Influence of vanadium content on the precipitation evolution and mechanical properties of high-strength Fe-Cr-Ni-Mo weld metal

doi:10.1016/j.msea.2019.138739

IMR OpenIR

	Influence of vanadium content on the precipitation evolution and mechanical properties of high-strength Fe-Cr-Ni-Mo weld metal
	Sun, Jian 1,2; Wei, Shitong 1,2; Lu, Shanping 1,2
通讯作者	Lu, Shanping(shplu@imr.ac.cn)
	2020-01-20
发表期刊	MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
ISSN	0921-5093
卷号	772 页码:10
摘要	The significance of the precipitation evolution and interaction between the nanoscale MC carbides and dislocation in a novel high-strength weld metal with different V contents following post-weld heat treatment (PWHT) at 640 degrees C for 2 h durations were investigated using X-ray diffraction (XRD), transmission electron microscopy (TEM), and atom probe tomography (APT). Quantitative calculations of the strengthening contributions were performed by considering the solute atoms, subgrain boundaries, dislocations, and precipitates. According to the TEM observations and extracted XRD results, the volume fractions of the M2C and M3C carbides gradually decreased, while the volume fraction of the nanoscale MC carbides increased with an increasing V content. The APT results indicated that the nanoscale MC carbides primarily contained V and Mo. The precipitation strengthening could be attributed to the fine M2C carbides and discrete MC carbides being randomly distributed in the bainite in the weld metals without V and with 0.1 wt% or 0.18 wt% V, respectively. Numerous nanoscale MC carbides may act as obstacles to inhibit dislocation annihilation during the PWHT, resulting in lower impact toughness with V addition.
关键词	Weld metals X-ray diffraction Transmission electron microscopy Precipitation evolution Mechanical properties
资助者	National Key R&D Program of China
DOI	10.1016/j.msea.2019.138739
收录类别	SCI
语种	英语
资助项目	National Key R&D Program of China[2016YFB0300601]
WOS研究方向	Science & Technology - Other Topics ; Materials Science ; Metallurgy & Metallurgical Engineering
WOS类目	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000509621500005
出版者	ELSEVIER SCIENCE SA
引用统计	被引频次：29[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/137207
专题	中国科学院金属研究所
通讯作者	Lu, Shanping
作者单位	1.Chinese Acad Sci, Inst Met Res, Shenyang Natl Lab Mat Sci, 72 Wenhua Rd, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, 72 Wenhua Rd, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Sun, Jian,Wei, Shitong,Lu, Shanping. Influence of vanadium content on the precipitation evolution and mechanical properties of high-strength Fe-Cr-Ni-Mo weld metal[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2020,772:10.
APA	Sun, Jian,Wei, Shitong,&Lu, Shanping.(2020).Influence of vanadium content on the precipitation evolution and mechanical properties of high-strength Fe-Cr-Ni-Mo weld metal.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,772,10.
MLA	Sun, Jian,et al."Influence of vanadium content on the precipitation evolution and mechanical properties of high-strength Fe-Cr-Ni-Mo weld metal".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 772(2020):10.