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Microstructure,Phase Transformation,Precipitation Behavior and Mechanical Properties of P/M Cu40Zn-1.0 wt%Ti Brass Alloy via Spark Plasma Sintering and Hot Extrusion

Microstructure,Phase Transformation,Precipitation Behavior and Mechanical Properties of P/M Cu40Zn-1.0 wt%Ti Brass Alloy via Spark Plasma Sintering and Hot Extrusion

作     者:Shufeng Li Hisashi Imai Katsuyoshi Kondoh 

作者机构:Faculty of Materials Science and EngineeringXi'an University of Technology Joining and Welding Research InstituteOsaka University 

出 版 物:《Journal of Materials Science & Technology》 (材料科学技术(英文版))

年 卷 期:2013年第29卷第11期

页      面:1018-1024页

核心收录:

学科分类:080503[工学-材料加工工程] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程(可授工学、理学学位)] 

基  金:supported by the Japan Science and Tech-nology Agency(JST) 

主  题:Brass Spark plasma sintering Extrusion Microstructure Mechanical property Precipitation Phase transformation 

摘      要:The effect of titanium addition on the microstructure and mechanical properties of brass Cu4OZn has been studied via the powder metallurgy (P/M) route. The water-atomized Cu4OZn-1.0 wt% Ti alloy powder was consolidated at different temperatures in the range of 400-600℃ using spark plasma sintering (SPS) and hot extrusion subsequently. Results show that the super-saturated solid solution titanium element in rapidly cooled brass Cu4OZn powder created high chemical potential for a precipitate reaction, showing significant grain refinement effects on the consolidated Cu4OZn matrix. Consequently, excellent mechanical properties were obtained by precipitation hardening and work hardening after sintering and extrusion, with yield strength of 390 MPa, ultimate tensile strength of 617 MPa, and Vickers micro-hardness of 192 HV, which are 28.7%, 23.4%, and 23.9% higher values than those of extruded Cu4OZn brass, respectively.

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