Transactions of Nonferrous Metals Society of China The Chinese Journal of Nonferrous Metals

您目前所在的位置:首页 - 期刊简介 - 详细页面

中国有色金属学报(英文版)

Transactions of Nonferrous Metals Society of China

Vol. 35    No. 9    September 2025

[PDF Download]        

    

Effects of dislocation loop on microstructure and mechanical properties of LN2-quenched 2524 Al alloy
Hui YU1, Li-ping TIAN1, Li-wei QUAN1, Chao LIU1, Li-xin HUANG2, Yu-ling XU3, Wei YU4, Bin-an JIANG5, Kwang-seon SHIN6

1. Tianjin Key Laboratory of Materials Laminating Fabrication and Interfacial Controlling Technology, School of Materials Science and Engineering, Hebei University of Technology, Tianjin 300130, China;
2. Guangzhou Huitian Intelligence Technology Co., Ltd., Guangzhou 511400, China;
3. Baomarc (Hefei) Technology Co., Ltd., Hefei 238000, China;
4. School of Materials Science and Engineering, Hefei University of Technology, Hefei 230009, China;
5. PLA AAAAD, Hefei 230031, China;
6. Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea

Abstract:The microstructure and mechanical properties of 2524 Al alloy after quenching in liquid nitrogen (LN2) were investigated by TEM and compared with those of cold water quenching. The results show that the LN2 quenching process effectively induces the formation of dislocation loops. These loops become large and unevenly distribute after aging for 15 min. Furthermore, such loops become rapidly immobilized by the precipitation of coarse S phases after 1 h aging. The alloy quenched in LN2 demonstrates superior peak hardness and displays a more rapid response to subsequent aging treatments compared with the cold water-quenched one. Despite the short aging time, LN2-quenched sample achieves tensile strength of 488 MPa. This enhanced strength is attributed to the strengthening effect of numerous finely dispersed Guinier-Preston-Bagaryatsky (GPB) zones, in conjunction with the inhomogeneous formation of S phase on the dislocation loops.

 

Key words: 2524 Al alloy; LN2 quenching; dislocation loop; GPB zone; S phase

ISSN 1004-0609
CN 43-1238/TG
CODEN: ZYJXFK

ISSN 1003-6326
CN 43-1239/TG
CODEN: TNMCEW

主管:中国科学技术协会 主办:中国有色金属学会 承办:中南大学
湘ICP备09001153号 版权所有:《中国有色金属学报》编辑部
------------------------------------------------------------------------------------------
地 址:湖南省长沙市岳麓山中南大学内 邮编:410083
电 话:0731-88876765,88877197,88830410   传真:0731-88877197   电子邮箱:f_ysxb@163.com