【摘 要】
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The effect of severe 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
【机 构】
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School of Materials Science and Engineering,Harbin Institute of Technology-Weihai,No.2,West Wenhua R
【出 处】
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特种粉末冶金及复合材料制备/加工第一届学术会议
论文部分内容阅读
The effect of severe 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 1100℃and then the sintered billets were hot extruded at 900℃ with different extrusion ratios.The second hot extrusion was performed at 900℃.The plastic deformation of copper phase plays a dominant part during the whole extrusion processing.The microstructure evolution of W phase and Cu copper phase during the processing of severe plastic deformation can be divided into three stages.Experimental results and modeling indicate that the W agglomeration will be broken into fine particles effectively distributed homogeneously in the elongated Cu phase during the third stage when the accumulated plastic deformation amount achieve 97.6% after the second extrusion.
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