NDT News

Understanding Hydrogen Induced Cold Cracking in Welds

Karsten Madsen | Apr 26, 2017

https://www.linkedin.com/pulse/understanding-hydrogen-induced-cold-cracking-welds-karsten-madsen

"Like others, I probably contributed to some weld cracking earlier in my career through ignorance about the effects of hydrogen on some metals. Problem #1 … working as a young Welder, there was usually a stash of 7018 electrodes somewhere handy saving a trip to the holding oven. Problem #2 … I'm showing my age in saying that at that time, microwave ovens had not yet showed up in cafeterias to warm up meals. No problems though as electrode ovens did a good job of heating up leftover mac 'n cheese or a can of baked beans for a warm dinner.

Adding to our ignorance, the welding rods used in both of these circumstances seemed none the worse for the wear making welds that appeared to be acceptable. So the loosely applied rules about keeping the electrodes only in dry holding ovens and used within 4 hours did not seem to justify compliance. Moisture absorbed by SMAW electrode flux coating is only one source of hydrogen entering a weld deposit. It can also exist in FCAW wires, SAW flux or come from high ambient humidity or lubricants used in other manufacturing processes. Moisture of course is hydrogen and oxygen while oils and greases are usually hydrocarbons.

My intent here is to explain in understandable terms why it is so important to control weld exposure to hydrogen for those higher strength steels that are susceptible to hydrogen induced cold cracking (HICC). I’m not a Metallurgist and I may be taking some liberties in the following explanation, but to me at least hearing the effects of HICC first hand and my analogies to explain this phenomenon seem to make sense."

Click here to read more about the strategy.

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How Nondestructive Testing Helps Keep Railways on Track

By Olympus NDT Applications Team - January 31, 2017

"One of the oldest methods of modern transportation, the history of rail dates back nearly 500 years. With an expansive and aging infrastructure, railroads require constant support to maintain their integrity and operate safely.

Many types of nondestructive testing (NDT) techniques have been used to help ensure the quality of both the rail and the many components that make up a rail car. These methods range from the so-called “car knocker,” which uses acoustic resonance to detect cracked wheels, to the “oil and whiting” test used for fatigue crack detection in steam locomotive pins and axles. Currently, ultrasonic testing (UT) is the preferred method of NDT in the railroad industry.

Ultrasonic testing uses high frequency, directional sound waves to measure material thickness, find hidden flaws, or analyze material properties. UT requires the use of a transducer that transmits and/or receives the ultrasound signals being passed into the metal and a flaw detector to process the results. While UT is used in a range of applications, it is especially important for rail testing."

If you are interested in exploring a career in Nondestructive Testing, talk to an NDT Instructor today 855-313-0325!

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Non-Destructive Testing Equipment & Services - Analysis & Global Forecast to 2013 - 2020

Non-Destructive Testing Equipment & Services Market by Contact Methods, Non-Contact (Radiography, Thermography, Visual Testing), Services (Inspection, Rental, Training, Consultation), Application & Geography - Analysis & Global Forecast to 2013 - 2020

BY PR NEWSWIRE

NOVEMBER 26, 2014 05:25 PM EST

The below excerpt is from Sys-Con Media. Click Here to read the entire article and download the full report

"Non-Destructive Testing (NDT) is the process of inspecting, testing, or evaluating materials, components, or assemblies for discontinuities or differences in characteristics without altering the original attributes. It has the property to determine the discontinuities and differences in material characteristics. Non-Destructive Testing (NDT) is broadly divided into NDT equipment and NDT services market. Key NDT inspection methods covered in the report are ultrasonic testing, magnetic and electromagnetic testing, Infrared (IR) thermography testing, shearography testing, radiographic testing, liquid penetrant testing, eddy current testing, and visual testing. 

Since the NDT equipment used are very complex in their kinematics and very expensive, and they not only differ widely but there is also lack of NDT equipment knowledge among the end users, all these are acting as a driver for the growth of Non-Destructive Testing (NDT) services market such as Non-Destructive Testing (NDT) inspection, Non-Destructive Testing (NDT) training, Non-Destructive Testing (NDT) renting services, and Non-Destructive Testing (NDT) consultation services are growing rapidly with high growth potential in the future. There is a lot of opportunity for the existing players and new entrants to innovate and differentiate the products range."

The American Institute of Nondestructive Testing (Baxter, MN) is a personalized hybrid teaching school for nondestructive testing. We pride ourselves in educating our graduates on the latest NDT equipment. AINDT also has relationships with cutting edge equipment organizations. Give us a call 855-313-0325 to talk more about Nondestructive testing equipment and services. 

 

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Thinking about a career in NonDestructive Testing?

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Thinking about a career in NonDestructive Testing? The American Institute of NonDestructive Testing has Open Enrollment now until October 2nd. Don't delay - Classes for fall semester start October 7th! Call today to talk to an instructor about a new career in NDT 855-313-0325. 

Click Here to request a phone call from an Instructor today! Learn more about a career in NDT and our complete online training courses. 

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Why Choose American Institute of Non-Destructive Testing?

The American Institute of Non-Destructive Testing offers experience you can trust with over 40 years in the Non-Destructive Testing and Inspection b2ap3_thumbnail_iStock_000013773964_Medium.jpgIndustry. With a combination of online and classroom training - in only 16 weeks you can be on your way to a high demand career!

  • High Earning Potential - Starting pay in the Non-Destructive Testing industry ranges from $40 – 50,000 per year. Most graduates can look forward to earning $100,000 or more within a few years!

  • Low Cost - We have created the most affordable NDT and inspection training packages available. Our packages include all the necessary on-line training modules, study material, books, hands-on lab work, and housing costs.

  • No Guess Work – AINDT understands the industry demands. Our focus is to consistently deliver the most well-equipped, responsible, and knowledgeable professionals to the Non-Destructive Testing needs of civic-minded organizations and communities.

Open enrollment for October semester starts June 1st. Read more about why you should choose the American Institute of Non-Destructive Testing. If you are ready to change your life, contact an Enrollment Specialist at 855-313-0325 to learn more about non-destructive testing and YOUR exciting new career path! 

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