Effect of Nickel Contents on the Microstructure and Mechanical Properties for Low-Carbon Bainitic Weld Metals | |
Department | 固体润滑国家重点实验室 |
Mao, Gaojun1; Cao, Rui1; Yang J(杨军)2; Jiang, Yong3; Wang S(王帅)2; Guo, Xili3; Yuan, Junjun1; Zhang, Xiaobo1; Chen, Jianhong1 | |
2017 | |
Source Publication | Journal of Materials Engineering and Performance |
ISSN | 1059-9495 |
Volume | 26Issue:5Pages:2057-2071 |
Abstract | 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. |
Keyword | Black Plane Facets Micro-hardness Microstructure Multi-pass Weld Metals Ni Content Tensile Property |
Subject Area | 材料科学与物理化学 |
DOI | 10.1007/s11665-017-2638-2 |
Funding Organization | National Nature Science Foundation of China (No. 51675255);Pre-research of National Basic Research Program of China (2014CB660810);the Rose Willow Outstanding Individual Programs of Lanzhou University of Technology (J201203) |
Indexed By | SCI |
If | 1.331 |
Language | 英语 |
compositor | 第二作者单位 |
Citation statistics | |
Document Type | 期刊论文 |
Identifier | http://ir.licp.cn/handle/362003/22168 |
Collection | 固体润滑国家重点实验室(LSL) |
Corresponding Author | Cao, Rui; Chen, Jianhong |
Affiliation | 1.Lanzhou Univ Technol, State Key Lab Adv Proc & Recycling Nonferrous Met, Lanzhou 730050, Peoples R China 2.Chinese Acad Sci, Lanzhou Inst Chem Phys, State Key Lab Solid Lubricat, Lanzhou 730000, Peoples R China 3.Atlantic China Welding Concumables Inc, Zigong 643000, Peoples R China |
Recommended Citation GB/T 7714 | Mao, Gaojun,Cao, Rui,Yang J,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 J.,Jiang, Yong.,Wang S.,...&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. |
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