Effect of Cu content on microstructure and properties of Fe-16Cr-2.5Mo damping alloy

CORC > 金属研究所 > 中国科学院金属研究所

	Effect of Cu content on microstructure and properties of Fe-16Cr-2.5Mo damping alloy
	Hu, XF; Du, YB; Yan, DS; Rong, LJ; Hu, XF (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China.
刊名	JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
	2018-05-01
卷号	34 期号:5 页码:774-781
关键词	Magnetic Domain-structure Precipitation Behavior Fe Capacity Al Dependence Mechanism Strength Elements Stress
ISSN号	1005-0302
英文摘要	Five Fe-16Cr-2.5Mo damping alloys with different Cu contents (0%, 0.25%, 0.5%, 1.0% and 2.0%) were prepared. The microstructure was observed by scanning transmission electron microscopy (STEM) and the damping behavior was measured by using a dynamic mechanical analyzer (DMA). The results show that the grain size of experimental alloy with (0.25-1.0%) Cu was refined compared with the 0Cu alloy. The Cu element is fully dissolved in the matrix and there are no Cu precipitates and carbides observed. Although the internal stress increases because of Cu addition, the damping capacity of the 0.5Cu and 1.0Cu alloys has been significantly improved. The reason of damping improvement is that the magnetic domain structure is strongly modified. Meanwhile, the strength was improved gradually due to the Cu solid solution strengthening and grain refining. In the 2.0Cu alloy, lots of Cu-riched particles appeared in the matrix. These Cu precipitates with 10-15 nm in size are spherical and homogeneously distributed, which strongly induce strength improvement through precipitation strengthening. On the contrary, the elongation and impact energy of the 2.0Cu alloy decrease sharply. In addition, lots of Cu precipitates will significantly decrease the damping capacity by hindering the mobility of domain walls. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.; Five Fe-16Cr-2.5Mo damping alloys with different Cu contents (0%, 0.25%, 0.5%, 1.0% and 2.0%) were prepared. The microstructure was observed by scanning transmission electron microscopy (STEM) and the damping behavior was measured by using a dynamic mechanical analyzer (DMA). The results show that the grain size of experimental alloy with (0.25-1.0%) Cu was refined compared with the 0Cu alloy. The Cu element is fully dissolved in the matrix and there are no Cu precipitates and carbides observed. Although the internal stress increases because of Cu addition, the damping capacity of the 0.5Cu and 1.0Cu alloys has been significantly improved. The reason of damping improvement is that the magnetic domain structure is strongly modified. Meanwhile, the strength was improved gradually due to the Cu solid solution strengthening and grain refining. In the 2.0Cu alloy, lots of Cu-riched particles appeared in the matrix. These Cu precipitates with 10-15 nm in size are spherical and homogeneously distributed, which strongly induce strength improvement through precipitation strengthening. On the contrary, the elongation and impact energy of the 2.0Cu alloy decrease sharply. In addition, lots of Cu precipitates will significantly decrease the damping capacity by hindering the mobility of domain walls. (C) 2017 Published by Elsevier Ltd on behalf of The editorial office of Journal of Materials Science & Technology.
学科主题	Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
语种	英语
资助机构	National Natural Science Foundation of China [51301170]
公开日期	2018-06-05
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/79330]
专题	金属研究所_中国科学院金属研究所
通讯作者	Hu, XF (reprint author), Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Liaoning, Peoples R China.
推荐引用方式 GB/T 7714	Hu, XF,Du, YB,Yan, DS,et al. Effect of Cu content on microstructure and properties of Fe-16Cr-2.5Mo damping alloy[J]. JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,2018,34(5):774-781.
APA	Hu, XF,Du, YB,Yan, DS,Rong, LJ,&Hu, XF .(2018).Effect of Cu content on microstructure and properties of Fe-16Cr-2.5Mo damping alloy.JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY,34(5),774-781.
MLA	Hu, XF,et al."Effect of Cu content on microstructure and properties of Fe-16Cr-2.5Mo damping alloy".JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY 34.5(2018):774-781.