High Temperature Deformation Behavior and Microstructure Evolution of Harmonic Structure Composites with WC-Co and High Speed Steel

Akiyoshi Koiso; Tomoko Kuno; Mie Kawabata; Kei Ameyama; Hiroshi Fujiwara

doi:10.4028/p-Uo5bM4

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HomeMaterials Science ForumMaterials Science Forum Vol. 1107High Temperature Deformation Behavior and...

High Temperature Deformation Behavior and Microstructure Evolution of Harmonic Structure Composites with WC-Co and High Speed Steel

Abstract:

The high-temperature deformation behavior and microstructural changes of harmonic structure composites with WC-Co alloys and high-speed steel (HSS) were investigated in detail. A harmonic structure composite was fabricated by consolidating the mechanically milled powder having WC-Co and HSS powder. The harmonic structure composite demonstrates the microstructure composed of network area (WC-Co) and dispersed area (HSS). The harmonic structure composite shows a sufficient compressive strength in the compression tests at 773 K, but the compression strength decreases at temperatures of above 873 K. The 0.2% proof stress at high temperature almost unchanged even if the network area fraction changed. Furthermore, the network area plays an important role in the high temperature deformation of harmonic structure composites. These results suggest that the formation of voids for WC-Co boundary sliding and poor sintering is an important factor in stress reduction in the high-temperature compression of harmonic structure composites.

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Periodical:

Materials Science Forum (Volume 1107)

Pages:

55-59

DOI:

https://doi.org/10.4028/p-Uo5bM4

Citation:

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Online since:

December 2023

Authors:

Akiyoshi Koiso*, Tomoko Kuno, Mie Kawabata, Kei Ameyama, Hiroshi Fujiwara

Keywords:

Harmonic Structure, High Temperature Compression, High-Speed Steel, WC-Co

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* - Corresponding Author

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