High-temperature tensile ductility in WC-Co cemented carbides

Journal Article · Mon Sep 01 00:00:00 EDT 1997 · Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science

DOI:https://doi.org/10.1007/s11661-997-0114-6· OSTI ID:544058

Lee, I C ^[1]; Sakuma, T ^[2]

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1. Kyungpook National Univ., Taegusi (Korea, Republic of)
2. Univ. of Tokyo (Japan). Dept. of Materials Science

High-temperature tensile deformation in WC-Co was investigated at temperatures between 1,150 C and 1,250 C. The flow stress is sensitive to temperature, strain rate, volume fraction of binder, and the addition of other carbides. The stress-strain rate relationship is divided into three regions at each temperature as in superplastic metals. A large tensile elongation over 100 pct was first obtained in WC-6Co and WC-13Co (wt pct) at temperatures of 1,200 C. Contrary to superplastic metals, the largest tensile elongation is not obtained in region II but on the border of regions I and II. The failure mode changes from necking in region I to sharp cracking in region II.

• Sponsoring Organization: USDOE
• OSTI ID: 544058
• Journal Information: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science, Journal Name: Metallurgical and Materials Transactions. A, Physical Metallurgy and Materials Science Journal Issue: 9 Vol. 28; ISSN MMTAEB; ISSN 1073-5623
• Country of Publication: United States
• Language: English

Related Subjects

36 MATERIALS SCIENCE
CHEMICAL COMPOSITION
COBALT
COMPOSITE MATERIALS
ELONGATION
FLOW STRESS
GRAIN SIZE
STRAIN RATE
TEMPERATURE RANGE 1000-4000 K
TENSILE PROPERTIES
TUNGSTEN CARBIDES