Achieving high strength-ductility synergy in dilute Mg-Al-Ca alloy by trace Ce addition

Fu, Tong; Sun, Xinyu; Ge, Chuncheng; Xie, Dongsheng; Li, Jingren; Pan, Hucheng; Qin, Gaowu

doi:10.1016/j.jallcom.2022.165407

Cited by 17 publications

(3 citation statements)

References 32 publications

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“…This phenomenon is a little different from existing research [14]. It is assumed that the addition of cerium could promote the formation of element segregation [15,16]. TEM images (figure 3) show the presence of three different regions (re-gion I, II and III) with different structures.…”

Section: Microstructuresmentioning

confidence: 58%

Mechanical properties and impact energy release characteristics of Al_0.5NbZrTi_1.5Ta_0.8Ce_0.85 high-entropy alloy

Ma¹,

He²,

Zhou³

et al. 2022

Mater. Res. Express

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To explore the potential of high-entropy alloys (HEAs) as energetic structural materials (ESMs), Al0.5NbZrTi1.5Ta0.8Ce0.85 high-entropy alloys were prepared by vacuum arc melting. XRD and TEM indicated the coexistence of BCC and FCC structures. SEM images illustrated element segregation in HEA. HEA exhibited excellent mechanical properties and impact energy release characteristics. When the strain rate increased from 10-3 s-1 to 4500 s-1, the yield strength increased by 56.2% from 909 MPa to 1420 MPa. Under impact, the threshold of strain rate of HEA was about 1200 s-1. Bal-listic gun tests were performed to investigate the penetration behavior and energy-releasing characteristics. Al0.5NbZrTi1.5Ta0.8Ce0.85 could penetrate 6mm A3 plate at the speed of 712 m/s and ignite the cotton behind the target, combining excellent mechanical properties and impact energy release characteristics.

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Section: Microstructuresmentioning

confidence: 58%

Mechanical properties and impact energy release characteristics of Al_0.5NbZrTi_1.5Ta_0.8Ce_0.85 high-entropy alloy

Ma¹,

He²,

Zhou³

et al. 2022

Mater. Res. Express

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show abstract

“…According to the research by Fu and Jin [ 16 , 17 ], the addition of cerium could encourage the formation of element segregation. In addition, for systems before and after mixing, the change in Gibbs free energy plays an important part [ 18 ].…”

Section: Resultsmentioning

confidence: 99%

“…According to the law of mixing, the addition of soft cerium reduces the strength of alloys. However, on the other hand, the segregation of cerium atoms at dislocations could improve the resistance of dislocation movement, inhibit migration [ 16 ] and enhance yield strength. In addition, cerium can cause large lattice distortion [ 22 ] because of the large atomic radius, which can induce solid-solution strengthening.…”

Section: Resultsmentioning

confidence: 99%

Effects of Cerium Doping on the Mechanical Properties and Energy-Releasing Behavior of High-Entropy Alloys

Ma¹,

Zhou²,

Zhang³

et al. 2022

Materials

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Energetic structural materials play an important role in improving the damage performance of future weapons. To improve the energy-releasing behavior, Al0.5NbZrTi1.5Ta0.8Cex high-entropy alloys were prepared by vacuum-arc melting. The results showed the presence of BCC and FCC phases in the alloy with dendritic-morphology-element segregation and there were significant dislocations in the alloys. The current study focused on the effects of cerium content on the dynamic compressive mechanical and energetic characteristics. Cerium doping enhanced the energy-releasing characteristics of high-entropy alloys. The severity of the reaction increased with the increase in the cerium content, while the dynamic compressive strength generally decreased with the increase in cerium content. The Al0.5NbZrTi1.5Ta0.8Ce0.25 showed excellent mechanical and energy-releasing characteristics. The ballistic experiments indicated that Al0.5NbZrTi1.5Ta0.8Ce0.25 can penetrate 6-millimeter A3 plates and ignite the cotton behind the target at a velocity of 729 m/s, making it an ideal energetic structural material.

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Enhanced Strength-Ductility Synergy in Mg-0.5 wt%Ce Alloy by hot Extrusion

Liu

et al. 2022

Met. Mater. Int.

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Achieving high strength-ductility synergy in dilute Mg-Al-Ca alloy by trace Ce addition

Cited by 17 publications

References 32 publications

Mechanical properties and impact energy release characteristics of Al_0.5NbZrTi_1.5Ta_0.8Ce_0.85 high-entropy alloy

Mechanical properties and impact energy release characteristics of Al_0.5NbZrTi_1.5Ta_0.8Ce_0.85 high-entropy alloy

Effects of Cerium Doping on the Mechanical Properties and Energy-Releasing Behavior of High-Entropy Alloys

Enhanced Strength-Ductility Synergy in Mg-0.5 wt%Ce Alloy by hot Extrusion

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Achieving high strength-ductility synergy in dilute Mg-Al-Ca alloy by trace Ce addition

Cited by 17 publications

References 32 publications

Mechanical properties and impact energy release characteristics of Al0.5NbZrTi1.5Ta0.8Ce0.85 high-entropy alloy

Mechanical properties and impact energy release characteristics of Al0.5NbZrTi1.5Ta0.8Ce0.85 high-entropy alloy

Effects of Cerium Doping on the Mechanical Properties and Energy-Releasing Behavior of High-Entropy Alloys

Enhanced Strength-Ductility Synergy in Mg-0.5 wt%Ce Alloy by hot Extrusion

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Mechanical properties and impact energy release characteristics of Al_0.5NbZrTi_1.5Ta_0.8Ce_0.85 high-entropy alloy

Mechanical properties and impact energy release characteristics of Al_0.5NbZrTi_1.5Ta_0.8Ce_0.85 high-entropy alloy