Effects of solution treatment on microstructural and mechanical properties of Al–Zn–Mg alloy by microalloying with Sc and Zr

Li, Bo; Pan, Qing‐Jiang; Chen, Congping; Wu, Haihua; Yin, Zhi-min

doi:10.1016/j.jallcom.2016.01.016

Cited by 66 publications

(25 citation statements)

References 41 publications

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“…For AlZnMg alloys, the typical precipitate sequence is a fi GP fi g¢-MgZn 2 fi g-MgZn 2 . [12,14,27,35] Based on the brightfield TEM images shown in Figure 13, high-density short rod-shaped fine precipitates ranging in the size from 5 to 10 nm are observed in the microstructure, which has been confirmed to be the g¢-MgZn 2 phase. [27] C. Mechanical Properties of the Al-Mg-Si-Zn Alloys…”

Section: Resultsmentioning

confidence: 99%

“…Table IV summarizes the precipitates observed in Al-Mg-Znbased alloys. [12][13][14]27,31,32,34,35] g-Type precipitates are observed in alloys with magnesium concentration below 2.5 wt pct, while s-Mg 32 (Al, Zn) 49 phases are observed for relatively high magnesium concentration. A numerical model has also been established to prove that the s phase exists with the increasing Mg content in Al-6 wt pct Zn-2 wt pct Cu-(1 to 4) wt pct Mg alloys.…”

Section: Resultsmentioning

confidence: 99%

“…[12,14,16,20] The strength of the T6 temper is significantly affected by the zinc concentration. Both the yield strength and UTS decrease with the decreasing zinc content.…”

Section: Resultsmentioning

confidence: 99%

“…[12] Yang et al [13] investigated an Al-Zn-Mg alloy with a Mg-to-Zn atomic ratio of 0.34 to improve the strength through formation of the coherent polyhedral s-phase [(Al, Zn) 49 Mg 32 ]. Li et al [14] investigated solution treatment of the microalloyed Al-Zn-Mg alloy system with Sc and Zr and found that both g¢-MgZn 2 precipitates and fine Al 3 (Sc, Zr) particles are homogenously distributed throughout the a-Al grains under heat-treatment conditions. This alloy has a yield strength of 560 MPa, an UTS of 580 MPa, and an elongation of 10 pct.…”

Section: Introductionmentioning

confidence: 99%

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Effect of Zn Concentration on the Microstructure and Mechanical Properties of Al-Mg-Si-Zn Alloys Processed by Gravity Die Casting

Zhu

et al. 2018

Metall Mater Trans A

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The microstructure and mechanical properties of Al-8.1Mg-2.6Si-(0.08 to 4.62)Zn alloys (in wt pct) have been investigated by the permanent mold casting process. X-ray diffraction analysis shows that the s-Mg 32 (Al, Zn) 49 phase forms when the Zn content is 1.01 wt pct. With higher Zn contents of 2.37 and 3.59 wt pct, the g-MgZn 2 and s-Mg 32 (Al, Zn) 49 phases precipitate in the microstructure, and the g-MgZn 2 phase forms when the Zn content is 4.62 wt pct. Metallurgical analysis shows that the g-MgZn 2 and s-Mg 32 (Al, Zn) 49 phases strengthen the Al-8.1Mg-2.6Si-(0.08 to 4.62)Zn alloys. After solutionizing at 510°C for 180 minutes and aging at 180°C for 90 minutes, the g¢-MgZn 2 phase precipitates in the a-Al matrix, which significantly enhances the mechanical properties. Addition of 3.59 wt pct Zn to the Al-8.1Mg-2.6Si alloy with heat treatment increases the yield strength from 96 to 280 MPa, increases the ultimate tensile strength from 267 to 310 MPa, and decreases the elongation from 9.97 to 1.74 pct.

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Section: Resultsmentioning

confidence: 99%

Section: Resultsmentioning

confidence: 99%

“…[12,14,16,20] The strength of the T6 temper is significantly affected by the zinc concentration. Both the yield strength and UTS decrease with the decreasing zinc content.…”

Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Zn Concentration on the Microstructure and Mechanical Properties of Al-Mg-Si-Zn Alloys Processed by Gravity Die Casting

Zhu

et al. 2018

Metall Mater Trans A

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“…Due to these desirable properties, AMCs are widely applied as structural materials in many industries, such as automobiles, aerospace, as well as drill pipe material used in extra-deep oil drilling [3][4][5][6]. Among aluminum alloys, 7000-series aluminum alloys possess the highest strength-to-weight ratio, which makes them an attractive candidate for reinforcement by a second phase to further improve their properties [7][8][9].…”

Section: Introductionmentioning

confidence: 99%

Reduced Graphene Oxide Reinforced 7075 Al Matrix Composites: Powder Synthesis and Mechanical Properties

Sun

Zhang

Лиу

et al. 2017

Metals

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Abstract:Reduced graphene oxide (rGO) reinforced 7075 Al matrix composites were fabricated by electrostatic self-assembly and powder metallurgy. 7075 Al powders were surface modified by introducing a cetyl trimethyl ammonium bromide (CTAB) membrane on the surface, which was able to form a strong bonding with graphene oxide (GO) through electrostatic interaction. During the vacuum sintering process, CTAB was effectively removed and GO was thermally reduced into rGO. Morphologies of GO nanosheets, GO/7075 Al powders, microstructures, and tensile fractographs of the composites were observed. The effect of rGO content on mechanical properties of rGO/7075 Al composites was investigated. The results show that a good bonding between rGO and matrix is achieved. With the rGO content increasing, the hardness increases gradually, while the ultimate tensile strength and yield strength initially increase and later decrease. The improvement in strength of rGO/7075 Al composites was attributed to stress transfer and dislocation strengthening. With rGO content reaching 0.50 wt %, the excessive addition of rGO gave rise to a weakening in the enhancement of the tensile properties due to the increasing amounts of brittle Al 4 C 3 and cracks.

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Effect of recrystallization and texture on mechanical properties of extruded AA7003 alloy

You

et al. 2019

Materialwissenschaft Werkst

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The microstructure, texture and mechanical properties of AA7003 extrusion sheets processed with different parameters were investigated. Furthermore, the effects of the microstructure and texture on the mechanical properties were discussed. The grain morphology and the texture were analyzed by using a combination of scanning electron microscopy and electron backscatter diffraction. Moreover, the mechanical properties were measured by tensile tests and the tensile fracture morphology was also analyzed by scanning electron microscopy. The results showed that the maximum recrystallization extent occurred at the extrusion process conditions of T = 450 °C and v = 1 mm/s, and the increase in recrystallization extent had a negative effect on the tensile strength. Moreover, a relatively strong recrystallization cube orientation <100> existed when the extrusion temperature was 470 °C, showing a high tensile strength and elongation. Thus, it can be concluded that the cube texture is beneficial to the tensile strength and elongation in extruded AA7003 alloy.

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Effects of solution treatment on microstructural and mechanical properties of Al–Zn–Mg alloy by microalloying with Sc and Zr

Cited by 66 publications

References 41 publications

Effect of Zn Concentration on the Microstructure and Mechanical Properties of Al-Mg-Si-Zn Alloys Processed by Gravity Die Casting

Effect of Zn Concentration on the Microstructure and Mechanical Properties of Al-Mg-Si-Zn Alloys Processed by Gravity Die Casting

Reduced Graphene Oxide Reinforced 7075 Al Matrix Composites: Powder Synthesis and Mechanical Properties

Effect of recrystallization and texture on mechanical properties of extruded AA7003 alloy

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