ative. that is, much of the energy of the ultrasound wave was...

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