Influence of Zr content on microstructure and mechanical properties of As-cast Al-Zn-Mg-Cu alloy

Yang, Yi; Tan, Pan; Sui, Yudong; Jiang, Yehua; Zhou, Rongfeng

doi:10.1016/j.jallcom.2021.158920

Cited by 32 publications

(10 citation statements)

References 24 publications

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“…[7][8][9] Irradiation damage also causes voids easily in metals and alloys. [10] Numerous experimental studies [11][12][13] have found that the growth and coalescence of the voids inside Al alloys are the main reasons for fracture. As crucial engineering materials, the mechanical properties of Al-Mg alloys have been affected by voids extensively.…”

Section: Introductionmentioning

confidence: 99%

Effect of void size and Mg contents on plastic deformation behaviors of Al–Mg alloy with pre-existing void: Molecular dynamics study

Wei

Shi

et al. 2022

Chinese Phys. B

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The plastic deformation properties of cylindrical pre-void Aluminum-Magnesium (Al-Mg) alloy under uniaxial tension are explored using molecular dynamics simulations with embedded atom method (EAM) potential. The factors of Mg content, void size, and temperature are considered. The results show that the void fraction decreases with increasing Mg in the plastic deformation, and it is almost independent of Mg content when Mg is beyond 5%. Both Mg contents and stacking faults around the void affect the void growth. These phenomena are explained by the dislocation density of the sample and stacking faults distribution around the void. The variation trends of yield stress caused by void size are in good agreement with Lubarda model. Moreover, temperature effects are explored, the yield stress and Young's modulus obviously decrease with temperature. Our results may enrich and facilitate the understanding of the plastic mechanism of Al-Mg with defects or other alloys.

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Section: Introductionmentioning

confidence: 99%

Effect of void size and Mg contents on plastic deformation behaviors of Al–Mg alloy with pre-existing void: Molecular dynamics study

Wei

Shi

et al. 2022

Chinese Phys. B

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“…When the Zr content reached 0.20 wt.%, the grain refinement effect was the best and the distance between secondary dendrite arms was the smallest. The ultimate tensile strength, yield strength and elongation at room temperature reached the maximum [ 12 ]. When Zr content was within a certain range, a fine Al 3 Zr dispersion phase could be formed, which increased the number of crystal nuclei and refined grains [ 13 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of Sm + Er and Heat Treatment on As-Cast Microstructure and Mechanical Properties of 7055 Aluminum Alloy

Wang

2023

Materials

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The 7055 aluminum alloy is an ultra-high strength aluminum alloy, which is widely used in the aerospace field and new energy automobile manufacturing industry. As it retains high strength, its plastic deformation ability needs to be improved, which limits its application in plastic processing. In this study, the cast grains of the 7055 aluminum alloy were refined by adding Sm + Er, and the proper heat treatment procedure was utilized to further precipitate the rare earth phase in order to increase the alloy’s strength and toughness. The grain size, microstructure and phase were characterized by optical microscopes (OMs), scanning electron microscopy—energy spectrum (SEM-EDS) and a XRD diffractometer (XRD). The macroscopic hardness, yield strength and tensile strength of alloy materials were measured by a hardness meter and universal electronic tensile machine. The results showed that the as-cast sample and the heat treatment sample all contained Al10Cu7Sm2 and Al8Cu4Er rare earth phases. But, after heat treatment, the volume percentage of the rare earth phase dramatically increased and the dispersion was more unified. When 0.3 wt.%Sm and 0.1 wt.%Er were added, the grain size could be refined to 53 μm. With the increase in the total content of rare earth elements, the refining effect first increased and then decreased. Under 410 °C solid solution for 2 h + 150 °C and aging for 12 h, the macroscopic hardness, yield strength, tensile strength and elongation of 0.3 wt.%Sm + 0.1 wt.%Er + 7055 as-cast samples were 155.8 HV, 620.5 MPa, 658.1 MPa and 11.90%, respectively. After the addition of Sm and Er elements and heat treatment, the grain refinement effect of 7055 aluminum alloy was obvious and the plastic property was greatly improved under the premise of maintaining its high-strength advantage.

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Section: Introductionmentioning

confidence: 99%

“…Alloying is an efficient method to improve the comprehensive properties of Al-Zn-Mg-Cu alloys [11,12]. The addition of Zr and Sc to Al-Zn-Mg-Cu alloys can promote the formation of equiaxed grains and coherent Al 3 (Zr,Sc) particles in solidification structure, which led to improved mechanical properties [12][13][14][15] and a superior hydrogen embrittlement resistance [16]. It was well known that both equiaxed grains and large eutectic amount in solidification structure can reduce the pressure drop of the intergranular channel and subsequently improve the intergranular feeding ability [17].…”

Section: Introductionmentioning

confidence: 99%

Effect of Nickel Addition on Solidification Microstructure and Tensile Properties of Cast 7075 Aluminum Alloy

Wang,

Qi,

et al. 2023

Crystals

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In order to explore the casting technology of a high–strength aluminum alloy, the effects of nickel on the solidified microstructure and tensile properties of a 7075 aluminum alloy were studied. 7075 aluminum alloys without nickel and with 0.6% and 1.2% nickel were prepared by a casting method. The results showed that the increase of Ni content in the 7075 alloys increased the liquidus temperatures, primary α (Al) grains were refined significantly, and the divorced eutectic structure was gradually formed among α (Al) grains with the preformation of the Al3Ni phase. In comparison, the 7075 alloy with 0.6% nickel content had less intergranular shrinkage porosity, and its elongation and ultimate tensile strength was enhanced 45% and 105% higher than those of the as-cast 7075 aluminum alloy, respectively. When the Ni content was increased to 1.2%, the eutectic phases of the alloy became much coarser compared to the other two alloys, and the mechanical properties obviously reduced too.

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Influence of Zr content on microstructure and mechanical properties of As-cast Al-Zn-Mg-Cu alloy

Cited by 32 publications

References 24 publications

Effect of void size and Mg contents on plastic deformation behaviors of Al–Mg alloy with pre-existing void: Molecular dynamics study

Effect of void size and Mg contents on plastic deformation behaviors of Al–Mg alloy with pre-existing void: Molecular dynamics study

Effect of Sm + Er and Heat Treatment on As-Cast Microstructure and Mechanical Properties of 7055 Aluminum Alloy

Effect of Nickel Addition on Solidification Microstructure and Tensile Properties of Cast 7075 Aluminum Alloy

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