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Indexed by:期刊论文

Date of Publication:2006-06-01

Journal:MATERIALS TRANSACTIONS

Included Journals:SCIE、EI、Scopus

Volume:47

Issue:6

Page Number:1527-1531

ISSN No.:1345-9678

Key Words:niobium-based alloy; niobium-molybdenum-tungsten ternary alloy; zirconium carbide; high temperature deformation

Abstract:The effect of incorporating ZrC particulates on the microstructure and mechanical behavior of Nb-Mo-W ternary alloy prepared through a powder metallurgy route was investigated. Microstructure of the alloy was examined by optical microscopy, X-ray diffractometry and electron probe microanalysis. Tensile tests were conducted from room temperature up to 1773 K. The results revealed that the incorporation of a small amount of ZrC particle is effective in improving the tensile strength and ductility of Nb-Mo-W alloy at elevated temperature. A transition of fracture mode from a brittle transgranular mode to ductile intergranular mode was observed in the composite with ZrC particles at elevated temperature.