Effect of strain-induced precipitation on the low angle grain boundary in AA7050 aluminum alloy

Lang, Yujing; Cai, Yanfei; Cui, Hua; Zhang, Jishan

doi:10.1016/j.matdes.2011.04.025

Cited by 82 publications

(15 citation statements)

References 28 publications

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“…The difference is maximum in yield strength. It has been mentioned that the most affected property due to presence of texture is yield strength but the results of the present study reflect that the other properties are also equally influenced [24].…”

Section: Discussionmentioning

confidence: 45%

“…This can again be attributed to temperature as well as strain gradient as mentioned above. It has been reported that the small dispersed particles in the matrix retard recrystallization rates through exerting a drag force on migrating grain or subgrain boundaries and preventing the nucleation of recrystallization [24]. This also explains the observation of less recrystallization at centre portion of the plate.…”

Section: Discussionmentioning

confidence: 95%

See 1 more Smart Citation

Microstructure, Texture, Mechanical and Ballistic Properties Correlation of a Hot Rolled and Peak Aged AA-7017 Alloy Plate at Surface and Centre

Jena¹,

Kumar²,

Mandal³

et al. 2017

MSA

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The present work describes microstructure, texture, mechanical and ballistic properties correlation of a hot rolled and peak aged AA-7017 alloy plate at surface and centre. Both the microstructures and textures are different on the surface and centre of the plate. The surface of the plate shows recrystallized grains and a weak over all texture. The centre of the plate displays elongated grains and a sharp texture. Tensile properties, hardness and impact toughness are evaluated at surface and centre of the plate. It is observed that strength and hardness is high at centre, whereas ductility and impact toughness is more at the surface. Ballistic properties of the plate at centre and surface are measured by impacting against two different 7.62 mm deformable projectiles. The plates impacted on the surface shows better ballistic resistance. Ballistic performance of the plate at surface and centre has been correlated with the microstructure, texture and mechanical properties.

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Section: Discussionmentioning

confidence: 45%

Section: Discussionmentioning

confidence: 95%

Microstructure, Texture, Mechanical and Ballistic Properties Correlation of a Hot Rolled and Peak Aged AA-7017 Alloy Plate at Surface and Centre

Jena¹,

Kumar²,

Mandal³

et al. 2017

MSA

View full text Add to dashboard Cite

show abstract

“…Considering the fact that the forged samples were heated to 400°C, this precipitate growth should be due to Ostwald ripening [29]. A similar behavior has been reported for hot deformed AA7050 alloy [30]. Additionally, Deschamps et al [31] explained that the warm deformation accelerates the coarsening of the precipitates due to the formation of additional vacancies as a result of the plastic flow, which thereby enhances the kinetics of diffusion.…”

Section: Spark Plasma Upsettingmentioning

confidence: 67%

Spark plasma sintering and spark plasma upsetting of an Al-Zn-Mg-Cu alloy

Tünçay

Bishop

Brochu

2017

Materials Science and Engineering: A

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Al-Zn-Mg-Cu alloy powder Alumix 431D was sintered at 400°C by spark plasma sintering (SPS) and upset forging was applied to the sintered sample through SPS. Densities of 99.1 ± 0.3% and 99.8 ± 0.1% of theoretical were obtained for the sintered and forged samples, respectively. T6 temper was carried out on the samples and microstructure analysis and mechanical properties before and after heat treatment were evaluated. Microhardness of 173 ± 3 and 172 ± 3 HV were attained in the T6 temper of as-sintered and forged samples, respectively. The flexural strength and strain values were significantly improved after the forging process, which can be mainly attributed to the better particle bonding in addition to the occurrence of some recrystallization. Significant loss in the ductility was observed after the T6 temper.

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“…Afterward, Bhargava and Dube [14] rewrote Eq. [1] and developed it. Then the relationship between the apparent plastic Poisson's ratio, c, and the relative density can be expressed based on the hot rolling of porous strip: …”

Section: Resultsmentioning

confidence: 99%

“…HIGH strength aluminum alloys such as AA7050 with good hardness, excellent corrosion resistance, and high toughness were used extensively for aerospace applications as stated by Lang et al [1] Generally speaking, flat or strip products are usually manufactured by conventional ingot metallurgy (I/M) process. Subsequently, the materials are further processed (e.g., heat treatment, hot rolling, cold rolling, etc.)…”

Section: Introductionmentioning

confidence: 99%

Semi-solid Powder Rolling of AA7050 Alloy Strips: Densification and Deformation Behaviors

Luo

Liu

et al. 2015

Metall Mater Trans A

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Semi-solid powder rolling (SSPR) is a novel strip manufacturing process which combines the features of semi-solid rolling and powder rolling. SSPR involves rolling procedure of metallic alloy powders when both liquid and solid phases coexist. In this study, densification process and deformation mechanisms of AA7050 powder in the presence of liquid phase were investigated. The relationships between the apparent plastic Poisson's ratio and the relative density as well as the thickness reduction ratio and relative density were calculated. The relationship between deformation strain and relative density was calculated as well. The experimental data of relationship between rolling forces and relative density were achieved. The results show that the densification process of SSPR also can be divided into three stages and liquid phase mainly affects stage I. In stage I, semi-solid particles' rearrangement and restacking are the main densification mechanisms when the initial liquid fraction is lower than 20 pct. When the initial liquid fraction is higher than 20 pct, flowing and filling of liquid, semi-solid particles rearrangement and restacking are the densification mechanisms. In stage II, severe deformation of particles associated with a rapid increase in the apparent plastic Poisson's ratio and interparticle contact area contributes to the densification process. In stage III, the densification mechanisms are the deformation and collapse of isolated pores. The calculated deformation strain increases gradually with the same slopes as the relative density increases in stages II and III no matter how much the liquid fraction is. Higher liquid needs less deformation degree that contributes to the densification.

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Effect of strain-induced precipitation on the low angle grain boundary in AA7050 aluminum alloy

Cited by 82 publications

References 28 publications

Microstructure, Texture, Mechanical and Ballistic Properties Correlation of a Hot Rolled and Peak Aged AA-7017 Alloy Plate at Surface and Centre

Microstructure, Texture, Mechanical and Ballistic Properties Correlation of a Hot Rolled and Peak Aged AA-7017 Alloy Plate at Surface and Centre

Spark plasma sintering and spark plasma upsetting of an Al-Zn-Mg-Cu alloy

Semi-solid Powder Rolling of AA7050 Alloy Strips: Densification and Deformation Behaviors

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