Texture evolution behavior and anisotropy of 2A97 Al–Li alloy during recrystallization at elevated temperature

Wang, Dong; Gao, Chong; Luo, Hongyun; Yang, Ying; Ma, Yuanyuan

doi:10.1007/s12598-018-0997-y

Cited by 15 publications

(7 citation statements)

References 35 publications

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“…Although the PSN mechanism can help accumulate deformation energy and promote recrystallization, the overall reduction in dislocation density in the alloy makes it difficult to reach the critical value for recrystallization. Therefore, only a portion of the second-phase particles in the cross-rolled alloy induce recrystallization, resulting in a reduced number of recrystallized grains compared to normal rolling [31][32][33].…”

Section: Mechanical Properties During Rolling With Different Reductionsmentioning

confidence: 99%

Microstructure and Anisotropy of Mechanical Properties of Al-3Li-1Cu-0.4Mg-0.1Er-0.1Zr Alloys Prepared by Normal Rolling and Cross-Rolling

Ma,

Zhong,

Sun

et al. 2023

Metals

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The influence of normal rolling and cross-rolling on the microstructure, mechanical properties, and anisotropy of Al-3Li-1Cu-0.4Mg-0.1Er-0.1Zr alloy was investigated. With an increase in the rolling reduction amount, both the strength and plasticity of the alloy are enhanced. Among them, the alloy in the normal rolling state with a deformation amount of 90% exhibits the best properties, with a tensile strength of 362 MPa and an elongation of 19.1% along the rolling direction. During the rolling process, the intergranular Cu-containing phase in the alloy is continuously broken and dissolved, leading to a decrease in both size and quantity, turning from continuous distribution along grain boundaries to a granular distribution. Moreover, a large quantity of the Al3Li phase and Al3(Er, Zr, Li) core–shell composite phase are precipitated in the alloy. Recrystallization occurs mainly through the particle stimulated nucleation (PSN) mechanism. Cross-rolling eliminates the brass-type texture <111> produced by normal rolling and enhances the brass R-type texture {111}<112>. The index of plane anisotropy (IPA) of the strength decreases from 10.1% for normal rolling to 5.5% for cross-rolling, and the IPA of elongation decreases from 12.8% to 3.3%. Cross-rolling provides an effective method to reduce the anisotropy of Al-Li alloys.

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Section: Mechanical Properties During Rolling With Different Reductionsmentioning

confidence: 99%

Microstructure and Anisotropy of Mechanical Properties of Al-3Li-1Cu-0.4Mg-0.1Er-0.1Zr Alloys Prepared by Normal Rolling and Cross-Rolling

Ma,

Zhong,

Sun

et al. 2023

Metals

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“…The partial shear band is formed in severe deformation area, Figure 5a. The formation of adiabatic shear bands indicates a decrease or loss of material carrying capacity, as microcracks may be associated with the strip-shaped adiabatic shear bands [30,31]. The adiabatic shear band is a typical instability phenomenon in metal materials, which usually occurs under the condition of high strain rate deformation.…”

Section: Microstructural Evolutionmentioning

confidence: 99%

High temperature flow behavior and constitutive model of alloy transition layer in composite steel tube prepared by centrifugal self‐propagating high‐temperature synthesis (SHS)

Wang

Liang²,

Wei³

et al. 2020

Materialwissenschaft Werkst

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Centrifugal self-propagation high-temperature synthesis (SHS) is a newly developed composite preparation technique by which a ceramic-alloy-carbon steel multilayer composite tube can be prepared. The hot deformation behaviors of the alloy steel layer at 800°C-1000°C, strain rates of 0.01 s À 1 , 0.1 s À 1 , 1.0 s À 1 and 10 s À 1 were studied by Gleeble-1500 thermal simulator. Rheological curve characteristics were analyzed under different thermal compression processes and a phenomenological hyperbolic sinusoidal Arrhenius constitutive equation was established to characterize the rheological mechanics of the material. The results show that the alloy steel is sensitive to temperature and strain rate, and its value of true stress decreases with the increase of temperature and strain rate. Thermal deformation process is the interaction between work hardening and dynamic softening, which is accompanied by the increase and extinction of dislocations. Under the strain rate of 10 s À 1 , the stress-strain curve has a significant decrease when the strain exceeds 0.5. According to the observation of microstructure, this phenomenon can be attributed to the micro-crack generated by the local instability flow in the denatured zone. With the strain rate decreases, the softening mechanism of the alloy changes from dynamic recovery to dynamic recrystallization. The calculation results of the Arrhenius constitutive equation (AARE = 6.54 %, R = 0.99452) indicate that the model can predict the flow stress of the alloy accurately.

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“…Therefore, some researchers have carried out studies on the anisotropy of Al–Li alloy sheets to analyze the influence of different process parameters on its anisotropy and the related microstructural mechanism. Wang et al [ 15 ] studied the precipitation and texture-forming mechanism of the 2A97 (Al–Cu–Li) Al–Li alloy, and the influence of the precipitation and texture on the anisotropy was also analyzed. El-Aty et al [ 16 ] investigated the influence of specimen orientation and the strain rate on the tensile performances and anisotropy mechanism of 1460, 8090 (Al–Li–Cu–Mg), and 2060 (Al–Cu–Li) Al–Li alloy sheets through dynamic and quasistatic tensile tests.…”

Section: Introductionmentioning

confidence: 99%

Effect of Initial Orientation on the Anisotropy in Microstructure and Mechanical Properties of 2195 Al–Li Alloy Sheet during Hot Tensile Deformation

Ning

Liang

et al. 2023

Materials

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The 2195 Al–Li alloy, as one of the representative third-generation Al–Li alloys, has extensive applications in lightweight aerospace structures. In this paper, the anisotropy in mechanical properties and microstructure evolution of 2195 Al–Li alloy sheets were investigated under a strain rate of 0.01, 0.1, 1 s−1 and a temperature of 440 and 500 °C. Experimental results showed that the hot tensile properties of the 2195 Al–Li alloy sheet exhibited a strong dependence on loading directions. The peak stress (PS) and elongation (EL) along the rolling direction (RD) were larger than the transverse direction (TD). For the tests carried out at 440 °C-1 s−1, the PS values of the sheets stretched along the RD and TD are 142.9 MPa and 110.2 MPa, respectively. And, most of the PS anisotropy values are larger than 15%. The anisotropy in EL is less significant than in PS. All the differences are about 10%. Moreover, dimples in the samples stretched along RD were more and deeper than those along TD at 440 °C. The fracture morphology along RD and TD were similar, and both were cleavage fractures at 500 °C. Particularly, the fractions of high angle grain boundaries (HAGBs) along TD were all about 5% larger than those of RD. And, there were more small-sized continuous dynamic recrystallization (CDRX) grains inside the initial grains and discontinuous dynamic recrystallization (DDRX) grains featured with the local bulge of grain boundaries along TD. This was due to the smaller average Schmid factor and the vertical EL trend of the initial grains when the samples were stretched along TD. A model of grain evolution during the dynamic recrystallization (DRX) along RD and TD was proposed based on EBSD results. The Schmid factor and banded structure had a more prominent effect on the hot ductility of the 2195 Al–Li alloy compared with the degree of DRX, thus presenting a higher EL and better hot ductility along RD.

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Texture evolution behavior and anisotropy of 2A97 Al–Li alloy during recrystallization at elevated temperature

Cited by 15 publications

References 35 publications

Microstructure and Anisotropy of Mechanical Properties of Al-3Li-1Cu-0.4Mg-0.1Er-0.1Zr Alloys Prepared by Normal Rolling and Cross-Rolling

Microstructure and Anisotropy of Mechanical Properties of Al-3Li-1Cu-0.4Mg-0.1Er-0.1Zr Alloys Prepared by Normal Rolling and Cross-Rolling

High temperature flow behavior and constitutive model of alloy transition layer in composite steel tube prepared by centrifugal self‐propagating high‐temperature synthesis (SHS)

Effect of Initial Orientation on the Anisotropy in Microstructure and Mechanical Properties of 2195 Al–Li Alloy Sheet during Hot Tensile Deformation

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