Modeling and Optimization of Process Parameters for Laser Powder Bed Fusion of AlSi10Mg Alloy

Samantaray, Mihir; Thatoi, Dhirendra Nath; Sahoo, S.

doi:10.1007/s40516-019-00099-7

Cited by 19 publications

(6 citation statements)

References 24 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Different aspects of LPBF AlSi10Mg alloys have been previously discussed, which includes its process optimisation [13,14], mechanical behaviour [10,[15][16][17] and corrosion performance after heat treatment [9,11,18]. At present, the exploration work of LPBF AlSi10Mg alloy in terms of heat treatment is still mainly focused on traditional heat treatment, such as stress relief annealing and T6 heat treatment (solid solution and subsequent artificial aging) [2,10,15,17,[19][20][21][22].…”

Section: Introductionmentioning

confidence: 99%

Aging temperature effects on microstructure and mechanical properties for additively manufactured AlSi10Mg

Liang

Tiejun

Tounan

et al. 2023

Materials Science and Technology

View full text Add to dashboard Cite

AlSi10Mg alloy was prepared by laser powder bed fusion (LPBF). The evolution of microstructure and mechanical properties after diverse aging temperatures were systematically studied. The metastable ultra-fine cellular structure was obtained for as-built specimens. Aging at lower temperatures (100–225°C) promotes the formation of a large number of Si-rich precipitates, and the original Si networks can be retained. With the increase in aging temperature, Si network gradually broke apart, and Si-rich particles grew and spheroidised. The hardness increases with temperatures up to 175°C, and decreases thereafter, while the opposite trend was observed for elongation. Excellent comprehensive mechanical properties with a tensile strength of 381 MPa and elongation of 5.2% can be obtained at 225°C for 2 h. Highlights The effect of aging temperatures on microstructure stability and mechanical properties of additive manufacturing AlSi10Mg alloy has been revealed systematically. The Si-rich precipitates and eutectic Si network were responsible for the observed mechanical properties changes. A good combination of strength and ductility is obtained at 225°C for 2 h aging heat treatment.

show abstract

Section: Introductionmentioning

confidence: 99%

Aging temperature effects on microstructure and mechanical properties for additively manufactured AlSi10Mg

Liang

Tiejun

Tounan

et al. 2023

Materials Science and Technology

View full text Add to dashboard Cite

show abstract

“…One thing should be noted is that these parameters were chosen on the basis of our previous study which had proved to have a significant impact on inner structure quality. An optimal process parameter combination was obtained to improve circle-shape and square-shape overhanging surface quality respectively using multi-objective genetic algorithm [21][22][23]. The different formation mechanism of square-shape and circle-shape inner structure was firstly discussed to explain the phenomenon we have gained from the experiment section as far as we know.…”

Section: Methodsmentioning

confidence: 99%

A Multi-Objectives Genetic Algorithm Based Predictive Model and Strategy Optimization during SLM Process

Xia

Han

2022

Materials

View full text Add to dashboard Cite

Selective laser melting (SLM) process was optimized in this work using multi-objectives genetic algorithm. Process parameters involved in the printing process have an obvious impact on the quality of the printed parts. As the relationship between process parameters and the quality of different parts are complex, it is quite essential to study the effect of process parameter combination. In this work, the impact of four main process parameters, including defocusing amount, laser power, scan speed and layer thickness, were studied on overhanging surface quality of the parts with different inner structures. A multiple-factor and multiple-level experiment was conducted to establish a prediction model using regression analysis while multi-objective genetic algorithm was also employed here to improve the overhanging surface quality of parts with different inner shapes accordingly. The optimized process parameter combination was also used to print inner structure parts and compared with the prediction results to verify the model we have obtained before. The prediction results revealed that sinking distance and roughness value of the overhanging surface on a square-shape inner structure can reduce to 0.017 mm and 9.0 μm under the optimal process parameters combination, while the sinking distance and roughness value of the overhanging surface on a circle-shape inner structure can decrease to 0.014 mm and 10.7 μm under the optimal process parameters combination respectively. The testing results showed that the error rates of the prediction results were all within 10% in spite of random powder bonding in the printing process, which further proved the reliability of the previous results.

show abstract

“…Finally, a body of literature has attempted to overcome the challenge to rapidly identify the adequate parameters by combining simulations and experiments to obtain reliable data that can help optimise the production process [ 67 , 68 , 69 , 70 ]. Among others, Letenneur et al [ 69 ] evaluated the melt pool dimensions through an analytical model of a thermal field.…”

Section: Pre-processingmentioning

confidence: 99%

Ongoing Challenges of Laser-Based Powder Bed Fusion Processing of Al Alloys and Potential Solutions from the Literature—A Review

2023

View full text Add to dashboard Cite

Their high strength-to-weight ratio, good corrosion resistance and excellent thermal and electrical conductivity have exponentially increased the interest in aluminium alloys in the context of laser-based powder bed fusion (PBF-LB/M) production. Although Al-based alloys are the third most investigated category of alloys in the literature and the second most used in industry, their processing by PBF-LB/M is often hampered by their considerable solidification shrinkage, tendency to oxidation, high laser reflectivity and poor powder flowability. For these reasons, high-strength Al-based alloys traditionally processed by conventional procedures have often proved to be unprintable with additive technology, so the design and development of new tailored Al-based alloys for PBF-LB/M production is necessary. The aim of the present work is to explore all the challenges encountered before, during and after the PBF-LB/M processing of Al-based alloys, in order to critically analyse the solutions proposed in the literature and suggest new approaches for addressing unsolved problems. The analysis covers the critical aspects in the literature as well as industrial needs, industrial patents published to date and possible future developments in the additive market.

show abstract

Modeling and Optimization of Process Parameters for Laser Powder Bed Fusion of AlSi10Mg Alloy

Cited by 19 publications

References 24 publications

Aging temperature effects on microstructure and mechanical properties for additively manufactured AlSi10Mg

Aging temperature effects on microstructure and mechanical properties for additively manufactured AlSi10Mg

A Multi-Objectives Genetic Algorithm Based Predictive Model and Strategy Optimization during SLM Process

Ongoing Challenges of Laser-Based Powder Bed Fusion Processing of Al Alloys and Potential Solutions from the Literature—A Review

Contact Info

Product

Resources

About