A review on process parameters, microstructure and mechanical properties of additively manufactured AlSi10Mg alloy

Gite, Ravindra E.; Wakchaure, Vishnu D.

doi:10.1016/j.matpr.2022.09.100

Cited by 11 publications

(4 citation statements)

References 107 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This is primarily attributed to the fact that the temperatures employed during the DC and aging stages are substantially lower than those utilized for stress relief annealing and solid-solution treatment. Previous studies have demonstrated that stress relief annealing still maintains the structural characteristics of melt pools, whereas solid-solution treatment brings about discernible alterations [6,12].…”

Section: The Effect Of Dca Treatment On Microstructurementioning

confidence: 99%

“…Research suggests that annealing at 300 • C for 2 h effectively reduces residual stress in the AlSi10Mg alloy, but it compromises strength by forming equilibrium phases and coarsening eutectic Si [12,13]. The T6 treatment, involving solutionizing at 550 • C for 2 h and aging at 180 • C for 2 h, nearly eliminates residual stress but also reduces ultimate tensile strength (UTS) to approximately 330 MPa due to the coarsening of the Si phase and the formation of acicular Al-Fe-Si [6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Deep Cryogenic Aging Treatment on Microstructure and Mechanical Properties of Selective Laser-Melted AlSi10Mg Alloy

Tang,

Yan,

et al. 2024

Metals

View full text Add to dashboard Cite

Deep cryogenic aging (DCA) is a newly developed heat treatment technique for additive-manufactured metallic materials to reduce residual stress and improve their mechanical properties. In this study, AlSi10Mg alloy samples fabricated by selective laser melting were deep-cryogenic-treated at −160 °C and subsequently aged at 160 °C. Phase and microstructural analyses were conducted using X-ray diffraction, optical microscopy, scanning electron microscopy, and transmission electron microscopy, while the mechanical properties were evaluated through microhardness and tensile testing at room temperature. The results indicated that the DCA treatment did not have an effect on the morphology of the melt pools. However, it facilitated the formation of atomic clusters and nanoscale Si and β′ phases, as well as accelerating the coarsening of grains and the ripening of the eutectic Si phase. After DCA treatment, the mass fraction of the Si phase experienced an increase from 4.4% to 7.2%. Concurrently, the volume fraction of the precipitated secondary phases elevated to 5.1%. The microhardness was enhanced to 147 HV, and the ultimate tensile strength and yield strength achieved 495 MPa and 345 MPa, respectively, with an elongation of 7.5%. In comparison to the as-built specimen, the microhardness, ultimate tensile strength, and yield strength increased by 11.4%, 3.1%, and 19.0%, respectively. The improvement in mechanical properties is primarily attributed to the Orowan strengthening mechanism induced by the secondary phases.

show abstract

Section: The Effect Of Dca Treatment On Microstructurementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Effect of Deep Cryogenic Aging Treatment on Microstructure and Mechanical Properties of Selective Laser-Melted AlSi10Mg Alloy

Tang,

Yan,

et al. 2024

Metals

View full text Add to dashboard Cite

show abstract

“…Laser-based powder bed fusion (L-PBF) technology is one of the most commonly used Additive Manufacturing (AM) techniques to produce high-value-added parts in the biomedical, energy, aerospace, and automotive industries. It is receiving significant attention in metal manufacturing as it produces customizable and complex high-performance components with significant weight savings [1][2][3]. AlSi alloys, especially the AlSi10Mg alloy, are perfect candidates to make structural components by the L-PBF process due to their excellent castability, high thermal conductivity, and excellent strength-to-weight ratio achieved by precipitation hardening of the metastable Mg 2 Si phase during and after printing [4][5][6].…”

Section: Introductionmentioning

confidence: 99%

Influence of Microstructure on Fracture Mechanisms of the Heat-Treated AlSi10Mg Alloy Produced by Laser-Based Powder Bed Fusion

et al. 2023

View full text Add to dashboard Cite

Few systematic studies on the correlation between alloy microstructure and mechanical failure of the AlSi10Mg alloy produced by laser-based powder bed fusion (L-PBF) are available in the literature. This work investigates the fracture mechanisms of the L-PBF AlSi10Mg alloy in as-built (AB) condition and after three different heat treatments (T5 (4 h at 160 °C), standard T6 (T6B) (1 h at 540 °C followed by 4 h at 160 °C), and rapid T6 (T6R) (10 min at 510 °C followed by 6 h at 160 °C)). In-situ tensile tests were conducted with scanning electron microscopy combined with electron backscattering diffraction. In all samples the crack nucleation was at defects. In AB and T5, the interconnected Si network fostered damage at low strain due to the formation of voids and the fragmentation of the Si phase. T6 heat treatment (T6B and T6R) formed a discrete globular Si morphology with less stress concentration, which delayed the void nucleation and growth in the Al matrix. The analysis empirically confirmed the higher ductility of the T6 microstructure than that of the AB and T5, highlighting the positive effects on the mechanical performance of the more homogeneous distribution of finer Si particles in T6R.

show abstract

“…In light of the above, this paper focuses on the effect of a Ni-9%P + DLC (hydrogenated amorphous carbon, a-C:H) multilayer coating on the microstructure and mechanical behavior of the PBF-LB-produced AlSi10Mg alloy, which is characterized by good thermal conductivity and weldability, low solidification shrinkage and cracking, and a high strengthto-weight ratio. These features enable the production of high-performance and lightweight structural components, reducing fuel consumption and CO 2 emissions in automotive and aerospace applications [31,32].…”

Section: Introductionmentioning

confidence: 99%

Influence of Electroless Nickel—DLC (Diamond-like Carbon) Multilayer Coating on the Mechanical Performance of the Heat-Treated AlSi10Mg Alloy Produced by Powder Bed Fusion-Laser Beam

et al. 2023

View full text Add to dashboard Cite

This study characterizes the mechanical performance of the AlSi10Mg alloy produced by powder bed fusion-laser beam (PBF-LB) subjected to two combined cycles consisting of multilayer coating deposition (electroless nickel (Ni-P) + diamond-like carbon (DLC)) and heat treatment. In particular, the DLC deposition phase replaces the artificial aging step in the T5 and T6 heat treatments, obtaining the following post-production cycles: (i) Ni-P + DLC deposition and (ii) rapid solution (SHTR) (10 min at 510 °C) before Ni-P + DLC deposition. Microstructural characterization shows no appreciable modifications in the morphology and dimensions of the hard Si-rich phase of the eutectic network and secondary spheroidal Si phase. However, overaging phenomena induced by DLC coating deposition and differences in elastic-plastic properties between the multilayer coating and the PBF-LB AlSi10Mg substrate lead to a reduction in tensile strength by up to 31% and a significant decrease in ductility by up to 58%. In contrast, higher resistance to crack opening thanks to improved surface hardness and residual compressive stresses of the coating and reduced defect sensitivity of the substrate increase the fatigue resistance by 54% in T5-coated alloy and 24% in T6R-coated alloy. Moreover, the coating remains well adherent to the substrate during fatigue testing, not becoming a source of fatigue cracks.

show abstract

A review on process parameters, microstructure and mechanical properties of additively manufactured AlSi10Mg alloy

Cited by 11 publications

References 107 publications

Effect of Deep Cryogenic Aging Treatment on Microstructure and Mechanical Properties of Selective Laser-Melted AlSi10Mg Alloy

Effect of Deep Cryogenic Aging Treatment on Microstructure and Mechanical Properties of Selective Laser-Melted AlSi10Mg Alloy

Influence of Microstructure on Fracture Mechanisms of the Heat-Treated AlSi10Mg Alloy Produced by Laser-Based Powder Bed Fusion

Influence of Electroless Nickel—DLC (Diamond-like Carbon) Multilayer Coating on the Mechanical Performance of the Heat-Treated AlSi10Mg Alloy Produced by Powder Bed Fusion-Laser Beam

Contact Info

Product

Resources

About