High temperature tribological behavior of a Ti-46Al-2Cr-2Nb intermetallics

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	High temperature tribological behavior of a Ti-46Al-2Cr-2Nb intermetallics
	Cheng J(程军)1,3 ; Yang J(杨军)1 ; Zhang XH(张兴华)1,3 ; Zhong H(钟红)2; Ma JQ(马吉强)1 ; Li F(李斐)1 ; Fu LC(符立才)1 ; Bi QL(毕秦岭)1 ; Li JS(李金山)2; Liu WM(刘维民)1
刊名	Intermetallics
	2012
卷号	31 页码:120-126
关键词	Titanium aluminides based on TiAl Tribological properties
ISSN号	0966-9795
通讯作者	杨军 ; 李金山
英文摘要	Tribological behavior of a Ti-46Al-2Cr-2Nb alloy, produced by hot-pressed sintering, was investigated using a home-built ball-on-disc tribotester against a Si₃N₄ ceramic ball at a constant speed of 0.188 m s⁻¹ and an applied load of 10 N from 20 to 900 °C. It was found that the friction coefficient decreased slowly with increasing temperature from 20 to 600 °C, and then rose and reached the highest value at 800 °C, but slightly dropped at 900 °C. The wear rate of the alloy, in the magnitude of 10⁻⁴ mm³/Nm, increased mildly with increasing temperature to a maximum value at 400 °C and then dropped rapidly from 600 to 800 °C, and increased a little at 900 °C. The wear mechanism of the alloy transformed from mainly ploughing and small delamination wear at 20–700 °C to plastic deformation and adhesive wear at 800 and 900 °C. The transition of the wear mechanism occurred between 700 and 750 °C. The friction and wear behavior of the hot-pressed Ti-46Al-2Cr-2Nb alloy was comparable to that of a vacuum casting Ti-41.7Al-8.3Nb-0.09Y alloy measured under the same conditions for comparative purposes.
学科主题	材料科学与物理化学
收录类别	SCI
资助信息	the National Natural Science Foundation of China (50801064;51104120)
语种	英语
WOS记录号	WOS:000310399000017
公开日期	2013-07-12
内容类型	期刊论文
源URL	[http://210.77.64.217/handle/362003/3341]
专题	兰州化学物理研究所_固体润滑国家重点实验室
通讯作者	Yang J(杨军)
作者单位	1.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 2.Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China 3.Chinese Acad Sci, Grad Univ, Beijing 100039, Peoples R China
推荐引用方式 GB/T 7714	Cheng J,Yang J,Zhang XH,et al. High temperature tribological behavior of a Ti-46Al-2Cr-2Nb intermetallics[J]. Intermetallics,2012,31:120-126.
APA	Cheng J.,Yang J.,Zhang XH.,Zhong H.,Ma JQ.,...&杨军.(2012).High temperature tribological behavior of a Ti-46Al-2Cr-2Nb intermetallics.Intermetallics,31,120-126.
MLA	Cheng J,et al."High temperature tribological behavior of a Ti-46Al-2Cr-2Nb intermetallics".Intermetallics 31(2012):120-126.