Effect of Cu addition on precipitation and age-hardening response of an Al-15%Mg2 Si alloy

被引：22
|
作者：
Li, Mengran [1 ]
Sun, Yilin [1 ]
Li, Chong [1 ]
Dong, Ji [2 ]
Yu, Liming [1 ]
Liu, Yongchang [1 ]
机构：
[1] Tianjin Univ, Sch Mat Sci & Engn, State Key Lab Hydraul Engn Simulat & Safety, Tianjin 300354, Peoples R China
[2] Tianjin Sino German Univ Appl Sci, Sch Mech Engn, Tianjin 300350, Peoples R China
来源：
MATERIALS CHARACTERIZATION | 2020年 / 169卷
基金：
中国国家自然科学基金;
关键词：
Al-Mg2Si alloys; Microstructure; Precipitation; Cu addition; Heat treatment; Mechanical properties; MECHANICAL-PROPERTIES; TENSILE PROPERTIES; MICROSTRUCTURAL EVOLUTION; NANOCRYSTALLINE MG2SI; AL-MG2SI ALLOYS; WEAR BEHAVIOR; AL; PHASE; CAST; SB;
D O I：
10.1016/j.matchar.2020.110611
中图分类号：
T [工业技术];
学科分类号：
08 ;
摘要：
Microalloying of an Al-15%Mg2Si alloy (wt%) with 1%Cu produced an enhanced age-hardening response, increasing peak hardness and ultimate tensile strength due to a modified precipitation process. The solid solubility of Cu in Al-15%Mg2Si alloy effectively promotes the formation of the high number density of Guinier-PrestonBagaryasky (GPB) zones combined with S precipitates. It suppresses beta ' and beta '' formation during ageing at 200 degrees C. Consequently, Al-15%Mg2Si-1%Cu alloy with the high density of GPB zones and S phase exhibited high peak hardness (121 HVN) and ultimate tensile strength (284 MPa), 42.4% and 49.5% higher than that of the Al-15% Mg2Si alloy, respectively.
引用
收藏
页数：6
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