Hot isostatic pressing of mechanically alloyed Cu-Nb powders

Journal Article · Fri May 01 04:00:00 EDT 1992 · Scripta Metallurgica et Materialia; (United States)

DOI:https://doi.org/10.1016/0956-716X(92)90662-X· OSTI ID:7144174

Vance, R R; Courtney, T H ^[1]

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1. Dept. of Materials Science and Engineering, Univ. of Virginia, Charlottesville, VA (US)

The high hardnesses of mechanically alloyed powders, as well as their often irregular shapes, make them difficult to densify by conventional sintering schemes. Consolidation of mechanically alloyed powders is thus most often accomplished by hot extrusion or a variant thereof. Hot isostatic pressing (HIPing) is a potential route for densification of mechanically alloyed products. In this paper, the authors report on densification progression and describe partially densified microstructures of mechanically alloyed Cu-Nb powders. hot isostatic pressing is also a process for which extensive modeling has been developed. The models are robust ones, and software is now available to predict density as a function of process temperature, pressure and time, provided the ancillary material mechanical and thermal properties are available. The authors also report on the suitability of using this tool for predicting densification during HIPing of mechanically alloyed products.

• OSTI ID: 7144174
• Journal Information: Scripta Metallurgica et Materialia; (United States), Journal Name: Scripta Metallurgica et Materialia; (United States) Vol. 26:9; ISSN SCRME
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
360101* -- Metals & Alloys-- Preparation & Fabrication
360102 -- Metals & Alloys-- Structure & Phase Studies
ALLOYS
COMPUTER CODES
COPPER ALLOYS
CRYSTAL STRUCTURE
DENSITY
FABRICATION
HARDNESS
HOT PRESSING
MATERIALS WORKING
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
MICROSTRUCTURE
NIOBIUM ALLOYS
PHYSICAL PROPERTIES
POWDERS
PRESSING
PRESSURE DEPENDENCE
TEMPERATURE DEPENDENCE
TIME DEPENDENCE