IHEP OpenIR  > 多学科研究中心
Length-scale dependent microalloying effects on precipitation behaviors and mechanical properties of Al-Cu alloys with minor Sc addition
Jiang, L; Li, JK; Liu, G; Wang, RH; Chen, BA; Zhang, JY; Sun, J; Yang, MX; Yang, G; Yang, J; Cao, XZ; Yang J(杨静); Cao XZ(曹兴忠)
2015
发表期刊MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING
卷号637页码:139-154
文章类型Article
摘要Heat-treatable Al alloys containing Al-2.5 wt% Cu (Al-Cu) and Al-2.5 wt% Cu-0.3 wt% Sc (Al-Cu-Sc) with different grain length scales, i.e., average grain size > 10 mu m ( defined coarse grained, CG), 1-2 mu m (fine grained, FG), and <1 mu m (ultrafine grained, UFG), were prepared by equal-channel angular pressing (ECAP). The length scale and Sc microalloying effects and their interplay on the precipitation behavior and mechanical properties of the Al-Cu alloys were systematically investigated. In the Al-Cu alloys, intergranular theta-Al2Cu precipitation gradually dominated by sacrificing the intragranular theta'-Al2Cu precipitation with reducing the length scale. Especially in the UFG regime, only intergranular theta-Al2Cu particles were precipitated and intragranular theta'-Al2Cu precipitation was completely disappeared. This led to a remarkable reduction in yield strength and ductility due to insufficient dislocation storage capacity. The minor Sc addition resulted in a microalloying effect in the Al-Cu alloy, which, however, is strongly dependent on the length scale. The smaller is the grain size, the more active is the microalloying effect that promotes the intragranular precipitation while reduces the intergranular precipitation. Correspondingly, compared with their Sc-free counterparts, the yield strength of post-aged CG, FG, and UFG Al-Cu alloys with Sc addition increased by similar to 36 MPa, similar to 56 MPa, and similar to 150 MPa, simultaneously in tensile elongation by similar to 20%, similar to 30%, and similar to 280%, respectively. The grain size-induced evolutions in vacancy concentration/distribution and number density of vacancy-solute/solute-solute clusters and their influences on precipitation nucleation and kinetics have been comprehensively considered to rationalize the length scale-dependent Sc microalloying mechanisms using positron annihilation lifetime spectrum and three dimension atom probe. The increase in ductility was analyzed in the light of Sc microalloying effect and the strength contributions by different strengthening mechanisms was quantified as well. (C) 2015 Elsevier B.V. All rights reserved.
关键词Al-Cu alloy Microalloying effect Precipitation behavior Mechanical properties Length scale-dependence
学科领域Science & Technology - Other Topics; Materials Science; Metallurgy & Metallurgical Engineering
DOI10.1016/j.msea.2015.04.035
收录类别SCI ; EI
WOS类目Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary ; Metallurgy & Metallurgical Engineering
WOS记录号WOS:000356207600017
引用统计
被引频次:10[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ihep.ac.cn/handle/311005/228430
专题多学科研究中心
推荐引用方式
GB/T 7714
Jiang, L,Li, JK,Liu, G,et al. Length-scale dependent microalloying effects on precipitation behaviors and mechanical properties of Al-Cu alloys with minor Sc addition[J]. MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,2015,637:139-154.
APA Jiang, L.,Li, JK.,Liu, G.,Wang, RH.,Chen, BA.,...&曹兴忠.(2015).Length-scale dependent microalloying effects on precipitation behaviors and mechanical properties of Al-Cu alloys with minor Sc addition.MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING,637,139-154.
MLA Jiang, L,et al."Length-scale dependent microalloying effects on precipitation behaviors and mechanical properties of Al-Cu alloys with minor Sc addition".MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING 637(2015):139-154.
条目包含的文件
文件名称/大小 文献类型 版本类型 开放类型 使用许可
366.pdf(9989KB)期刊论文作者接受稿限制开放CC BY-NC-SA请求全文
个性服务
推荐该条目
保存到收藏夹
查看访问统计
导出为Endnote文件
谷歌学术
谷歌学术中相似的文章
[Jiang, L]的文章
[Li, JK]的文章
[Liu, G]的文章
百度学术
百度学术中相似的文章
[Jiang, L]的文章
[Li, JK]的文章
[Liu, G]的文章
必应学术
必应学术中相似的文章
[Jiang, L]的文章
[Li, JK]的文章
[Liu, G]的文章
相关权益政策
暂无数据
收藏/分享
所有评论 (0)
暂无评论
 

除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。