Effect of Zn addition on the precipitation behaviors of Al-Mg-Si-Cu alloys for automotive applications

被引：44

作者：

Guo, M. X. ^{[1
]}

Zhang, X. K. ^{[1
]}

Zhang, J. S. ^{[1
]}

Zhuang, L. Z. ^{[1
]}

机构：

[1] Univ Sci & Technol Beijing, State Key Lab Adv Met & Mat, Beijing 100083, Peoples R China

来源：

JOURNAL OF MATERIALS SCIENCE | 2017年 / 52卷 / 03期

基金：

中国国家自然科学基金;

关键词：

MECHANICAL-PROPERTIES; HARDENING BEHAVIOR; TEXTURE EVOLUTION; CRYSTAL-STRUCTURE; ALUMINUM-ALLOYS; KINETICS; MICROSTRUCTURE; SEQUENCE; PHASES; AA6111;

D O I：

10.1007/s10853-016-0433-3

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Effect of Zn addition on the precipitation kinetics and age-hardening response of Al-Mg-Si-Cu alloys was investigated by differential scanning calorimetry (DSC), hardness measurements, tensile tests and microstructural characterization. The results show that, compared with the Zn-free alloy, both the starting and peak temperatures in the DSC curve, and activation energy of beta aEuro(3) precipitation of Zn-added Al-Mg-Si-Cu alloy decrease significantly, corresponding to the greatly improved precipitation kinetics and age-hardening response, i.e., a hardness increment of 70HV after aging at 185 A degrees C for 20 min. Moreover, the peak hardness and tensile properties can also be greatly enhanced after adding 3.0 wt% Zn even exhibiting a ductile fracture feature in the peak-aged state. No precipitates of the Al-Zn-Mg alloy system appear in the Zn-added Al-Mg-Si-Cu alloys after aging at 185 A degrees C, and pre-beta aEuro(3), beta aEuro(3), and L precipitates are still the main precipitates in the two alloys after peak aging treatment. Finally, based on the microstructural evolution, a schematic diagram of precipitation in the Al-Mg-Si-Cu-Zn alloy is put forward, and the relationship between mechanical properties and microstructure is also established.

引用

页码：1390 / 1404

页数：15

共 45 条

[1] Influence of Si concentration on the precipitation in Al-1 at.% Mg alloy [J].

Afify, N. ;

Gaber, A. ;

Mostafa, M. S. ;

Abbady, Gh. .

JOURNAL OF ALLOYS AND COMPOUNDS, 2008, 462 (1-2) :80-87

[2] Investigation and characterization of the nanoscale precipitation sequence and their kinetics in Al-1.0% Mg2Si-0.4 wt% Si-0.5Cu (wt%) alloy [J].

Ali, Atif Mossad ;

Gaber, Abdel-Fattah ;

Matsuda, Kenji ;

Ikeno, Susumu .

MATERIALS CHEMISTRY AND PHYSICS, 2014, 147 (03) :461-468

[3] The crystal structure of the β" phase in Al-Mg-Si alloys [J].

Andersen, SJ ;

Zandbergen, HW ;

Jansen, J ;

Traeholt, C ;

Tundal, U ;

Reiso, O .

ACTA MATERIALIA, 1998, 46 (09) :3283-3298

[4] Precipitation kinetics of the hardening phase in two 6061 aluminium alloys [J].

Aouabdia, Youcef ;

Boubertakh, Abdelhamid ;

Hamamda, Smail .

MATERIALS LETTERS, 2010, 64 (03) :353-356

[5] Secondary precipitation in an Al-Mg-Si-Cu alloy [J].

Buha, J. ;

Lumley, R. N. ;

Crosky, A. G. ;

Hono, K. .

ACTA MATERIALIA, 2007, 55 (09) :3015-3024

[6] Microstructural characteristics and aging response of Zn-containing Al-Mg-Si-Cu alloy [J].

Cai, Yuan-hua ;

Wang, Cong ;

Zhang, Ji-shan .

INTERNATIONAL JOURNAL OF MINERALS METALLURGY AND MATERIALS, 2013, 20 (07) :659-664

[7] EFFECT OF SI EXCESS ON AGEING BEHAVIOUR OF AL-MG2SIO.8 PERCENT ALLOY [J].

CERESARA, S ;

DIRUSSO, E ;

FIORINI, P ;

GIARDA, A .

MATERIALS SCIENCE AND ENGINEERING, 1970, 5 (04) :220-&

[8] Characterization of the mechanical properties changes in an Al-Zn-Mg alloy after a two-step ageing treatment at 70° and 135 °C [J].

Chemingui, Mahmoud ;

Khitouni, Mohamed ;

Jozwiak, Karol ;

Mesmacque, Gerard ;

Kolsi, Abdelwaheb .

MATERIALS & DESIGN, 2010, 31 (06) :3134-3139

[9]

Cui L, 2015, ACTA METALL SIN, V51, P289

[10] Influence of predeformation on ageing in an Al-Zn-Mg alloy -: I.: Microstructure evolution and mechanical properties [J].

Deschamps, A ;

Livet, F ;

Bréchet, Y .

ACTA MATERIALIA, 1998, 47 (01) :281-292

← 1 2 3 4 5 →