W-Cu composites subjected to severe plastic deformation
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.
W-Cu composite Severe plastic deformation Multi pass hot extrusion with steel cup Microstructure evolution Properties
Yang Yu Wencong Zhang
School of Materials Science and Engineering,Harbin Institute of Technology-Weihai,No.2,West Wenhua Road,Weihai 264209,Shandong Province,PR China
国内会议
长沙
英文
301-306
2016-11-11（万方平台首次上网日期，不代表论文的发表时间）