Friction properties and corrosion behavior of fiber laser modified layer on Ti-6Al-4V alloy

doi:10.11817/j.ysxb.1004.0609.2020-35894

	Friction properties and corrosion behavior of fiber laser modified layer on Ti-6Al-4V alloy
	Gao, Feng-Qin 2; Li, Wen-Sheng 2; Wu, Yan-Rong 3; Zhang, Wen-Bin 2; Goransky, Georg 1; Vaganov, Victor 1; Qiu, Xiao-Lai 4
刊名	Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals
	2020-12-01
卷号	30 期号:12 页码:2832-2844
关键词	Aluminum alloys Aluminum metallography Aluminum nitride Corrosion resistance Corrosion resistant alloys Corrosive effects Electrochemical corrosion Fiber lasers Friction Hardening Heat affected zone Microhardness Microstructure Nitrogen Phase composition Sodium chloride Ternary alloys Titanium alloys Titanium nitride Wear of materials Wear resistance Corrosion potentials Corrosion-Resistant Performance Element distribution Microhardness tester Nitrogen concentrations Polarization resistances Reciprocating friction Tribological properties
ISSN号	10040609
DOI	10.11817/j.ysxb.1004.0609.2020-35894
英文摘要	To improve its wear resistance and corrosion resistance, the laser hardening and laser gas nitriding methods were employed to in-situ synthesize a laser modified layer on the surface of Ti-6Al-4V alloy. In this study, layer depth, microstructure, phase composition and element distribution of the modified layers were analyzed by XRD, SEM and EDS, respectively. The microhardness in different depth of the modified layer was tested by a microhardness tester. And the tribological properties and corrosion behavior of Ti-6Al-4V substrate and the modified layers were analyzed by reciprocating friction test and electrochemical corrosion experiment. The results show that both the wear and corrosion resistant performances of the laser nitride layer are the best among Ti-6Al-4V substrate and the laser hardened layer. Under the 2000 W laser power, an optimal laser nitrided layer with uniformly distributed nitrides, free cracks and the maximum depth of 910 μm is in-site synthesized, and with the microstructures of high nitrogen concentration dendritic TiN and low nitrogen concentration fine dendritic Ti2N on the surface and bottom region respectively, and with acicular crystals α'-Ti(N) formed in the heat affected zone. The hardness near the laser nitrided layer surface is about 970 HV0.5, and reduces to 530-360 HV0.5 in the heat affected zone. The wear resistance of the laser nitrided layeris21% and 55% higher than that of the hardened layer andTi-6Al-4V substrate. In 3.5%NaCl solution, the current density of the nitride layer and the hardened layer are one order of magnitude lower than that of Ti-6Al-4V substrate. And compared with the hardened layer and Ti-6Al-4V substrate, the corrosion potential of the nitride layer moves positively by 0.239 V and 0.091V, and the polarization resistance increases 1.9 and 65 times, respectively. © 2020, Science Press. All right reserved.
语种	中文
出版者	Central South University of Technology
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/151098]
专题	材料科学与工程学院
作者单位	1.Belarusian National Technical University, Minsk; 220013, Belarus; 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Dongfang Electric Corporation Dongfang Turbine Co., Ltd., Deyang; 618000, China; 4.Chaoda Valve Group Co., Ltd., Wenzhou; 325105, China
推荐引用方式 GB/T 7714	Gao, Feng-Qin,Li, Wen-Sheng,Wu, Yan-Rong,et al. Friction properties and corrosion behavior of fiber laser modified layer on Ti-6Al-4V alloy[J]. Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,2020,30(12):2832-2844.
APA	Gao, Feng-Qin.,Li, Wen-Sheng.,Wu, Yan-Rong.,Zhang, Wen-Bin.,Goransky, Georg.,...&Qiu, Xiao-Lai.(2020).Friction properties and corrosion behavior of fiber laser modified layer on Ti-6Al-4V alloy.Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals,30(12),2832-2844.
MLA	Gao, Feng-Qin,et al."Friction properties and corrosion behavior of fiber laser modified layer on Ti-6Al-4V alloy".Zhongguo Youse Jinshu Xuebao/Chinese Journal of Nonferrous Metals 30.12(2020):2832-2844.