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Lasers Make Rails Safer for Travel

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Margaret A. Whitney

Researchers at the US Department of Energy's Argonne National Laboratory have developed a laser glazing technique that could reduce costs, pollution and danger in railroad systems. Rails are plagued with subsurface cracks that multiply parallel to the rail surface in the direction of travel, particularly at the gauge corners, according to Ron DiMelfi, a materials scientist at Argonne. Problems are greatest at curves where combined loading from normal forces and steering are the greatest, and severe cracks can even cause trains to derail. Friction is required on top of the rails for...Read full article

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    Published: April 1999
    Research & TechnologyTech PulseLasers

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