Sintering Mechanism of Ti-6Al-4V Prepared by SPS
(0) Ti-6Al-4V compact bulk was fabricated by Spark plasma sintering (SPS) with initial pressure of 1.7 MPa, holding pressure of 50 MPa, heating rate of 100 ℃/mm, and holding time of 5 min at different sintering temperature.The fracture morphology of the specimen sintered at different temperatures was observed to investigate the sintering mechanism.It can be concluded that there are four stages in the SPS process: activation and rearrangement of particles, connection of particles, growth of sintering neck and bulk deformation.The high-quality bulk compact can be obtained when the above mentioned four sintering stages proceed in turn and are all fully completed.The compact bulk has the best mechanical properties when the sintering temperature was 1050℃.The relative density of the bulk Ti-6Al-4V exceeds 99.5%.The tensile strength and the elongation of Ti-6Al-4V obtained by SPS process are 901 MPa and 13.9%, respectively.
Spark plasma sintering Ti-6Al-4V powder Microstructure Sintering mechanism
Ji Fang Lu Zhao Hui Zhang Zhen Feng Liu Fu Chi Wang
School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR Chi School of Materials Science and Engineering, Beijing Institute of Technology, Beijing 100081, PR Chi
国际会议
北京
英文
149-153
2014-10-19（万方平台首次上网日期，不代表论文的发表时间）