Cu Precipitation and Its Effect on Damping Capacity and Mechanical Properties of FeCrMoCu Alloy

doi:10.11900/0412.1961.2016.00504

IMR OpenIR

	Cu Precipitation and Its Effect on Damping Capacity and Mechanical Properties of FeCrMoCu Alloy
	Hu Xiaofeng 1; Du Yubin 1,2; Yan Desheng 1; Rong Lijian 1
通讯作者	Hu Xiaofeng(xfhu@imr.ac.cn)
	2017-05-11
发表期刊	ACTA METALLURGICA SINICA
ISSN	0412-1961
卷号	53 期号:5 页码:601-608
摘要	Fe-Cr based damping alloys have high mechanical properties and good corrosion resistance, which have been applied to reduce vibration and noise. Their high damping behavior is primarily attributed to the stress-induced irreversible movement of 90 degrees magnetic domain walls. Most researches mainly focused on the damping behavior of these alloys. However, little attention has been paid to the mechanical properties, which are the important consideration for engineering applications. Recently, a FeCrMo damping alloy with Cu addition was found to possess higher damping capacity and higher mechanical properties. In this work, scanning transmission electron microscopy (STEM) and dynamic mechanical analyzer (DMA) were used to investigate the Cu precipitation and its influences on damping capacity and mechanical properties of FeCrMoCu alloy (1.0% and 2.0% Cu addition, mass fraction) with different cooling rates. The results show that the Cu element in 1.0Cu alloy is fully dissolved in the matrix. When the cooling rate is slow (furnace cooling), there will precipitate a small amount of second phases, which are small in size (<5 nm) and contain relatively few Cu atoms (3.7%). As for 2.0Cu alloy, with decreasing cooling rate (from water cooling to air cooling, and to furnace cooling) there will firstly precipitate a small amount of second phase with small size (<5 nm); subsequently, the particles grow into a spherical shape (10 similar to 15 nm) and their number increases; at last, the particles transform into round bar with coarse size of 100 similar to 400 nm and the precipitate number decreases obviously. The Cu content of the latter two precipitates increased obviously (about 30%similar to 40%). These precipitates will significantly increase the average internal stress of the experimental FeCrMoCu alloy, which will obviously decrease the damping capacity. Therefore, the damping capacity of 2.0Cu alloy is much lower than that of 1.0Cu alloy. Meanwhile, the precipitate will obviously improve the strength. Compared with coarsen Cu-riched phase, the finer second phase has better hardening effect and its influence on ductility and toughness is relatively small. The FeCrMoCu alloy with addition of 1.0% Cu can obtain better damping capacity and mechanical properties at the same time.
关键词	FeCrMoCu alloy Cu cooling rate precipitate damping capacity
资助者	National Natural Science Foundation of China
DOI	10.11900/0412.1961.2016.00504
收录类别	SCI
语种	英语
资助项目	National Natural Science Foundation of China[51301170]
WOS研究方向	Metallurgy & Metallurgical Engineering
WOS类目	Metallurgy & Metallurgical Engineering
WOS记录号	WOS:000399922300011
出版者	SCIENCE PRESS
引用统计	被引频次：2[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/321006/124607
专题	中国科学院金属研究所
通讯作者	Hu Xiaofeng
作者单位	1.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China 2.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Hu Xiaofeng,Du Yubin,Yan Desheng,et al. Cu Precipitation and Its Effect on Damping Capacity and Mechanical Properties of FeCrMoCu Alloy[J]. ACTA METALLURGICA SINICA,2017,53(5):601-608.
APA	Hu Xiaofeng,Du Yubin,Yan Desheng,&Rong Lijian.(2017).Cu Precipitation and Its Effect on Damping Capacity and Mechanical Properties of FeCrMoCu Alloy.ACTA METALLURGICA SINICA,53(5),601-608.
MLA	Hu Xiaofeng,et al."Cu Precipitation and Its Effect on Damping Capacity and Mechanical Properties of FeCrMoCu Alloy".ACTA METALLURGICA SINICA 53.5(2017):601-608.