The Effect of Titanium Addition on Microstructure and Properties of Laves Phase Cr2Nb Alloy Synthesized by Hot Pressing

摘要：

The composite materials with a nominal composition of Cr2Nb-24wt.％Ti were fabricated by mechanical alloying followed by hot pressing. The microstructures and properties were investigated on the composites contained with Laves phase prepared through 20 hours mechanical alloying of chromium, niobium and titanium elemental powders and hot pressing at 1250℃ for half an hour. The results indicate that the near full-dense Laves phase Cr2 (Nb,Ti) based alloy with homogeneous composition and microstructure is obtained by mechanical alloying and hot pressing techniques. The dispersed soft second phase Nb solid solutions with the fine grain size less than lum are distributed uniformly on the matrix. The sample has a relative density of 99％, fracture toughness of 5.32MPa·m1/2and compress strength of 2080MPa. Due to the effect of fine-grain and alloying addition, the toughening of the Cr2 (Nb,Ti) based alloy has been fully realized.

关键词： Mechanical alloying Hot pressing Laves phase Cr2Nb Alloying toughening Microstructure and properties

作者: Xuan Xiao Shi Qiang Lu Xian Juan Dong Ming Gang Huang Jun Wei Liu

作者单位: School of Aeronautic and Mechanical Engineering, Nanchang Hangkong University,Nanchang,330063,China School of Aeronautic and Mechanical Engineering,Nanchang Hangkong University,Nanchang,330063,China

会议类型: 国际会议

会议名称: 2011 International Conference on Mechatronics and Materials Processing(2011年机电一体化与材料加工国际会议 ICMMP)

会议地点: 广州

会议语种:英文

页码: 1102-1108

在线出版日期: 2011-11-18（万方平台首次上网日期，不代表论文的发表时间）