A new method of processing ferrous materials such as steel, developed by researchers at Oak Ridge National Laboratory, promises to produce a new class of materials with novel microstructures and superior properties. The method involves applying a strong magnetic field to a cooling alloy, which results in enhanced properties and reduced heat-treating, fabrication and energy costs. Phase transformation in a cooling alloy determines the microstructure of the final material. Applying a strong magnetic field enables the critical transformation to a ferromagnetic phase, which determines the microstructure, to occur faster and at higher temperatures. The resulting steel should be easier to machine than conventional steel, which translates into increased production and longer tooling life. The Department of Energy's Energy Efficiency and Renewable Energy Industrial Technologies Program funded the work.
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