Forming Characteristics and Analysis of Nitrided Layers During the Laser Nitriding Titanium Alloy

	Forming Characteristics and Analysis of Nitrided Layers During the Laser Nitriding Titanium Alloy
	Yao Xiaochun; Shi Yu; Li Tingqu; Li Wensheng
刊名	RARE METAL MATERIALS AND ENGINEERING
	2019-12
卷号	48 期号:12 页码:4060-4067
关键词	laser nitriding titanium alloy surface morphology molten pool geometry forming coefficient
ISSN号	1002-185X
英文摘要	Ti-6Al-4V alloy was nitrided in nitrogen atmosphere using diode laser, in order to study the influence of line energy, laser power and scanning speed on the surface morphology, molten pool geometry, width, penetration depth and the forming coefficient of the nitrided layers. The surface and cross-section morphologies of the nitrided layers were taken by optical and scanning electron microscopy, and the hardness was measured by microhardness tester. The results show that the surface morphology are composed of the smooth and rough surface. When the surface temperature of the molten pool is low, increasing the interaction time has little effect on the surface morphology. With the increase of laser power under the same line energy, the melting depth and width of the nitrided layer increase, and the forming coefficient decreases. As the scanning speed decreases under the same laser power, the penetration depth and width increase, and the forming coefficient reduces. When the forming coefficient is very small, the nitrided layers will produce longitudinally distributed cracks. The convection form and the strength result in the formation of a hemispherical interface, a finger interface, a W-shaped interface and so on; besides, multiple inflections happen in the slope of the boundaries of molten pool.
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WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	中文
出版者	NORTHWEST INST NONFERROUS METAL RESEARCH
WOS记录号	WOS:000504920800040
状态	已发表
内容类型	期刊论文
源URL	[http://219.246.112.31/handle/2XXMBERH/56503]
专题	材料科学与工程学院省部共建有色金属先进加工与再利用国家重点实验室
通讯作者	Shi Yu
作者单位	Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Yao Xiaochun,Shi Yu,Li Tingqu,et al. Forming Characteristics and Analysis of Nitrided Layers During the Laser Nitriding Titanium Alloy[J]. RARE METAL MATERIALS AND ENGINEERING,2019,48(12):4060-4067.
APA	Yao Xiaochun,Shi Yu,Li Tingqu,&Li Wensheng.(2019).Forming Characteristics and Analysis of Nitrided Layers During the Laser Nitriding Titanium Alloy.RARE METAL MATERIALS AND ENGINEERING,48(12),4060-4067.
MLA	Yao Xiaochun,et al."Forming Characteristics and Analysis of Nitrided Layers During the Laser Nitriding Titanium Alloy".RARE METAL MATERIALS AND ENGINEERING 48.12(2019):4060-4067.