A Novel Electrochemical Machining Process for Hard Passive Alloys

Award Information
Agency: Department of Defense
Branch: Air Force
Contract: N/A
Agency Tracking Number: 33023
Amount: $740,310.00
Phase: Phase II
Program: SBIR
Awards Year: 1998
Solicitation Year: N/A
Solicitation Topic Code: N/A
Solicitation Number: N/A
Small Business Information
3155 Research Blvd., Suite 105, Dayton, OH, 45420
HUBZone Owned: N
Woman Owned: N
Socially and Economically Disadvantaged: N
Principal Investigator
 Chengdong Zhou
 (513) 252-2113
Business Contact
Phone: () -
Research Institution
This Small Business Innovation Research Phase I project will demonstrate a novel process for electrochemical machining nickel superalloys and other hard, passive alloys. Nickel-based superalloys are widely used in various industries, such as aerospace and automative industries. However, nickel superalloys are difficult-to-cut materials. Traditional mechanical methods failed to machine these superalloys. Electrochemical Machining (ECM) is an effective method to machine nickel-based superalloys and other hard, passive alloys due to its high removal rate, no tool wear, and no burrs on the machined surface. However, conventional ECM suffered in poor dimensional accuracy and surface quality caused by cavitation and pitting. Our novel approach will improve the machining accuracy and surface quality for hard, passive alloys by 1) localize current, 2) maintain hydrodynamic uniformity in the interelectrode gap, 3) reduce electrode gap, 4) reduce electrolyte flow rate, and 5) prevent oxide film rehealing problem. The overall objective is to develop a novel electrochemical machining process for hard passive alloys. The specific objective in Phase I is to demonstrate the feasibility to machine nickel-based superalloys with our novel approach to improve dimensional accuracy and surface quality. Anticipated Benefits: Our novel process will be used to machine hard passive alloys, such as nickel-based superalloys. If commercialized, the process is expected to have wide applications in aerospace, automative, and other industries which use hard, passive alloys.

* Information listed above is at the time of submission. *

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