Evolution of discontinuous/continuous Al3(Sc,Zr) precipitation in Al-Mg-Mn 5083 alloy during thermomechanical process and its impact on tensile properties

被引：26

作者：

Algendy, Ahmed Y. ^{[1
]}

Liu, Kun ^{[1
]}

Rometsch, Paul ^{[2
]}

Parson, Nick ^{[2
]}

Chen, Grant ^{[1
]}

机构：

[1] Univ Quebec Chicoutimi, Dept Appl Sci, Saguenay, PQ G7H 2B1, Canada

[2] Arvida Res & Dev Ctr, Rio Tinto Aluminum, Saguenay, PQ G7S 4K8, Canada

来源：

MATERIALS CHARACTERIZATION | 2022年 / 192卷

基金：

加拿大自然科学与工程研究理事会;

关键词：

Al-Mg-Mn; 5083; alloy; Discontinuous Al 3 (Sc; Zr) precipitation; Sc and Zr addition; Microstructure; Mechanical properties; MECHANICAL-PROPERTIES; PHASE PRECIPITATION; ZR; SC; MICROSTRUCTURE; BEHAVIOR; SCANDIUM; KINETICS; AMBIENT;

D O I：

10.1016/j.matchar.2022.112241

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

The evolution of discontinuous and continuous Al3(Sc,Zr) precipitation in an Al-Mg-Mn AA5083 alloy during heat treatment and hot rolling was investigated. The results showed that, at a high Sc content (0.43 wt%), a large number of line/fan-shaped structures were formed as discontinuous Al3(Sc,Zr) precipitation during solidification, while no such discontinuous precipitation was observed when the amount of Sc added was low (0.15 wt%). During the three-step heat treatment (275 C /12 h + 375 C/48 h + 425 C/12 h), two types of precipitates - Mn-bearing dispersoids and spherical Al3(Sc,Zr) precipitates - were formed as the main strengthening phases. In the high-Sc alloy, the discontinuous Al3(Sc,Zr) precipitates dissolved partially. However, the quantity of the spherical Al3(Sc,Zr) precipitates in the high-Sc alloy was much lower than that in the low-Sc alloy, which degraded its aging hardening response. During hot rolling, although the discontinuous precipitates were completely dissolved, the number density of the spherical Al3(Sc,Zr) precipitates in the high-Sc alloy was still lower than that in the low-Sc alloy. The tensile properties of the Sc-containing alloys improved significantly compared with those of the base alloy. However, the yield and ultimate tensile strengths of the high-Sc alloy were lower than those of the low-Sc alloy. This indicates that the discontinuous precipitation had a deleterious effect on the mechanical properties of the alloy.

引用

页数：10

共 39 条

[1] Evolution of dispersoids during multistep heat treatments and their effect on rolling performance in an Al-5% Mg-0.8% Mn alloy [J].

Algendy, Ahmed Y. ;

Liu, Kun ;

Chen, X. Grant .

MATERIALS CHARACTERIZATION, 2021, 181

[2] FOIL THICKNESS MEASUREMENTS FROM CONVERGENT-BEAM DIFFRACTION PATTERNS [J].

ALLEN, SM .

PHILOSOPHICAL MAGAZINE A-PHYSICS OF CONDENSED MATTER STRUCTURE DEFECTS AND MECHANICAL PROPERTIES, 1981, 43 (02) :325-335

[3] Precipitation behavior of strip cast Al-Mg-0.4Sc-0.15Zr alloy under single and multiple-stage aging processes [J].

Anijdan, S. H. Mousavi ;

Kang, D. ;

Singh, N. ;

Gallerneault, M. .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2015, 640 :275-279

[4] CONSTITUTION AND AGE HARDENING OF AL-SC ALLOYS [J].

BLAKE, N ;

HOPKINS, MA .

JOURNAL OF MATERIALS SCIENCE, 1985, 20 (08) :2861-2867

[5] Influence of severe plastic deformations on secondary phase precipitation in a 6082 Al-Mg-Si alloy [J].

Cabibbo, M ;

Evangelista, E ;

Vedani, M .

METALLURGICAL AND MATERIALS TRANSACTIONS A-PHYSICAL METALLURGY AND MATERIALS SCIENCE, 2005, 36A (05) :1353-1364

[6] Effect of solidification cooling rate on kinetics of continuous/discontinuous Al3(Sc,Zr) precipitation and the subsequent age-hardening response in cold-rolled AlMgSc(Zr) sheets [J].

Dong, Qingshan ;

Howells, Andrew ;

Lloyd, David J. ;

Gallerneault, Mark ;

Fallah, Vahid .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2020, 772

[7] Diffusion coefficients of some solutes in fcc and liquid Al: critical evaluation and correlation [J].

Du, Y ;

Chang, YA ;

Huang, BY ;

Gong, WP ;

Jin, ZP ;

Xu, HH ;

Yuan, ZH ;

Liu, Y ;

He, YH ;

Xie, FY .

MATERIALS SCIENCE AND ENGINEERING A-STRUCTURAL MATERIALS PROPERTIES MICROSTRUCTURE AND PROCESSING, 2003, 363 (1-2) :140-151

[8] Mechanical properties of Al(Sc,Zr) alloys at ambient and elevated temperatures [J].

Fuller, CB ;

Seidman, DN ;

Dunand, DC .

ACTA MATERIALIA, 2003, 51 (16) :4803-4814

[9] Temporal evolution of the nanostructure of AI(Sc,Zr) alloys:: Part I -: Chemical compositions of Al3(Sc1-xZrx) precipitatesy [J].

Fuller, CB ;

Murray, JL ;

Seidman, DN .

ACTA MATERIALIA, 2005, 53 (20) :5401-5413

[10] SYSTEMATICS OF CELLULAR PRECIPITATION REACTIONS [J].

HORNBOGEN, E .

METALLURGICAL TRANSACTIONS, 1972, 3 (11) :2717-+

← 1 2 3 4 →