Microstructures and Properties of Welded Joint of Pure Nickel with Thermomechanical Treatment and Roller Compaction

doi:10.13373/j.cnki.cjrm.XY15091901

	Microstructures and Properties of Welded Joint of Pure Nickel with Thermomechanical Treatment and Roller Compaction
	Chai, Tingxi 2,3; Wang, Xijing 2; Wang, Boshi 2; Zhang, Jinyin 2; Liu, Xiao 2; Wang, Jiang 1
刊名	Xiyou Jinshu/Chinese Journal of Rare Metals
	2017-07-01
卷号	41 期号:7 页码:768-774
关键词	Compaction Mechanical properties Microstructure Nickel Plasticity Residual stresses Rollers (machine components) Tensile strength Welding Welds Comprehensive analysis Longitudinal residual stress Microhardness tester Microstructures and properties Pure nickels Roller compaction Scanning electronic microscopy (SEM) Transverse residual stress
ISSN号	02587076
DOI	10.13373/j.cnki.cjrm.XY15091901
英文摘要	Pure nickel N6 welds, as the main research objects, were studied for the process of thermomechanical treatment with roller compaction using the thermomechanical treatment with roller compaction device, and the microstructures and properties of welds were investigated with the help of analysis methods such as optical microscopy (OM), scanning electronic microscopy (SEM), microhardness tester and static strain measurement system. The results showed that with the rolling temperature increasing from 300 to 500 the tensile strength of welds increased from 329.62 to 335.12 MPa, increasing by 1.7%. And the fracture elongation of welds showed the trend of first increasing and then decreasing, which reached maximum 48.44% at 400, increasing by 5.2% than that at 300. The growth rate of the fracture elongation was higher than the tensile strength, which indicated that thermomechanical treatment with roller compaction could improve the plasticity of the welds effectively. The thermomechanical treatment with roller compaction could refine the weld grains with the grain size increasing from 5.5 grade to 6.1 grade under the effect of process, and simultaneously reduce the residual stress of the welds with the descent range of the longitudinal residual stress (σx) and the transverse residual stress (σy), reaching maximum 66.86% and 65.87%, respectively. The comprehensive analysis showed that the thermomechanical treatment with roller compaction could make microstructure uniform, refine grain, reduce the residual stress with a positive effect on improving the weld organization and enhancing the weld performances and further obtained the welds with good matching connection between high strength and high plasticity. © Editorial Office of Chinese Journal of Rare Metals. All right reserved.
语种	中文
出版者	Editorial Office of Chinese Journal of Rare Metals
内容类型	期刊论文
源URL	[http://ir.lut.edu.cn/handle/2XXMBERH/114974]
专题	材料科学与工程学院马克思主义学院
作者单位	1.Jinchuan Group Co., Ltd., Jinchang; 737100, China 2.State Key Laboratory of Advanced Processing and Recycling of Nonferrous Metals, Lanzhou University of Technology, Lanzhou; 730050, China; 3.Peili School of Mechanical Engineering, Lanzhou City University, Lanzhou; 730070, China;
推荐引用方式 GB/T 7714	Chai, Tingxi,Wang, Xijing,Wang, Boshi,et al. Microstructures and Properties of Welded Joint of Pure Nickel with Thermomechanical Treatment and Roller Compaction[J]. Xiyou Jinshu/Chinese Journal of Rare Metals,2017,41(7):768-774.
APA	Chai, Tingxi,Wang, Xijing,Wang, Boshi,Zhang, Jinyin,Liu, Xiao,&Wang, Jiang.(2017).Microstructures and Properties of Welded Joint of Pure Nickel with Thermomechanical Treatment and Roller Compaction.Xiyou Jinshu/Chinese Journal of Rare Metals,41(7),768-774.
MLA	Chai, Tingxi,et al."Microstructures and Properties of Welded Joint of Pure Nickel with Thermomechanical Treatment and Roller Compaction".Xiyou Jinshu/Chinese Journal of Rare Metals 41.7(2017):768-774.