Pulsed SLM-manufactured AlSi10Mg alloy: Mechanical properties and microstructural effects of designed laser energy densities

Wang, Lin-zhi; Sen, Wang; Hong, Xingfu

doi:10.1016/j.jmapro.2018.09.007

Cited by 56 publications

(31 citation statements)

References 23 publications

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“…It is worth noting that this contribution is negligible compared with load transfer strengthening. Solid solution strengthening has been proved to exist in both alloy and composites [27,45]. In this study, the solid solution strengthening is weakened due to the precipitation of the Si phase, and it is inappreciable compared with alloy for composite.…”

Section: Mechanical Propertiesmentioning

confidence: 90%

“…Compared with the microhardness of AlSi10Mg alloy, the average microhardness of the composite (120.0 HV) was slightly higher than that of the alloy (117.5 HV). Certainly, compared with cast AlSi10Mg (95 ~ 105 HV) [45], the microhardness have been both greatly improved. This is attributed to the large distribution of the Si phase in the Al matrix due to the rapid solidification and cooling rate of SLM.…”

Section: Morphology Variation and Interfacial Behavior Of Micro-tib 2mentioning

confidence: 99%

“…The closer it is to the bottom of the sample, the greater the cooling rate and temperature gradient of the melt will be, causing the larger residual stress, which increases the microhardness. The heat accumulation near the top surface could result in stress release, leading to the reduction of microhardness [45]. The composite part showed a reduced fluctuation of the microhardness values.…”

Section: Morphology Variation and Interfacial Behavior Of Micro-tib 2mentioning

confidence: 99%

“…(II) The uniformly dispersed micro-TiB 2 particles effectively inhibit the slipping of dislocation during deformation via the Orowan mechanism. (III) The strong interfacial bonding between the micro-particles and the matrix facilitates the transfer of the load from the aluminum matrix to TiB 2 particles [41,45,[47][48][49]. The strengthening effect caused by load transfer on yield strength can be specifically expressed by the shear lag model modified by Nardone and Prewo [50]:…”

Section: Mechanical Propertiesmentioning

confidence: 99%

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Effect of Trace Addition of Ceramic on Microstructure Development and Mechanical Properties of Selective Laser Melted AlSi10Mg Alloy

Zhang

et al. 2020

Chin. J. Mech. Eng.

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Selective laser melting (SLM) is an emerging additive manufacturing technology for fabricating aluminum alloys and aluminum matrix composites. Nevertheless, it remains unclear how to improve the properties of laser manufactured aluminum alloy by adding ceramic reinforcing particles. Here the effect of trace addition of TiB 2 ceramic (1% weight fraction) on microstructural and mechanical properties of SLM-produced AlSi10Mg composite parts was investigated. The densification level increased with increasing laser power and decreasing scan speed. A near fully dense composite part (99.37%) with smooth surface morphology and elevated inter-layer bonding was successfully obtained. A decrease of lattice plane distance was identified by X-ray diffraction with the laser scan speed decreased, which implied that the crystal lattices were distorted due to the dissolution of Si and TiB 2 particles. A homogeneous composite microstructure with the distribution of surface-smoothened TiB 2 particles was present, and a small amount of Si particles precipitated at the interface between reinforcing particles and matrix. In contrast to the AlSi10Mg alloy, the composites showed a stabilized microhardness distribution. A higher ultimate tensile strength of 380.0 MPa, yield strength of 250.4 MPa and elongation of 3.43% were obtained even with a trace amount of ceramic addition. The improvement of tensile properties can be attributed to multiple mechanisms including solid solution strengthening, load-bearing strengthening and dispersion strengthening. This research provides a theoretical basis for ceramic reinforced aluminum matrix composites by additive manufacturing.

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Section: Mechanical Propertiesmentioning

confidence: 90%

Section: Morphology Variation and Interfacial Behavior Of Micro-tib 2mentioning

confidence: 99%

Section: Morphology Variation and Interfacial Behavior Of Micro-tib 2mentioning

confidence: 99%

Section: Mechanical Propertiesmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Trace Addition of Ceramic on Microstructure Development and Mechanical Properties of Selective Laser Melted AlSi10Mg Alloy

Zhang

et al. 2020

Chin. J. Mech. Eng.

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“…One of the most commonly used aluminum alloys is AlSi10Mg, which belongs to the group of hypoeutectic aluminum alloys [ 4 ]. In addition to the abovementioned properties, it is characterized by its low density, excellent castability, and high electrical conductivity [ 4 , 5 ]. Moreover, eutectic Al + Si phase, present in AlSi10Mg alloy, affects its ductility and strength but also makes this material difficult to machine.…”

Section: Introductionmentioning

confidence: 99%

Investigation and Optimization of the SLM and WEDM Processes’ Parameters for the AlSi10Mg-Sintered Part

2021

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Presented study concerns the issue of processing the AlSi10Mg aluminum alloy with a use of WEDM technology. Two types of samples tested during the experiment were previously produced in SLM and in casting processes. The aim of the research was to determine the dependence of the input parameters of SLM (laser scanning speed) and WEDM (current amplitude) processes on the performance of the WEDM process as well as on the roughness of the cut surfaces. The experiment was carried out on a specially prepared test stand, and the results’ analysis was carried out using the ANOVA (analysis of variance). A strong influence of the WEDM current on the process speed and on the Ra and Rz roughness parameters of the produced samples was found. The effect of SLM laser scanning speed was not so strong, but it tended to be uniform. On the other hand, the influence of the tested parameters on the WEDM process energy turned out to be insignificant and irregular. It was also found that for the WEDM process a sample made in SLM technology with relatively high laser scanning speed may be a better choice than the cast one. A case study was carried out to optimize the parameters of the tested processes.

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Influence of structural features on processability, microstructures, chemical compositions, and hardness of selective laser melted complex thin-walled components

Yuan

Lin

et al. 2020

Int J Adv Manuf Technol

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Pulsed SLM-manufactured AlSi10Mg alloy: Mechanical properties and microstructural effects of designed laser energy densities

Cited by 56 publications

References 23 publications

Effect of Trace Addition of Ceramic on Microstructure Development and Mechanical Properties of Selective Laser Melted AlSi10Mg Alloy

Effect of Trace Addition of Ceramic on Microstructure Development and Mechanical Properties of Selective Laser Melted AlSi10Mg Alloy

Investigation and Optimization of the SLM and WEDM Processes’ Parameters for the AlSi10Mg-Sintered Part

Influence of structural features on processability, microstructures, chemical compositions, and hardness of selective laser melted complex thin-walled components

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