Metals Processing


WPI has a long history in metals technology development driven by industry needs. The WPI Metals Processing Institute (MPI) through its focused centers (Center for Heat Treating Excellence, Advanced Casting Research Center, and Powder Metallurgy Research Center ) is an outstanding example of industry/ academic partnership in practical applied research in all aspects of metals processing, an underlying foundation for manufacturing and other basic economic productivity.

Pending Patents

Apelian/ DeFigueredo,, U.S. Pat. App. No. 10/668,668; U.S. Pat. Pub. No. 20040099351, Alloy substantially free of dendrites and method of forming the same - This invention provides for a simpler method of semi-solid metal production and improved control over the physical characteristics including structure evolution eliminating current mechanical and electromagnetic stirring mechanisms.

Apelian/ Saha, U.S. Pat., App. No. 11/002,726; U.S.Pat. Pub. No. 20050167011, Casting of aluminum based wrought and aluminum based cast alloys via controlled diffusion solidification (CDS) - Spherical microstructure is achieved in this invention enabling casting of wrought alloys, a preferable process for industrial parts manufacture, without the formation of hot cracks or tears that have limited previous casting schemes for these important alloys.

Ludwig/Betterrouk, U.S. patent pending, Infrared defect detection system for online and offline evaluations of powder metallic compacts – While power metallic compact technology offers unique advantages for parts manufacture, industry quality control practice currently relies on indirect measures such as weight and statistical estimation.  The invention provides a direct, non-destructive, and high reliability process quality inspection capability with high sensitivity to early stage flaws.


Shivkumar, U.S. Pat. No. 5,787,958 , Method, casting pattern and apparatus for gasifying residue during metal casting with polymers - This invention overcomes known problems of residue contamination in metal casting via the addition of an oxidizing agent to a polymeric casting pattern,

Ludwig/McNeill, U.S. Pat. No. 6,218,846, Multi-probe impedance measurement system and method for detection of flaws in conductive articles - An improved capability to non-destructively detect and characterize flaws with respect to location, size, orientation and type and with high sensitivity esp. in heterogeneous, multi-phase, or highly porous conductive objects is provided in this invention.

Moser, U.S. Pat. No. 6,365,555 , Method of preparing metal containing compounds using hydrodynamic cavitation* - This invention provides high purity and quality solid state materials (e.g. metal oxide catalysts, piezo and superconducting materials) with control of grain size in the range 1 - 20nm.

Moser, U.S. Pat. No. 6,589,501 , (CIP) Method of preparing metal containing compounds using hydrodynamic cavitation* - This Continuation in Part of 6,365,555 improves the reliability of the earlier method through greater control of cavitation bubble formation.

Ludwig/Apelian, U.S. Pat. No. 6,590,200, Systems for detecting and measuring inclusions - The purity of molten metals is determined with high sensitivity in this invention as well as the characterization of non-metallic inclusions of all types (bubbles, metal oxides, and other process artifacts).

Ludwig/Apelian, U.S. Pat. No. 6,693,443, (CIP) Systems for detecting and measuring inclusions - This Continuation in Part of 6,590,200 improves the performance of the earlier patent via greater particle size and shape characterization.

Chedid/Makhlouf/Sisson , U.S. Pat. No. 7,068,054, Real-Time carbon sensor for measuring concentration profiles in carburized steel - This invention provides a non-destructive method of determining the carbon concentration profile in near surface regions of steel alloys utilizing the skin effect in AC electrical conduction.

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