Effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy

Duan, Shuwei; Guo, Fuqiang; Zhang, Yongang; Chong, Kai; Lee, Seungwon; Matsuda, Kenji; Zou, Yong

doi:10.1016/j.matdes.2021.110216

Cited by 21 publications

(7 citation statements)

References 61 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The hardness of the Mg alloys was very low compared to the Al alloys [2,[29][30][31]. It is obvious that the hardness controlled the DOP, while the high mechanical strength and high elongation absorbed the stress-energy carried by the projectile.…”

Section: Introductionmentioning

confidence: 96%

A Prospective Way to Achieve Ballistic Impact Resistance of Lightweight Magnesium Alloys

Malik

Nazeer

Wang

2022

Metals

View full text Add to dashboard Cite

The ballistic impact resistance of lightweight magnesium alloys is an eye-catching material for the military and aerospace industries, which can decrease the cost of a project and the fuel consumption. The shockwave mitigation ability of a magnesium alloy is 100 times stronger than an aluminum alloy; nonetheless, ballistic impact resistance has still not been achieved against blunt and API projectiles. The major obstacles are the low hardness, low mechanical strength, basal texture and strain hardening ability under loading along the normal direction of the sheet. The high yield strength and ultimate strength can be achieved for a specific loading condition (tensile or compression) by adjusting the texture in magnesium alloys. The projectile impact along the normal direction in a strong basal-textured magnesium alloy can only produce a slip-induced deformation or minor twinning activity. Here, we propose a practical technique that can be valuable for altering the texture from c-axes//ND to c-axes//ED or TD, and can produce high strain hardening and high strength through a twinning and de-twinning activity. Subsequently, it can improve the ballistic impact resistance of magnesium alloys. The effect of the technique on the evolution of the microstructure and possible anticipated deformation mechanisms after ballistic impact is proposed and discussed.

show abstract

Section: Introductionmentioning

confidence: 96%

A Prospective Way to Achieve Ballistic Impact Resistance of Lightweight Magnesium Alloys

Malik

Nazeer

Wang

2022

Metals

View full text Add to dashboard Cite

show abstract

“…This effect is typical for T6-treated materials [8,9,69] and generally should be suppressed by a small calibration pre-straining (3-10%) at room temperature before the age-hardening. This treatment (T8 temper) significantly accelerates the kinetics of age-hardening and increases the density of fine precipitates (θ -Al 2 Cu, T 1 -Al 2 CuLi) heterogeneously nucleating on dislocations [37,[70][71][72]. Therefore, the peak-aged values are accessed at shorter annealing times (Figure 13).…”

Section: Discussionmentioning

confidence: 99%

Near Net Shape Manufacturing of Sheets from Al-Cu-Li-Mg-Sc-Zr Alloy

Kihoulou,

Králík,

Bajtošová

et al. 2024

Materials

View full text Add to dashboard Cite

Thin twin-roll cast strips from a model Al-Cu-Mg-Li-Zr alloy with a small addition of Sc were prepared. A combination of a fast solidification rate and a favorable effect of Sc microalloying refines the grain size and the size of primary phase particles and reduces eutectic cell dimensions to 10–15 μm. Long-term homogenization annealings used in conventionally cast materials lasting several tens of hours followed by a necessary dimension reduction through rolling/extruding could be substituted by energy and material-saving procedure. It consists of two-step short annealings at 300 °C/30 min and 450 °C/30 min, followed by the refinement and hardening of the structure using constrained groove pressing. A dense dispersion of 10–20 nm spherical Al3(Sc,Zr) precipitates intensively forms during this treatment and effectively stabilizes the structure and inhibits the grain growth during subsequent solution treatment at 530 °C/30 min. Small (3%) pre-straining after quenching assures more uniform precipitation of strengthening Al2Cu (θ′), Al2CuMg (S′), and Al2CuLi (T1) particles during subsequent age-hardening annealing at 180 °C/14 h. The material does not contain a directional and anisotropic structure unavoidable in rolled or extruded sheets. The proposed procedure thus represents a model near net shape processing strategy for manufacturing lightweight high-strength sheets for cryogenic applications in aeronautics.

show abstract

“…PSN produces many recrystallized grains, which weakens the deformation texture [16]. However, it is interesting to note that the brass component, while showing the same decreasing trend as other texture components, was reduced to a lesser extent as the SEF proceeds (7% reduction in the second pass).…”

Section: Textures Evolution During Sef Processmentioning

confidence: 94%

“…There have been numerous studies on controlling the deformation texture, mostly via the careful tunning of the secondary-phase and recrystallization behavior of the material [16][17][18][19][20]. It is known that secondary-phase particles are rich in Al-Li alloys and vary greatly in terms of their shape, size, and distribution, this significantly affects slipping behavior of dislocations during plastic deformation, resulting in different textures.…”

Section: Introductionmentioning

confidence: 99%

The Correlation between Texture Evolution and Recrystallization Behavior during Rheologic Forming of 2195 Al–Li Alloy Cylindric Shell

Wang

Xiong

Zheng

et al. 2023

Metals

View full text Add to dashboard Cite

Spinning extrusion forming (SEF) is a type of rheologic forming process for making complex structured aerospace components, such as ribbed cylindric shells. However, our understanding of the texture evolution and recrystallization behavior during the SEF process is still limited, especially in complex system like the 2195 Al–Li alloy, which is considered to be the ideal material candidate for aerospace vehicles because of its low density and high specific strength. In this study, we investigate the microstructural evolution of a 2195 Al–Li alloy-made cylindric shell component during SEF and subsequent solution treatment and discuss the recrystallization mechanism and its influence on the texture. It is found that particle-stimulated nucleation (PSN) occurs during the SEF process due to a large number of Al2Cu particles, which is responsible for the obvious reduction of texture components during SEF. Additionally, we show that the continuous dynamic recrystallization is responsible for the increased grains with {110} orientation, resulting in relatively stable brass texture components, even in the subsequent solution treatment.

show abstract

Effects of texture and precipitates characteristics on anisotropic hardness evolution during artificial aging for an Al–Cu–Li alloy

Cited by 21 publications

References 61 publications

A Prospective Way to Achieve Ballistic Impact Resistance of Lightweight Magnesium Alloys

A Prospective Way to Achieve Ballistic Impact Resistance of Lightweight Magnesium Alloys

Near Net Shape Manufacturing of Sheets from Al-Cu-Li-Mg-Sc-Zr Alloy

The Correlation between Texture Evolution and Recrystallization Behavior during Rheologic Forming of 2195 Al–Li Alloy Cylindric Shell

Contact Info

Product

Resources

About