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| Analysis on microstructure and mechanical properties of sintered HDH Ti powder with different particle sizes |
| LIU Zhen-zhen,WANG Chun-ming,XIAO Su-fen,CHEN Yun-gui |
| College of Materials Science and Engineering, Sichuan University, Chengdu 610065, China |
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Abstract The effects of HDH titanium powder with various particle size on relative density, microstructure and mechanical properties of sintered titanium were investigated. The results show that the HDH titanium powder with smaller particle size is beneficial to sintering, the sintered density is higher, the pores are spherical and have uniform distribution. With the particle size of HDH titanium powder increasing, the sintered samples have more larger and connected pores. The sintered sample has relative density of 99.5% when HDH titanium powder has particle size less than 38 μm, while the sintered sample has relative density of only 89.1% when the HDH titanium powder particle size is 150-200 μm. With the increasing of titanium particle size, the vickers hardness and the compressive yield strength of sintered titanium decrease. When the particle size of HDH titanium powder is less than 38 μm, the sintered sample has the highest compressive yield strength of 1 000 MPa, and the fracture strength is about 2 250 MPa. When the particle size is 150-200 μm, the sintered sample has the lowest compressive yield strength about 500 MPa.
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Received: 12 January 2015
Published: 17 June 2015
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2015, Vol. 25 
