Effect of Nickel Contents on the Microstructure and Mechanical Properties for Low-Carbon Bainitic Weld Metals

doi:10.1007/s11665-017-2638-2

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	Effect of Nickel Contents on the Microstructure and Mechanical Properties for Low-Carbon Bainitic Weld Metals
	Mao, Gaojun 2; Cao, Rui 2; Yang, Jun 3; Jiang, Yong 1; Wang, Shuai 3; Guo, Xili 1; Yuan, Junjun 2; Zhang, Xiaobo 2; Chen, Jianhong 2
刊名	JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE
	2017-05
卷号	26 期号:5 页码:2057-2071
关键词	black plane facets micro-hardness microstructure multi-pass weld metals Ni content tensile property
ISSN号	1059-9495
DOI	10.1007/s11665-017-2638-2
英文摘要	Multi-pass weld metals were deposited on Q345 base steel using metal powder-flux-cored wire with various Ni contents to investigate the effects of the Ni content on the weld microstructure and property. The types of the microstructures were identified by optical microscope, scanning electron microscope, transmission electron microscope, and micro-hardness tests. As a focusing point, the lath bainite and lath martensite were distinguished by their compositions, morphologies, and hardness. In particular, a number of black plane facets appearing between lath bainite or lath martensite packets were characterized by laser scanning confocal microscope. The results indicated that with the increase in Ni contents in the range of 0, 2, 4, and 6%, the microstructures in the weld-deposited metal were changed from the domination of the granular bainite to the majority of the lath bainite and/or the lath martensite and the micro-hardness of the weld-deposited metal increased. Meanwhile, the average width of columnar grain displays a decreasing trend and prior austenite grain size decreases while increases with higher Ni content above 4%. Yield strength and ultimate tensile strength decrease, while the reduction in fracture area increases with the decreasing Ni mass fraction and the increasing test temperature, respectively. And poor yield strength in Ni6 specimen can be attributed to elements segregation caused by weld defect. Finally, micro-hardness distribution in correspondence with specimens presents as a style of cloud-map.
资助项目	Rose Willow Outstanding Individual Programs of Lanzhou University of Technology[J201203]
WOS研究方向	Materials Science
语种	英语
出版者	SPRINGER
WOS记录号	WOS:000400278100010
状态	已发表
内容类型	期刊论文
源URL	[http://119.78.100.223/handle/2XXMBERH/33290]
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	Cao, Rui; Chen, Jianhong
作者单位	1.Atlantic China Welding Concumables Inc, Zigong 643000, Peoples R China 2.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 3.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China
推荐引用方式 GB/T 7714	Mao, Gaojun,Cao, Rui,Yang, Jun,et al. Effect of Nickel Contents on the Microstructure and Mechanical Properties for Low-Carbon Bainitic Weld Metals[J]. JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,2017,26(5):2057-2071.
APA	Mao, Gaojun.,Cao, Rui.,Yang, Jun.,Jiang, Yong.,Wang, Shuai.,...&Chen, Jianhong.(2017).Effect of Nickel Contents on the Microstructure and Mechanical Properties for Low-Carbon Bainitic Weld Metals.JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE,26(5),2057-2071.
MLA	Mao, Gaojun,et al."Effect of Nickel Contents on the Microstructure and Mechanical Properties for Low-Carbon Bainitic Weld Metals".JOURNAL OF MATERIALS ENGINEERING AND PERFORMANCE 26.5(2017):2057-2071.