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<p>of . Under severe braking conditions, the generated thermal energy can contribute to <a href="page.php?w=thermal_shock">thermal shock</a> or alteration of the wheel's mechanical properties. Ultimately, acute thermal loading leads to a phenomenon called <a href="page.php?w=spall">spall</a>ing. Alternatively, severe braking or <a href="page.php?w=Slippery_rail">low adhesion</a> may stop the rotation of the wheels while the vehicle is still moving, which may cause a <a href="page.php?w=flat_spot">flat spot</a> on the <a href="page.php?w=Wheel-rail_interface">wheel-rail interface</a></p><p>
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