Microstructure Features of Large Grains in WC-Co Alloys

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This paper presents a detailed study of large grains carried out by transmission electron microscopy in two WC-Co alloys, one W rich and the other C rich. In the W rich alloy, some large grains are found in contact with the η phase while no connection of the large grains with graphite particles can be pointed out in the C rich alloy. The C content greatly influences the morphology of large grains: they are flatter in the C rich alloy with smoother interfaces. Whatever the C content, they contain few dislocations compared to matrix grains except in a small area where a dense network is often present. One or even several small WC grains with a small angle misorientation or with a Σ=2 coincidence relationship are often found inside the large grains. They have likely been engulfed during the growth of the large grains owing to the low boundary energy.

Info:

Periodical:

Materials Science Forum (Volumes 534-536)

Edited by:

Duk Yong Yoon, Suk-Joong L. Kang, Kwang Yong Eun and Yong-Seog Kim

Pages:

1213-1216

Citation:

A. Delanoë et al., "Microstructure Features of Large Grains in WC-Co Alloys", Materials Science Forum, Vols. 534-536, pp. 1213-1216, 2007

Online since:

January 2007

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$38.00

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