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W–Cu composites subjected to heavy hot deformation

Yang Yu, Xiaoqiang Xu and Wencong Zhang


The effect of plastic deformation on the properties and microstructure of W–Cu composites produced by multi-pass hot extrusion with steel cup was investigated. W–Cu composites were sintered at 1 100 °C and then the sintered billets were firstly extruded at 900 °C with different extrusion ratios. The second hot extrusion was performed at 900 °C. The plastic deformation of copper phase plays a dominant part during the whole extrusion process. The microstructural evolution of W phase during the whole processing of heavy hot deformation can be divided into different stages. Experimental results indicate that the W agglomeration will be broken into fine particles effectively when the accumulated plastic deformation amounts to 97.6 % after the second extrusion.

*Correspondence address, Professor Yang Yu, School of Materials Science and Engineering, Harbin Institute of Technology-Weihai, No. 2, West Wenhua Road, Weihai 264209, P.R. China, Tel.: +86 135-6317-1916, E-mail:


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Received: 2016-11-11
Accepted: 2017-01-17
Published Online: 2017-03-31
Published in Print: 2017-04-13

© 2017, Carl Hanser Verlag, München