Laser Bond Inspection power levels pinpoint adhesive bond integrity levels

LSP Technologies’ David Sokol explains non-destructive LBI process

David Sokol, LSP Technologies Director of Research

David Sokol, Director of Research

In a recent webinar, LSP Technologies Director of Research David Sokol explains how the company’s non-destructive Laser Bond Inspection (LBI) technology can detect faulty bonds, including kissing bonds where the materials are in contact with each other but have no structural integrity.

Adhesive seals for composite materials pose a subtle challenge for quality control and safety, and that is how to detect problematic adhesive bonding without damaging materials or the adhesive bond itself.

A key step in the LBI process is to gradually increase the fluence, or power density, measured as Joules per square centimeter, for laser beams used to measure the integrity of composite adhesive bonds.

LBI readings show shock wave shapes that either reveal integrity in composite adhesive bonds or indicate clear failure in the bonds.  The LBI process, at controlled levels, do not damage materials or compromise the integrity of healthily bonded composites.




Laser Peening to Enhance Additive Manufacturing

Laser peening to treat cracks and voids in additive manufacturing

Laser peening might be one of the key next steps for additive manufacturing.

3-D printing, or additive manufacturing (AM), started as a popular modeling and prototyping tool. Today, Airbus has more than 1,000 3-D printed parts on its A-350 XWB jets, while Lockheed Martin and Boeing are aggressively incorporating the technology as well.

“From simple geometry parts with lots of cracks and voids that you risk breaking in your hand, they’ve come a long way toward robust parts that are actually being used in different industries,” said Micheal Kattoura, a Materials Sciences Engineer at LSP Technologies.

Mission-Critical AM Components

Can AM parts serve in mission-critical functions, facing high pressures, cracking and corrosion? Right now, that depends on the development of strategies for strengthening AM-manufactured parts to compensate for their weaknesses.

Kattoura worked on AM parts and laser peening during his postgraduate work at the University of Cincinnati, and he recently explored the potential of laser peening for improving metal alloys at the 2019 TMS Annual Meeting & Exhibition in San Antonio, Texas, one of the largest annual material science conferences with 4,000 attendees.

The conference featured a symposium on Additive Manufacturing of Metals, or 3-D printing using powdered metals. Kattoura presented his own academic research, entitled, “Effect of Laser Shock Peening Processing Parameters on the Microstructure, Residual Stress, and Fatigue Behavior of Additive Manufactured CoCr Alloy.”

Laser peening has a great deal of promise for enhancing the performance of parts created in additive manufacturing (AM), Kattoura concluded. Manufacturers should soon explore laser peening to provide parts with higher performance and safety, he believes.

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Customizing Laser Peening for Your Parts

Here’s how we work with you and your metal components

Every manufactured metal component is different, performing its functions under widely varying operating conditions. At LSP Technologies, we study the precise nature of threats to metal integrity. Then we design a program of laser peening with tightly designed parameters. The result: improved component reliability, endurance, and safety.

We’ve recently added two pages to the website to help customers know what to expect as we develop customized solutions for parts:

laser peening production facility with robot and laser peening system

  • Precise Laser Peening Parameters Protect Your Metal Parts
    The goal of laser peening is to produce deep residual compressive stresses from the surface of metals. To achieve the desired stress, we manipulate the laser beam’s energy level, spot size, and pulse width. We can also change the angle of attack on the beam, how frequently we deliver laser peening pulses, and how many layers of spots we apply to the part.

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Large cam shaft

  • The LSP Technologies Application Development Process
    We simplify the laser peening solutions process so customers know exactly what to expect. We walk through the steps from initial discussions about your parts through quote, modeling, and solution design. We’ll test to verify results. Ultimately, we’ll find the laser peening services or laser peening equipment solution that fits. We believe the LSP Technologies difference is our experience, engineering, flexibility, and focus on customer satisfaction.

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Laser peening prevents and arrests cracking, corrosion, and other types of metal failure. The deeper these stresses penetrate through laser peening, the better we can improve fatigue life and fatigue strength for metal parts.

Laser peening can typically create these beneficial stress patterns 1-2 mm deep from the surface, 10 times deeper than conventional treatments, such as shot peening.

To learn more and set up a conversation with our materials engineering experts, contact us today.