文献类型：期刊文献

英文题名：The Effect of a Composite Nanostructure on the Mechanical Properties of a Novel Al-Cu-Mn Alloy through Multipass Cold Rolling and Aging

作者：Feng, Ke Yang, Ming Long, Shao-lei Li, Bo

第一作者：Feng, Ke

通信作者：Yang, M[1];Yang, M[2];Long, SL[2];Yang, M[3];Long, SL[3]

机构：[1]Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China;[2]Guizhou Elect Power Res Inst, Guiyang 550007, Peoples R China;[3]Guizhou Inst Technol, Coll Mat & Energy Engn, Guiyang 550003, Peoples R China;[4]High Performance Met Struct Mat & Manufacture Tec, Guiyang 550025, Peoples R China

第一机构：Guizhou Univ, Coll Mat & Met, Guiyang 550025, Peoples R China

通信机构：corresponding author), Guizhou Elect Power Res Inst, Guiyang 550007, Peoples R China;corresponding author), Guizhou Inst Technol, Coll Mat & Energy Engn, Guiyang 550003, Peoples R China;corresponding author), High Performance Met Struct Mat & Manufacture Tec, Guiyang 550025, Peoples R China.|贵州理工学院;

年份：2020

卷号：10

期号：22

起止页码：1-16

外文期刊名：APPLIED SCIENCES-BASEL

收录：;Scopus(收录号：2-s2.0-85096142598);WOS:【SCI-EXPANDED(收录号:WOS:000594186400001)】；

基金：This research was funded by the Engineering Research Center Project from the Department of Education of Guizhou Province (contract number [2017]016) and the Program Foundation for Talents of Guizhou University (grant number [2017]02).

语种：英文

外文关键词：novel Al-Cu-Mn alloy; ultrafine grains; microstructure; mechanical properties

摘要：An effective approach composed of solution treatment, multipass cold rolling and aging was developed to improve the strength and ductility of novel Al-Cu-Mn alloys. This approach increased the yield strength by 214 MPa over that of the conventional peak-aged samples while maintaining a good elongation of 8.7%. The microstructure evolution was examined by confocal laser scanning microscopy (CLSM), transmission electron microscopy (TEM) and X-ray diffraction (XRD). During postaging, deformed structures underwent a considerable decrease in dislocation density and typical dislocation network structures were formed. At the same time, highly dispersed nanoprecipitates and extensive ultrafine grains and nanograins were generated. These nanoprecipitations enabled effective dislocation pinning and accumulation during tension deformation. Therefore, composite nanostructures containing ultrafine grains, nanograins, dislocation network structures and nanoprecipitates were responsible for the simultaneous increases in strength and ductility. This paper provides a new understanding of designing composite nanostructure materials for achieving high strength and good ductility that is expected to be used for other age-hardenable alloys and steels.