Influence of laser parameters and complex structural features on the bio-inspired complex thin-wall structures fabricated by selective laser melting

2019 ◽  
Vol 267 ◽  
pp. 34-43 ◽  
Author(s):  
Kaijie Lin ◽  
Luhao Yuan ◽  
Dongdong Gu
Keyword(s):  
Selective Laser Melting ◽  
Structural Features ◽  
Thin Wall ◽  
Laser Melting ◽  
Laser Parameters ◽  
Wall Structures ◽  
Complex Structural

scholarly journals Precise Machining Based on Ritz Non-uniform Allowances for Titanium Blade Fabricated by Selective Laser Melting

2021 ◽  
Author(s):  
Bo Zhang ◽  
Juntang Yuan ◽  
zhenhua wang ◽  
Xi Li
Keyword(s):  
Selective Laser Melting ◽  
End Milling ◽  
Deformation Model ◽  
Thin Wall ◽  
Laser Melting ◽  
Machining Processes ◽  
Element Analysis ◽  
Surface Error ◽  
Wall Stiffness ◽  
Finishing Machining

Abstract Selective Laser Melting (SLM) is an increasingly concerned trend in Ti-6Al-4V blade manufacturing, while the SLMed Ti-6Al-4V blade cannot be used directly because of poor surface integrity and high residual stresses. Precise machining after SLM is a feasible solution but also a challenge. The low rigidity of the blade will lead to deformation when machining. The deformation can lead to surface error and may make defect parts. Two-steps machining processes to address the problems were proposed in this paper. First, a non-uniform allowance distribution was allocated and optimized in semi-finishing based on Ritz solution to elastic deformation. The blade was simplified as a cantilever thin plate with various thickness, and the thickness of finishing allowance was designed and optimized on the premise of ensuring the thin-wall stiffness of the blade, so as to realize the design of Ritz non-uniform allowance. Then, finishing machining was conducted to achieve precise parts. A blade deformation model was established to evaluate surface error with cutting force moving and changing. Finite element analysis and experimental validation in ball-end milling of a blade were conducted. FEA results and experimental results showed dimensional errors have been reduced up to 50%. Further surface tests demonstrated that the mean surface roughness reduced from 7.88 μm to 0.815 μm. And the residual surface stresses of the SLM samples changed after semi-finishing machining due to the residual stress relaxation and redistribution. The results demonstrated that the proposed method enhanced the surface quality of blade fabricated by SLM.

Effect of laser parameters on microstructure, metallurgical defects and property of AlSi10Mg printed by selective laser melting

2017 ◽  
Vol 02 (04) ◽  
pp. 1750017 ◽  
Author(s):  
Hong Wu ◽  
Junye Ren ◽  
Qianli Huang ◽  
Xiongfei Zai ◽  
Ling Liu ◽  
...  
Keyword(s):  
Mechanical Property ◽  
Tensile Strength ◽  
Phase Composition ◽  
Selective Laser Melting ◽  
High Performance ◽  
Formation Mechanisms ◽  
Laser Melting ◽  
Laser Parameters ◽  
Metallurgical Defects ◽  
Metallurgical Defect

AlSi10Mg alloy has been widely used in selective laser melting (SLM). However, the formation of metallurgical defects in this material during SLM process has not been studied sufficiently. In this work, different laser parameters were adopted to fabricate the specimens. The effects of volumetric energy density (VED) on the metallurgical defect, densification, phase composition and mechanical property were also comprehensively analyzed. At low VED of 37.39[Formula: see text]J/mm3, a nearly full dense sample with density of 2.602[Formula: see text]g/cm3 can be printed. The sample with maximal tensile strength of 475[Formula: see text]MPa can be printed. While with the increase of VED, the ultimate tensile strength decreases due to the formation of micro-pores. The formation mechanisms of micro-pores including gas pores and keyhole-induced pores were disclosed from the angle of alloy smelting. Better understanding of the influence mechanisms of the laser parameters on the formation of metallurgical defects is beneficial for the production of high performance SLM parts.

Effect of substrate material on the molten pool characteristics in selective laser melting of thin wall parts

2019 ◽  
Vol 105 (7-8) ◽  
pp. 3221-3231 ◽  
Author(s):  
Shiwen Liu ◽  
Shijie Chang ◽  
Haihong Zhu ◽  
Jie Yin ◽  
Tingting Wang ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Molten Pool ◽  
Substrate Material ◽  
Thin Wall ◽  
Laser Melting

scholarly journals Influence of laser parameters on segregation of Nb during selective laser melting of Inconel 718

China Foundry ◽  
2021 ◽  
Vol 18 (4) ◽  
pp. 379-388
Author(s):  
Liang Wang ◽  
Ran Cui ◽  
Bin-qiang Li ◽  
Xue Jia ◽  
Long-hui Yao ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Inconel 718 ◽  
Laser Melting ◽  
Laser Parameters

Influence of laser energy input on fabricating pure tungsten thin wall grids by selective laser melting

2019 ◽  
Vol 6 (12) ◽  
pp. 126526
Author(s):  
Fang Wu ◽  
Zhonggang Sun ◽  
Bangyi Li ◽  
Hao Chen ◽  
Shengda Guo ◽  
...  
Keyword(s):  
Selective Laser Melting ◽  
Energy Input ◽  
Laser Energy ◽  
Thin Wall ◽  
Pure Tungsten ◽  
Laser Melting

scholarly journals Study of the Surface and Dimensional Quality of the AlSi10Mg Thin-Wall Components Manufactured by Selective Laser Melting

2021 ◽  
Vol 5 (5) ◽  
pp. 126
Author(s):  
Muhammad Waqas ◽  
Dingyong He ◽  
Hassan Elahi ◽  
Saleem Riaz ◽  
Marco Eugeni ◽  
...  
Keyword(s):  
Additive Manufacturing ◽  
Selective Laser Melting ◽  
Process Parameters ◽  
Wall Thickness ◽  
Reference Value ◽  
Dimensional Accuracy ◽  
Thin Wall ◽  
Laser Melting ◽  
Anova Technique

Additive manufacturing (AM), a 3D printing technique that manufactures components by sequential addition of powder, has massively reshaped the manufacturing and engineering sectors from batch production to manufacturing customized, innovative, state-of-the-art, and sustainable products. Additive manufacturing of aluminum alloys by selective laser melting (SLM) is one of the latest research trends in this field due to the fact of its advantages and vast applications in manufacturing industries such as automobiles and aerospace. This paper investigated the surface and dimensional quality of SLM-built AlSi10Mg parts using a response surface method (RSM) and found the influence of the wall thickness and process parameters (i.e., laser power, scanning speed, hatch distance) on the pieces. Thin-walled test specimens of AlSi10Mg alloy were manufactured with different combinations of process parameters at three wall thicknesses: 1.0 mm, 2.0 mm, and 3.0 mm. The Minitab DOE module was used to create 27 different configurations of wall thickness and process parameters. The samples’ surface roughness and dimensional accuracy were investigated, and the findings were evaluated using the ANOVA technique. The regression model and the ANOVA technique showed high precision and had a particular reference value for practical engineering applications.

Study on Process and Effective Factors of Stainless Steel Thin-Wall Parts Manufactured by Selective Laser Melting

2011 ◽  
Vol 38 (1) ◽  
pp. 0103001 ◽  
Author(s):  
杨永强 Yang Yongqiang ◽  
罗子艺 Luo Ziyi ◽  
苏旭彬 Su Xubin ◽  
王迪 Wang Di
Keyword(s):  
Stainless Steel ◽  
Selective Laser Melting ◽  
Thin Wall ◽  
Laser Melting ◽  
Effective Factors
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