Competitive growth of leading phase and tensile properties of directionally solidified eutectic Al–Ni alloy

Peng, Peng; Zhang, Anqiao; Yue, Jinmian

doi:10.1016/j.msea.2019.138887

Cited by 15 publications

(3 citation statements)

References 24 publications

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“…Figures 6 and 7 illustrate the macroscopic fracture surface and tensile mechanical properties of the SLM Al-Ni-Cu alloy, respectively, at room temperature. The As-printed (specimen A) Al-Ni-Cu alloy UTS exhibited a mechanical strength of 725 MPa, which is considerably higher than that of other aluminum alloys obtained through SLM and the traditional manufacturing process [9,18,19,21,36]; however, the elongation of the As-printed alloy was only 3.1%. After solution heat treatment (530 • C for 1 h), the strength decreased but the elongation increased considerably.…”

Section: Tensile Properties and Hardnessmentioning

confidence: 80%

“…The mechanical properties of Al-Ni alloys in the conventional casting process are poor due to casting segregation. However, studies have indicated that the mechanical properties of Al-Ni alloys can be improved through heat treatment [3][4][5][6][7][8][9]. Suwanpreecha et al [3] doped up to 0.4 wt.% Sc in the cast Al-Ni alloy to improve the hardness and hightemperature stability without destroying the eutectic structure.…”

Section: Introductionmentioning

confidence: 99%

“…Suwanpreecha et al [3] doped up to 0.4 wt.% Sc in the cast Al-Ni alloy to improve the hardness and hightemperature stability without destroying the eutectic structure. Peng et al [9] revealed that directional solidification effectively improves the tensile strength and elongation of the aforementioned alloy. The limited mechanical properties of Al-Ni alloys inhibit their application.…”

Section: Introductionmentioning

confidence: 99%

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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: Tensile Properties and Hardnessmentioning

confidence: 80%