Positron Systems Detects Damaged Superalloys

BOISE, Idaho, Sept. 8, 2003 -- Positron Systems, a developer of nondestructive and material characterization testing, has announced it can detect and quantify damage in single crystal nickel-based superalloys at the atomic level. Single crystal superalloys are commonly used by the aerospace and power generation industries in expensive components such as turbine engine blades and vanes.

In a study sponsored by the National Science Foundation, Positron Systems demonstrated that its photon-induced positron annihilation (PIPA) technology can accurately evaluate surface and subsurface damage and provide remaining useful life assessments in test coupons and turbine blades. The study also showed that PIPA can quantify the effectiveness of life extension/material rejuvenation treatments such as shot peening, heat treatment and thermal barrier coatings, the company said.

"Understanding the degradation process of single crystal nickel based superalloys and realizing opportunities to manage component damage progression is a critical aspect for optimizing any turbine engine component reliability and safety program," said Steve Bolen, president and CEO of Positron Systems. "PIPA can help keep these components in long-term safe operation with minimal surveillance and maintenance, thereby significantly reducing costs."

The company is working with a number of partners, such as Siemens Westinghouse Power Corp., to characterize the microstructural changes in operational land-based and jet gas turbine engine components to achieve better parts management and significant cost savings.

For more information, visit: www.positronsystems.com