In Situ Observation of Kinetic Processes of Lath Bainite Nucleation and Growth by Laser Scanning Confocal Microscope in Reheated Weld Metals

doi:10.1007/s11661-017-4348-7

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	In Situ Observation of Kinetic Processes of Lath Bainite Nucleation and Growth by Laser Scanning Confocal Microscope in Reheated Weld Metals
	Mao, Gaojun 1,2; Cao, Rui 1,2; Guo, Xili 3; Jiang, Yong 3; Chen, Jianhong 1,2
刊名	METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE
	2017-12
卷号	48A 期号:12 页码:5783-5798
关键词	Backscattering Bainite Crystallization Nucleation Scanning Scanning electron microscopy Welds Electron backscattering diffraction Field emission scanning electron microscopes In-situ observations Laser Confocal Scanning microscopes Laser scanning confocal microscopes Microstructural morphology Nucleation and growth Prior austenite grains
ISSN号	1073-5623
DOI	10.1007/s11661-017-4348-7
英文摘要	The kinetic processes of nucleation and growth of bainite laths in reheated weld metals are observed and analyzed by a combination of a laser confocal scanning microscope and an electron backscattering diffraction with a field emission scanning electron microscope. The results indicate that the surface relief induced by phase transformation is able to reveal the real microstructural morphologies of bainite laths when viewed from various angles. Five nucleation modes and six types of growth behaviors of bainite laths are revealed. The bainite lath growth rates are measured to vary over a wide range, from 2 mu m/s to higher than 2000 mu m/s. The orientations of the bainite laths within a prior austenite grain are examined and denoted as different variants. On the basis of variant identification, the reason is analyzed for various growth rates which are demonstrated to be affected by (1) the density of the high-angle misorientation in it, (2) the included angle between habit planes of different variants, and (3) the direction of lath growth with respect to the free (polished) surface.
资助项目	National Nature Science Foundation of China[51675255]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000426864300005
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/32990]
专题	省部共建有色金属先进加工与再利用国家重点实验室材料科学与工程学院
通讯作者	Chen, Jianhong
作者单位	1.Lanzhou Univ Technol, Dept Mat Sci & Engn, Lanzhou 730050, Gansu, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Gansu, Peoples R China 3.Atlantic China Welding Consumables Inc, Zigong 643000, Peoples R China
推荐引用方式 GB/T 7714	Mao, Gaojun,Cao, Rui,Guo, Xili,et al. In Situ Observation of Kinetic Processes of Lath Bainite Nucleation and Growth by Laser Scanning Confocal Microscope in Reheated Weld Metals[J]. METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,2017,48A(12):5783-5798.
APA	Mao, Gaojun,Cao, Rui,Guo, Xili,Jiang, Yong,&Chen, Jianhong.(2017).In Situ Observation of Kinetic Processes of Lath Bainite Nucleation and Growth by Laser Scanning Confocal Microscope in Reheated Weld Metals.METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE,48A(12),5783-5798.
MLA	Mao, Gaojun,et al."In Situ Observation of Kinetic Processes of Lath Bainite Nucleation and Growth by Laser Scanning Confocal Microscope in Reheated Weld Metals".METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE 48A.12(2017):5783-5798.