Mechanical Properties of Ti6Al4V with Plasma Surface Mo-N Co-diffusing layer
Titanium alloys have exhibited a great application potential in modern industrial. However, the poor tribological behavior is a major drawback to their actual uses. To improve the wear resistance of Ti6Al4V, a plasma Mo-N alloying layer was prepared on its surface. The strengthening layer was composed of two sub-layers, Mo-N depositing layer and diffusing layer, with a total depth of 8μm. XRD analysis shows that Mo2N, Ti2N and TiN are the major phases of the surface-modified layers. Nano indentations tests indicate The modified specimens exhibited a bigger elastic modulus and much larger nano-hardness than that of the untreated substrate. The tribological behaviors of the modified layers are investigated by ball-on-disc sliding at room temperature, 300 and 500 ℃ ℃ respectively. The results indicated that the friction coefficients of the modified specimens recorded a lower friction coefficient at room temperature and 300. ℃ At 500℃ Mo-N surface-modified specimen exhibited a higher friction coefficient. Under all the three temperatures the specific wear ratios of the modified specimens decreased greatly comparing to those of the bare metal. After plasma Mo-N co-diffusing the tensile strength of Ti6Al4V decreased slightly.
Qiang Miao Wenping Liang Feng Ying Pingze Zhang Zhengjun Yao
College of Material Science and Engineering, Nanjing University of Aeronautics and Astronautics,Nanjing, China, 210016
国际会议
桂林
英文
1-6
2010-11-16（万方平台首次上网日期，不代表论文的发表时间）