Business Impact

Laser Glazer

A train needs friction between its wheels and the rail’s upper surface in order to move, but friction between the wheel and the sides of the rails is a different matter. Over time, the stress from this friction, especially as trains go around curves, can cause rails to crack; sometimes train wheels even climb over the sides of tracks and derail. The railroad industry combats this problem by applying lubricant to rails, but it’s far from a perfect solution: The environmentally unfriendly stuff seeps into the ground and sometimes spreads to the rail tops, making them slippery. Researchers at Argonne National Laboratory in Argonne, Ill., are using a laser to rapidly melt and re-solidify the steel on the side of the rail. This “glazing “creates a slippery surface that is also more durable. Although research is still in its early stages, principal investigator Ron DiMelfi estimates that laser glazing could save the U.S. railroad industry $40 million per year on fuel and $16 million per year on rail replacements.

Uh oh–you've read all of your free articles for this month.

Insider Premium
$179.95/yr US PRICE

More from Business Impact

How technology advances are changing the economy and providing new opportunities in many industries.

Want more award-winning journalism? Subscribe and become an Insider.
  • Insider Premium {! insider.prices.premium !}*

    {! insider.display.menuOptionsLabel !}

    Our award winning magazine, unlimited access to our story archive, special discounts to MIT Technology Review Events, and exclusive content.

    See details+

    What's Included

    Bimonthly magazine delivery and unlimited 24/7 access to MIT Technology Review’s website

    The Download: our daily newsletter of what's important in technology and innovation

    Access to the magazine PDF archive—thousands of articles going back to 1899 at your fingertips

    Special discounts to select partner offerings

    Discount to MIT Technology Review events

    Ad-free web experience

    First Look: exclusive early access to important stories, before they’re available to anyone else

    Insider Conversations: listen in on in-depth calls between our editors and today’s thought leaders

  • Insider Plus {! insider.prices.plus !}* Best Value

    {! insider.display.menuOptionsLabel !}

    Everything included in Insider Basic, plus ad-free web experience, select discounts to partner offerings and MIT Technology Review events

    See details+

    What's Included

    Bimonthly magazine delivery and unlimited 24/7 access to MIT Technology Review’s website

    The Download: our daily newsletter of what's important in technology and innovation

    Access to the magazine PDF archive—thousands of articles going back to 1899 at your fingertips

    Special discounts to select partner offerings

    Discount to MIT Technology Review events

    Ad-free web experience

  • Insider Basic {! insider.prices.basic !}*

    {! insider.display.menuOptionsLabel !}

    Six issues of our award winning magazine and daily delivery of The Download, our newsletter of what’s important in technology and innovation.

    See details+

    What's Included

    Bimonthly magazine delivery and unlimited 24/7 access to MIT Technology Review’s website

    The Download: our daily newsletter of what's important in technology and innovation

/
You've read all of your free articles this month. This is your last free article this month. You've read of free articles this month. or  for unlimited online access.