Microstructure and mechanical properties of a novel selective laser melted Al–Mg alloy with low Sc content

Churyumov, A. Yu.; Поздняков, А. В.; Prosviryakov, A. S.; Логинова, И. С.; Daubarayte, D. K.; Ryabov, D. K.; Королев, В. А.; Солонин, А. Н.; Павлов, М.; Valchuk, Sergey

doi:10.1088/2053-1591/ab5bea

Cited by 32 publications

(19 citation statements)

References 34 publications

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“…Some reports have indicated that heat treatment can improve the mechanical properties of SLM aluminum alloys. Churyumov et al [28] revealed that annealed SLM Al-Mg-Sc alloys exhibit excellent strength and ductility. Knoop et al [29] revealed that aging treatment parameters considerably affect the tensile strength of SLM Al-Si-Mg alloys.…”

Section: Introductionmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Fatigue Fracture Characteristics of High-Fracture-Resistance Selective Laser Melting Al-Ni-Cu Alloys

Chang

Zhao

Hung

2021

Metals

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Al-Ni-Cu alloys are used in energy, automotive, and aerospace industries because of their excellent mechanical properties, corrosion resistance, and high-temperature stability. In this study, Al-Ni-Cu alloy powder was subjected to selective laser melting (SLM). The SLM Al-Ni-Cu alloy was manufactured using appropriate printing parameters, and its properties were investigated. The results revealed that the As-printed material exhibited a typical melting pool stack structure, with an ultimate tensile strength of 725 MPa but a high brittleness effect (low ductility). After traditional heat treatment, the melting pool structure did not completely disappear. The strengthening phase Al7Cu23Ni precipitated from the boundary of the melting pools; thus, the Al-Ni-Cu alloy maintained high strength (>500 MPa) and considerably increased ductility (>10%). The SLM Al-Ni-Cu alloy has considerable industrial application potential; therefore, increasing the heat treatment temperature or extending the heat treatment time in the future works can promote the decomposition of the melting pool boundary and solve the problem related to the aggregation behavior of the precipitation phase, thereby improving the fatigue life of the alloy.

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Section: Introductionmentioning

confidence: 99%

Microstructure, Mechanical Properties, and Fatigue Fracture Characteristics of High-Fracture-Resistance Selective Laser Melting Al-Ni-Cu Alloys

Chang

Zhao

Hung

2021

Metals

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“…Al-Mg alloys have been widely used in the automobile, shipbuilding, and aerospace industries [1] . According to the literature [11][12][13][14] , the addition of Sc and Zr to an Al-Mg alloy forms an Al-Mg-Sc-Zr alloy in the Al matrix, which precipitates Al 3 (Sc, Zr) after aging treatment. This improves the mechanical properties of the material.…”

Section: Introductionmentioning

confidence: 99%

The Effects of Al3(Sc, Zr) Precipitation Phase on Selective Laser Melting Al-Mg-Sc-Zr alloy: Microstructure, Mechanical properties and Fatigue resistance

Lee¹,

Chang²,

Zhao³

et al. 2021

Preprint

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In this study, an Al-Mg-Sc-Zr alloy fabricated through selective laser melting (SLM) was subjected to a single-stage heat-treatment process and a two-stage heat-treatment process to determine the effect of heat treatment on the tensile properties and fatigue properties of the alloy at room temperature and high temperatures. The results indicated that heat treatment caused the precipitation of Al3(Sc, Zr), thus increasing the tensile strength. The dynamic strain aging of the SLM Al-Mg-Sc-Zr alloy disappeared as the tensile temperature increased. The alloy exhibited the highest tensile strength after it was subjected to the single-stage heat treatment at both room temperature and high temperatures owing to the precipitated phase distribution at the melting pool boundaries. However, fatigue resistance and high-temperature necking of the as-printed SLM Al-Mg-Sc-Zr alloy were problems that could not be resolved with the single-stage heat treatment. In the two-stage heat treatment, the precipitated phases exhibited a uniform distribution in the matrix, thereby reducing the high-temperature necking phenomenon. The two-stage heat treatment helped reduce the melting pool interface effect and strengthen the matrix, restricting the propagation of fatigue cracks and increasing the fatigue life of materials.

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“…However, the yield stress of as-built Scalmalloy is only about 290 MPa. Nevertheless, the mechanical properties of Scalmalloy can be further improved through precipitation strengthening by changing the precipitate spacing, size, and volume fraction, which can be affected by the heat-treatment parameters [1,20,[28][29][30]. Hence, it is important to study the heat-treatment parameter effects on the mechanical properties based on the microstructure evolution.…”

Section: Introductionmentioning

confidence: 99%

Microstructure Evolution and Mechanical Property Response of 3D-Printed Scalmalloy with Different Heat-Treatment Times at 325 °C

Kuo

Peng

Liu

et al. 2021

Metals

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According to the material nature, aluminum alloys are widely applied in aerospace, construction, and automotive applications due to their characteristics of being lightweight, having good formability, and having good corrosion resistance. To further improve the degree of the lightweight quality, introducing a new material with high specific strength and a structure with a lightweight design would be efficient. Scalmalloy (Al-4.49Mg-0.71Sc-0.51Mn-0.27Zr-0.07Fe-0.03Si alloy), which exhibits high specific strength and is made by a 3D printing process with less design limitation, has huge application potential. In this study, the selective laser melting (SLM) process was introduced for sample preparation. Through XRD, EBSD, and TEM, the microstructure of the heat-treated samples at 325 °C with different heat-treatment times was analyzed to evaluate the optimized heat-treatment parameter for 3D printed Scalmalloy. The relationship between the mechanical properties and the variation of precipitation size and volume fraction is discussed in detail in this study.

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Microstructure and mechanical properties of a novel selective laser melted Al–Mg alloy with low Sc content

Cited by 32 publications

References 34 publications

Microstructure, Mechanical Properties, and Fatigue Fracture Characteristics of High-Fracture-Resistance Selective Laser Melting Al-Ni-Cu Alloys

Microstructure, Mechanical Properties, and Fatigue Fracture Characteristics of High-Fracture-Resistance Selective Laser Melting Al-Ni-Cu Alloys

The Effects of Al3(Sc, Zr) Precipitation Phase on Selective Laser Melting Al-Mg-Sc-Zr alloy: Microstructure, Mechanical properties and Fatigue resistance

Microstructure Evolution and Mechanical Property Response of 3D-Printed Scalmalloy with Different Heat-Treatment Times at 325 °C

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