Hot isostatic pressing of nickel aluminide powders

Technical Report · Mon Feb 01 04:00:00 EST 1988

OSTI ID:5051783

Wright, R N; Flinn, J E

Powder processing of boron-microalloyed Ni/sub 3/Al alloys followed by consolidation using hot isostatic pressing has been investiged. The influences of time, temperature, and pressure on HIP consolidation have been evaluated and the results are presented in the form of a consolidation map. Microstructural evolution during HIPping and subsequent heat treatment has been characterized and related to the mechanical properties. It has been found that processing parameters must be carefully controlled to suppress sulfur segregation to prior particle boundaries while promoting boron segregation to grain boundaries. Alloying with chromium has been found to promote densification and improve high temperature properties. 12 refs., 10 figs., 2 tabs.

• Research Organization: EG and G Idaho, Inc., Idaho Falls (USA)
• DOE Contract Number: AC07-76ID01570
• OSTI ID: 5051783
• Report Number(s): EGG-MS-7986; ON: DE88009677
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
ALLOYS
ALUMINIUM ALLOYS
BORON ADDITIONS
BORON ALLOYS
CHROMIUM ADDITIONS
CHROMIUM ALLOYS
CRYSTAL STRUCTURE
DENSITY
FABRICATION
HOT PRESSING
MATERIALS WORKING
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NICKEL ALLOYS
NICKEL BASE ALLOYS
PHYSICAL PROPERTIES
POWDERS
PRESSING