Microstructure evolution and mechanical responses of Al–Zn–Mg–Cu alloys during hot deformation process

Guo, Yue; Zhang, Jianhai; Zhao, Hongwei

doi:10.1007/s10853-021-06095-7

Cited by 30 publications

(15 citation statements)

References 250 publications

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“…The 7xxx series aluminum alloys precipitates were previously analyzed. [3][4][5][6][7][8][9] F I G U R E 1 SEM microphotographs of the 7049 aluminum alloy surface with IMCs. IMC, intermetallic compound; SEM, scanning electron microscope T A B L E 2 Results of EDS analysis of characteristic IMCs, wt% (Figure 1).…”

Section: Resultsmentioning

confidence: 99%

Analysis of the Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate as corrosion inhibitor of the aluminum alloys in NaCl solution

Radojković

Marunkić

Milošević

et al. 2022

Materials & Corrosion

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Green corrosion inhibitors, Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate, were tested in NaCl solution with the aim to evaluate their inhibitory effect on 7049 aluminum alloy and to propose a mechanism of their inhibitive action. Corrosion properties of the formed inhibitor layer were analyzed using electrochemical impedance spectroscopy, while the pit formation resistance was analyzed using potentiodynamic polarization tests. Morphology of the formed pits was evaluated by scanning electron microscope/energy‐dispersive spectroscopy analysis. It was shown that Ce(III) propionate in NaCl solution has a noticeably higher protective ability than Ce(III) chloride and Ce(III) nitrate. The presence of cerium, propionate anions, and Al–O bonds in the inhibitive layer on the 7049 aluminum alloy surface was confirmed by X‐ray photoelectron spectroscopy analysis. This indicates the formation of Ce propionate complexes and bonds via oxygen atoms from carboxylate anions with the metal surface. Density‐functional theory methods were used for the geometry optimization of possible Ce propionate complexes as corrosion inhibitors.

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Section: Resultsmentioning

confidence: 99%

Analysis of the Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate as corrosion inhibitor of the aluminum alloys in NaCl solution

Radojković

Marunkić

Milošević

et al. 2022

Materials & Corrosion

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“…However, post-necking strain to final fracture was gradually increased with the strain rate while flow stress beyond necking shows flow-softening behavior, regardless of strain rate. The continuous decrease in flow stress is caused by dynamic softening, which suggests that restoration is more dominant than work hardening related to dislocation generation/interaction [ 23 , 24 , 25 ]. Meanwhile, after necking emerges, flow stress under a high-strain-rate condition is higher than that in the static-loading condition, indicating DF-W under a higher strain rate undergoes a relatively weaker restoration process.…”

Section: Resultsmentioning

confidence: 99%

“…Previously, it was reported that a different type of DRX was observed in pure Mo [ 27 ], Mo-Ti-Zr (Mo-MZM) [ 23 , 28 ], and various metallic alloys [ 24 , 25 ] during hot deformation. When new grains free of strain are nucleated in a discontinuous manner at the cost of strained grain, this process is categorized as discontinuous DRX (DDRX).…”

Section: Resultsmentioning

confidence: 99%

“…When new grains free of strain are nucleated in a discontinuous manner at the cost of strained grain, this process is categorized as discontinuous DRX (DDRX). In some cases, sub-grain structure with LAGB is developed at lower strain via DRV and they would evolve into HAGB through progressive cumulative misorientation at further deformation [ 23 , 24 , 25 , 27 , 28 ]. This process corresponds to continuous DRX (CDRX).…”

Section: Resultsmentioning

confidence: 99%

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Strain-Rate Dependence of Tensile Behavior in Commercial-Grade Tungsten—Effect of Recrystallization Condition

Kong

Shin

et al. 2022

Materials

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The tensile deformation behavior of double-forged (DF-W) and recrystallized (RX-W) commercial-grade tungsten was investigated at 700 °C. With increasing strain rate, the dominant dynamic recrystallization (DRX) mechanism changes from continuous dynamic recrystallization (CDRX) to discontinuous dynamic recrystallization (DDRX). For DF-W, pre-existing sub-grains promote CDRX and associated a high-DRX fraction, resulting in reduced post-necking strain under a static condition. With increasing strain rate, a shift in the restoration mechanism from CDRX to DDRX contributes to the enhanced ductility in DF-W, while RX-W shows enhanced flow hardening without a loss of ductility. These results suggest that the strain-rate dependence of mechanical behavior depends on the initial microstructure.

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“…Hot processing methods are a better choice for obtaining uniform microstructure and excellent mechanical properties in Al-Zn-Mg-Cu alloys [ 19 ]. In recent years, the optimization of hot processing methods has been the focus of research, with particular attention to the influence of the hot deformation temperature and strain rate on flow stress and microstructure.…”

Section: Introductionmentioning

confidence: 99%

Hot Deformation Behavior and Microstructure Evolution of a Novel Al-Zn-Mg-Li-Cu Alloy

Zhu

Jiang

et al. 2022

Materials

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Lightweight structural alloys have broad application prospects in aerospace, energy, and transportation fields, and it is crucial to understand the hot deformation behavior of novel alloys for subsequent applications. The deformation behavior and microstructure evolution of a new Al-Zn-Mg-Li-Cu alloy was studied by hot compression experiments at temperatures ranging from 300 °C to 420 °C and strain rates ranging from 0.01 s−1 to 10 s−1. The as-cast Al-Zn-Mg-Li-Cu alloy is composed of an α-Al phase, an Al2Cu phase, a T phase, an η phase, and an η′ phase. The constitutive relationship between flow stress, temperature, and strain rate, represented by Zener–Hollomon parameters including Arrhenius terms, was established. Microstructure observations show that the grain size and the fraction of DRX increases with increasing deformation temperature. The grain size of DRX decreases with increasing strain rates, while the fraction of DRX first increases and then decreases. A certain amount of medium-angle grain boundaries (MAGBs) was present at both lower and higher deformation temperatures, suggesting the existence of continuous dynamic recrystallization (CDRX). The cumulative misorientation from intragranular to grain boundary proves that the CDRX mechanism of the alloy occurs through progressive subgrain rotation. This paper provides a basis for the deformation process of a new Al-Zn-Mg-Li-Cu alloy.

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Microstructure evolution and mechanical responses of Al–Zn–Mg–Cu alloys during hot deformation process

Cited by 30 publications

References 250 publications

Analysis of the Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate as corrosion inhibitor of the aluminum alloys in NaCl solution

Analysis of the Ce(III) chloride, Ce(III) nitrate, and Ce(III) propionate as corrosion inhibitor of the aluminum alloys in NaCl solution

Strain-Rate Dependence of Tensile Behavior in Commercial-Grade Tungsten—Effect of Recrystallization Condition

Hot Deformation Behavior and Microstructure Evolution of a Novel Al-Zn-Mg-Li-Cu Alloy

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