Intelligent HIP processing of a Spraycast-X{reg_sign} superalloy for aerospace applications

Book · Tue Dec 31 04:00:00 EST 1996

OSTI ID:442816

Zahrah, T F ^[1]; Dalal, R ^[2]; Kissinger, R ^[3]

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1. MATSYS, Arlington, VA (United States)
2. Howmet Corp., Whitehall, MI (United States)
3. GE Aircraft Engines, Cincinnati, OH (United States)

An eddy current sensor system has been developed to monitor densification during hot isostatic pressing (HIP) of Spraycast-X{reg_sign} superalloy components for aerospace applications. The sensor system was designed, implemented and demonstrated by MATSYS personnel at the Howmet Corporation HIP facility. The eddy current sensor was used to monitor densification of Spraycast-X{reg_sign} Rene`41 ring segments from 95 to 98 percent relative density to full density. The sensor data were verified and validated by metallographic examinations of HIPed specimens. The grain size of the Spraycast-X{reg_sign} Rene`41 was not affected by HIP at both 1,066 C (1,950 F) and 1,121 C (2,050 F). Tensile strengths and 0.2% creep rupture properties were not sensitive to changes in HIP processing conditions. However, tensile ductilities and low cycle properties showed a strong correlation to HIP time at 1,121 C/103 MPa (2,050 F/15 KSI). As hole time at maximum temperature and pressure was increased from 1 to 4 hours, tensile ductilities and low cycle fatigue lives increased. The sensor system can be integrated with an intelligent closed loop control system to monitor and control densification rate and shape distortion.

• OSTI ID: 442816
• Report Number(s): CONF-960515--; ISBN 0-87170-568-0
• Country of Publication: United States
• Language: English

Related Subjects

33 ADVANCED PROPULSION SYSTEMS
36 MATERIALS SCIENCE
BULK DENSITY
CREEP
EDDY CURRENT TESTING
EXPERIMENTAL DATA
FATIGUE
GAS TURBINE ENGINES
GRAIN SIZE
HOT PRESSING
MECHANICAL PROPERTIES
RENE 41
TENSILE PROPERTIES