Precipitation behavior of Cu-NiAl nanoscale particles and their effect on mechanical properties in a high strength low alloy steel

doi:10.1016/j.matchar.2022.112014

CORC > 金属研究所 > 中国科学院金属研究所

	Precipitation behavior of Cu-NiAl nanoscale particles and their effect on mechanical properties in a high strength low alloy steel
	Du, Yubin 1,2; Hu, Xiaofeng 2; Zhang, Shouqing 1,2; Song, Yuanyuan 2; Jiang, Haichang 2; Rong, Lijian 2
刊名	MATERIALS CHARACTERIZATION
	2022-08-01
卷号	190 页码:10
关键词	High strength low alloy steel Precipitation behavior Cu-NiAl particles Tempering time Mechanical property
ISSN号	1044-5803
DOI	10.1016/j.matchar.2022.112014
通讯作者	Hu, Xiaofeng(xfhu@imr.ac.cn) ; Rong, Lijian(ljrong@imr.ac.cn)
英文摘要	The precipitation behavior of Cu-NiAl nanoscale particles in a high strength low alloy steel and their effect on mechanical properties are studied systemically by atom probe tomography and tensile testing. The results display that the Cu-rich zones will nucleate firstly from the supersaturated solid solution for the experimental high strength low alloy steel tempered at 500 ? for 0.08 h, which will transform into Cu-rich particles and also promote the heterogeneous nucleation of isolated NiAl particles. The precipitation sequence in the studied high strength low alloy steel can be expressed as: supersaturated solid solution -> Cu-rich zones -> Cu-rich particles + isolated NiAl -> Cu-NiAl + isolated NiAl. With increasing tempering time, the NiAl (Cu-NiAl + isolated NiAl) particles will coarsen continuously and the Cu-NiAl particles have larger radius and higher number density than the isolated NiAl particles. The tensile testing results reveal that NiAl particles exhibit strong precipitation strengthening and result in a strength plateau of about 1423-1486 MPa at 2-310 h. With tempering time increasing, the elongation decreases firstly and attains the minimum value of about 7.5% in the 5 h tempered condition due to the high number density (1.95 x 1024 m-3) of NiAl particles, and then the elongation increases gradually to 13.0% at 310 h. Obviously, the sample tempered for 310 h displays a beneficial combination of yield strength (1423 MPa) and elongation (13.0%).
资助项目	Liaoning Revitalization Talents Program[XLYC1907143] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDC04000000] ; Strategic Priority Research Program of the Chinese Academy of Sciences[XDA28040200] ; Liaoning Natural Science Foundation[2020-MS-008] ; Doctoral Start-up Project of Liaoning Province Natural Science Foundation[2020-BS-006]
WOS研究方向	Materials Science ; Metallurgy & Metallurgical Engineering
语种	英语
出版者	ELSEVIER SCIENCE INC
WOS记录号	WOS:000811310800003
资助机构	Liaoning Revitalization Talents Program ; Strategic Priority Research Program of the Chinese Academy of Sciences ; Liaoning Natural Science Foundation ; Doctoral Start-up Project of Liaoning Province Natural Science Foundation
内容类型	期刊论文
源URL	[http://ir.imr.ac.cn/handle/321006/174374]
专题	金属研究所_中国科学院金属研究所
通讯作者	Hu, Xiaofeng; Rong, Lijian
作者单位	1.Univ Sci & Technol China, Sch Mat Sci & Engn, Shenyang 110016, Peoples R China 2.Chinese Acad Sci, Inst Met Res, CAS Key Lab Nucl Mat & Safety Assessment, Shenyang 110016, Peoples R China
推荐引用方式 GB/T 7714	Du, Yubin,Hu, Xiaofeng,Zhang, Shouqing,et al. Precipitation behavior of Cu-NiAl nanoscale particles and their effect on mechanical properties in a high strength low alloy steel[J]. MATERIALS CHARACTERIZATION,2022,190:10.
APA	Du, Yubin,Hu, Xiaofeng,Zhang, Shouqing,Song, Yuanyuan,Jiang, Haichang,&Rong, Lijian.(2022).Precipitation behavior of Cu-NiAl nanoscale particles and their effect on mechanical properties in a high strength low alloy steel.MATERIALS CHARACTERIZATION,190,10.
MLA	Du, Yubin,et al."Precipitation behavior of Cu-NiAl nanoscale particles and their effect on mechanical properties in a high strength low alloy steel".MATERIALS CHARACTERIZATION 190(2022):10.