Hot tensile deformation behavior of extruded LAZ532 alloy with heterostructure

Li, Xiaoqiang; Le, Qichi; Li, Dandan; Wang, Ping; Jin, Peipeng; Cheng, Chuan; Chen, Xingrui; Ren, Liang

doi:10.1016/j.msea.2020.140412

Cited by 39 publications

(17 citation statements)

References 51 publications

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“…As a general rule, this stage was also characterized by measurable strain hardening (followed perhaps by strain softening), and subsequent steady-state flow was typically attributed to the activation of the grain-boundary sliding [2][3][4][5][6][7][8][9]11,12,14,15,[20][21][22]25,28,35,[39][40][41][42]. A somewhat similar behavior has also been observed during superplasticity of bimodal grain structures [28,43,44]. In such instances, the coarse-grained constituent typically experiences continuous recrystallization whereas the finegrained one undergoes grain-boundary sliding.…”

Section: Introductionmentioning

confidence: 62%

EBSD study of superplasticity: New insight into a well-known phenomenon

Myshlyaev

Mironov

Korznikova

et al. 2022

Journal of Alloys and Compounds

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Section: Introductionmentioning

confidence: 62%

EBSD study of superplasticity: New insight into a well-known phenomenon

Myshlyaev

Mironov

Korznikova

et al. 2022

Journal of Alloys and Compounds

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“…Therefore, extensive recrystallized grains could be stimulated by particle stimulation nucleation (PSN) [26,29]. During the deformation, these second phase particles hinder the movement of dislocations, increase the deformation energy storage, and increase the driving force for recrystallization as well [33,43]. As a result, the number of recrystallized grains increases, and the orientation of the newly formed recrystallized grains are random, so the texture intensity of the Mg-3Sn-1.5Mn alloy decreases.…”

Section: Discussionmentioning

confidence: 99%

Section: Microstructurementioning

confidence: 99%

“…Specifically, the number of second phase particles in this alloy increases (figure3). During the hot extrusion, these particles could hinder the movement of dislocations and increase the deformation energy storage, which increases the driving force for recrystallization, leading to an increase in the number of recrystallized grains[6,33]. The orientation of the newly formed recrystallized grains is random, so the texture intensity of the Mg-3Sn-1.5Mn alloy was weakened.Figure 7 shows the Schmid factor (SF) maps of the basal 〈a〉 slip (0001) 〈11-20〉, prismatic 〈a〉 slip (10-10) 〈11-20〉 and pyramidal 〈c+a〉 slip (11-22) 〈11-23〉 of the Mg-3Sn-xMn alloys, and the corresponding average SF are shown in figures as well.…”

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confidence: 99%

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Microstructure and enhanced mechanical properties of Mg-3Sn alloy with Mn addition

Fang¹,

Yu²,

Yuan

et al. 2022

Mater. Res. Express

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The effects of Mn content on the microstructure and mechanical properties of the extruded Mg-3Sn-xMn (x = 0, 0.5, 1.5, 2.5) alloys was systematically investigated in this study. More importantly, the relationship between microstructure and mechanical properties of Mg-Sn-Mn alloy was revealed in detail by calculating the various strength contribution value. The microstructure and mechanical properties of the alloys were characterized by X-ray diffraction (XRD), scanning electron microscope (SEM), electron backscatter diffraction (EBSD) and universal testing machine. The results revealed that the average grain size (AGS) decreased from 21.45 μm to 10.51 μm and then increased to 13.41 μm with increasing Mn content. It was observed that the second phases are dispersed in Mg-Sn-Mn alloys, namely the granular Mg2Sn phase and the rod-shaped α-Mn. Furthermore, the Mg-3Sn-1.5Mn alloy exhibits the optimal comprehensive mechanical properties with ultimate tensile strength (UTS), yield strength (YS), and elongation to fracture (EL) of 249.5 MPa, 203.3 MPa, and 19.3 %, respectively. The YS of Mg-3Sn-1.5Mn alloy was significantly enhanced by 42.5MPa than that of Mg-3Sn alloy, accompanied by a moderately improved elongation from 15.4% to 19.3%. The higher strength of the Mg-3Sn-1.5Mn alloy was attributed to grain refinement (25.2～28.8 MPa) and second phase strengthening (17.097～17.147 MPa), while the enhanced plasticity of the alloy is due to the weakening of the basal texture, and the higher SF of the prismatic <a> slip.

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“…Therefore, for the Mg-Li-Al-Nd alloy, the improvement of plastic formability of the alloy can be attributed to DRX softening and non-basal slip system activation during the hot deformation. Li et al (2021) studied the hot tensile deformation behavior of LAZ532 alloy. It is found that the hot tensile deformation mechanism of the alloy is more complicated, which is an alternate coordinated deformation mechanism between GBS, intragranular slip, and DRX.…”

Section: Introductionmentioning

confidence: 99%

Hot Tensile Deformation Behavior of Mg-4Li-1Al-0.5Y Alloy

Yang

Wang

et al. 2021

Front. Mater.

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The microstructure evolution and deformation mechanism of the as-extruded-annealed Mg-4Li-1Al-0.5Y alloy (denoted as LAY410) were investigated during the hot tensile deformation at the temperatures between 150°C and 300°C with strains from 8 × 10−5 s−1 to 1.6 × 10−3 s−1. The results show that when the strain rate decreases and/or the deformation temperature increases, the peak stress of the alloy gradually decreases, and the elongations to fracture gradually increases. The true stress–strain curves show typical dynamic recrystallization (DRX) softening characteristics. It is observed that the microstructure in the magnesium (Mg) alloy deformed at 150°C is mainly composed of the deformed grains and a few recrystallized grains. The microstructures in the Mg alloy deformed at 200°C consisted of substructures and a slightly increasing number of dynamic recrystallized grains. When the deformation temperature reaches 250°C, the number of recrystallized grains increases significantly, and the microstructures are dominated by recrystallized grains. Moreover, through theoretical calculation and result analysis, the activation energy was about 99.3 kJ/mol, and the hot tensile deformation mechanism was the alternate coordinated deformation mechanism among grain boundary slip (GBS), intragranular slip, and DRX.

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Hot tensile deformation behavior of extruded LAZ532 alloy with heterostructure

Cited by 39 publications

References 51 publications

EBSD study of superplasticity: New insight into a well-known phenomenon

EBSD study of superplasticity: New insight into a well-known phenomenon

Microstructure and enhanced mechanical properties of Mg-3Sn alloy with Mn addition

Hot Tensile Deformation Behavior of Mg-4Li-1Al-0.5Y Alloy

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