High-speed impact behavior of a casting AM80 magnesium alloy under various deformation temperatures

Guo, Pengcheng; Li, Luoxing; Xiao, Gang; Cao, Shufen; Wang, Guan; He, Hong

doi:10.1016/j.jallcom.2019.151875

Cited by 16 publications

(11 citation statements)

References 36 publications

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“…Fourth, the lower deformation temperature of the second‐pass rolling should be considered as an important reason. [ 40 ] The activation of the slip behavior is limited due to the lower deformation temperature of the second‐pass rolling. The deformation in the later stage would depend on the limited slip behavior.…”

Section: Resultsmentioning

confidence: 99%

Microstructure Characterization and Mechanical Properties of an AM60B Magnesium Alloy Sheet Prepared by the Double‐Pass High Strain Rate Rolling with Gradient Cooling

Zhang

et al. 2020

Adv Eng Mater

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AM60B magnesium alloy sheets with excellent mechanical properties are prepared by a double‐pass high strain rate rolling (HSRR) with gradient cooling from 370 to 340 °C. A bimodal lamellar structure, consisting of fine dynamically recrystallized grains, shear bands and fine precipitates, is obtained after the second‐pass HSRR. Formation mechanisms of shear bands are studied in depth. The results show that the formation of shear bands are closely related to the high‐density intersected twin lamellae, boundaries of initial coarse grains and the extensive dynamic recrystallization (DRX), respectively. It is also clarified that the HSRR process of the coarse grained AM60B alloy is dominated in succession by the twinning deformation stage and the following shear bands flow stage. Dynamic precipitation behavior is induced in the double‐pass HSRR process. The DRX is promoted by fine precipitates, resulting in local refinement of the HSRR'ed microstructure. Moreover, the weak basal texture is obtained with peak intensity less than 10. The high‐density twins, DRX and shear bands are suggested as main causes for the basal texture weakening. An outstanding matching between tensile strength and ductility at room temperature are obtained owing to the bimodal lamellar structure and the weakened basal texture.

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Section: Resultsmentioning

confidence: 99%

Microstructure Characterization and Mechanical Properties of an AM60B Magnesium Alloy Sheet Prepared by the Double‐Pass High Strain Rate Rolling with Gradient Cooling

Zhang

et al. 2020

Adv Eng Mater

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“…3, 4 When magnesium alloy is used as a structural component, it may serve under complex load conditions. 5, 6 For example, the engine and gear housing of automobiles and aircraft will withstand high-speed impacts at different temperatures. Therefore, it is particularly important to study the microstructure evolution and deformation mechanism of magnesium alloys after dynamic loading at different temperatures and different strain rates.…”

Section: Introductionmentioning

confidence: 99%

“…At the same time, they have obtained a certain understanding of the high strain rate deformation mechanism and microstructure evolution of magnesium alloys at high temperatures. Guo 6 et al . studied the high strain rate deformation mechanism and microstructure evolution of AM80 magnesium alloy at high temperatures (298 K, 423 Kand523 K) and found that the flow stress decreased with increasing temperature.…”

Section: Introductionmentioning

confidence: 99%

Effect of low temperature and high strain rate compression on the microstructure evolution and mechanical behavior of Mg-2Y-0.6Nd-0.6Zr alloy

Luo

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part L:

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Mg-2Y-0.6Nd-0.6Zr alloy was implemented for compression test via split Hopkinson pressure bar under the conditions of low temperature and a high strain rate. The microstructure evolution and deformation mechanism of the processed material were characterized by optical microscopy (OM), electron backscatter diffraction (EBSD) and scanning electron microscopy (SEM) during the testing of low-temperature dynamic compression. As a result, Mg-2Y-0.6Nd-0.6Zr alloy exhibited a positive strain rate strengthening processed by low-temperature dynamic compression along the RD. In addition, the dynamic compressive strength and yield strength are significantly enhanced with the increasing strain rate, following the emerging of tension twins and a small amount of compression twins. The primary deformation mechanisms are the prismatic <a > slip system and {10[Formula: see text]2} tension twins. The Mg-2Y-0.6Nd-0.6Zr was fractured in a brittle manner at low temperature.

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“…Hence, the mechanical properties of magnesium and its alloy were low formability, limited ductility and premature failure no mater quasi-static or dynamic deformation [ 5 , 6 , 7 ]. However, compared with room temperature conditions, the deformation mechanisms of magnesium and its alloys were significantly different and complex under high temperatures [ 8 , 9 , 10 , 11 , 12 , 13 , 14 , 15 , 16 , 17 , 18 , 19 ]. According to the extreme requirement of the magnesium alloy structure application, the knowledge of their mechanical response and microstructure evolution under a high strain rate and elevated temperature were significantly important [ 20 , 21 , 22 ].…”

Section: Introductionmentioning

confidence: 99%

“…The strain rate increase was known to enhance the flow stress and weaken the fracture strain. However, in the research of a solution-treated cast AM80 magnesium alloy with the strain rate ranging from 1100 to 5000 s −1 at 298, 423 and 523 K, the effect of the strain rate on the fracture strain varied from enhanced to weakened as the strain rate increased to its critical value at all the temperature conditions [ 16 ]. It was found that the negative strain rate sensitivity was mainly caused by adiabatic shear bands (ASBs) and dynamic recrystallization (DRX).…”

Section: Introductionmentioning

confidence: 99%

Microstructural Characteristics and Subsequent Soften Mechanical Response in Transverse Direction of Wrought AZ31 with Elevated Compression Temperature

Yang

Zhang

et al. 2021

Materials

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In order to investigate the effect of temperature on the microstructure evolution and mechanical response in the transverse direction of a wrought AZ31 (AZ31-TD) alloy under a high strain rate, the dynamic compression was conducted using Split Hopkinson Pressure Bar (SHPB) apparatus and a resistance-heated furnace under 1000 s−1 at 20–250 °C. By combining optical and EBSD observations, the microstructure’s evolution was specifically analyzed. With the help of theoretically calculated Schmid Factors (SF) and Critical Resolved Shear Stress (CRSS), the activation and development deformation mechanisms are systematically discussed in the current study. The results demonstrated that the stress–strain curves are converted from a sigmoidal curve to a concave-down curve, which is caused by the preferentially and main deformation mechanism {101¯2} tension twinning gradually converting to simultaneously exist with the deformation mechanism of a non-basal slip at an elevated temperature, then completing with each other. Finally, the dynamic recrystallization (DRX) and non-basal slip are largely activated and enhanced by temperature elevated to weaken the {101¯2} tension twinning.

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High-speed impact behavior of a casting AM80 magnesium alloy under various deformation temperatures

Cited by 16 publications

References 36 publications

Microstructure Characterization and Mechanical Properties of an AM60B Magnesium Alloy Sheet Prepared by the Double‐Pass High Strain Rate Rolling with Gradient Cooling

Microstructure Characterization and Mechanical Properties of an AM60B Magnesium Alloy Sheet Prepared by the Double‐Pass High Strain Rate Rolling with Gradient Cooling

Effect of low temperature and high strain rate compression on the microstructure evolution and mechanical behavior of Mg-2Y-0.6Nd-0.6Zr alloy

Microstructural Characteristics and Subsequent Soften Mechanical Response in Transverse Direction of Wrought AZ31 with Elevated Compression Temperature

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