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Dry friction characteristics of Ti-6Al-4V alloy under high sliding velocity
  • 时间:0
  • 分类:TG14[金属学及工艺—金属材料;一般工业技术—材料科学与工程;金属学及工艺—金属学]
  • 作者机构:[1]School of Mechatronic Engineering, Henan University of Science and Technology, Luoyang 471003, China, [2]Theory of Lubrication and Bearing Institute, Xi'an Jiaotong University, Xi'an 710049, China, [3]School of Material Science and Engineering, Henan University of Science and Technology, Luoyang 471003, China
  • 相关基金:Funded by the National Natural Science Foundation of China (No.50375046 and No.50432020)
  • 相关项目:多气氛共存下金属摩擦表面的自适应耦合机制研究
中文摘要:

在接触压力(0.33 1.33 MPa ) 的一个范围上对 GCr15 钢磁盘滑动的 Ti-6Al-4V 合金大头针的 Tribological 行为;滑动速度(30 70 m/s ) 在 unlubricated 条件下面用 pin-on-disc 摩擦计被调查。wear 机制;wear 转变用 SEM 基于穿的表面的考试被分析,版本;XRD。当速度增加时,磨擦系数;Ti-6Al-4V 合金表演的 wear 率也就是,典型转变展示为 0.33 滑动速度的临界数值;0.67 MPa 是 60;40 m/s 分别地。试验性的结果表明 Ti-6Al-4V 合金的 tribological 行为被热机械的效果控制,它与磨擦热连接;对的难粒子。主要包含 Ti 氧化物的 tribolayer;V 氧化物在 Ti-6Al-4V 合金的穿的表面上被形成。

英文摘要:

Tribological behaviours of Ti-6Al-4V alloy pins sliding against GCr15 steel discs over a range of contact pressures (0.33-1.33 MPa) and sliding velocities (30-70 m/s) were investigated using a pin-on-disc tribometer under unlubricated conditions. The wear mechanisms and the wear transition were analyzed based on examinations of worn surfaces using SEM, EDS and XRD. When the velocity increases, the friction coefficient and the wear rate of the Ti-6Al-4V alloy show typical transition features, namely, the critical values of sliding velocities for 0.33 and 0.67 MPa are 60 and 40 m/s, respectively. The experimental results reveal that the tribological behaviours of Ti-6Al-4V alloys are controlled by the thermal-mechanical effects, which connects with the friction heat and hard particles of the pairs. A tribolayer containing mainly Ti oxides and V oxides is formed on the worn surface of Ti-6Al-4V alloy.

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