Selective laser melting of low-content graphene nanoplatelets reinforced 316L austenitic stainless steel matrix: Strength enhancement without affecting ductility

Han, Yongdian; Zhang, Yankun; Jing, Hongyang; Lin, Danyang; Zhao, Lei; Xu, Lianyong; Xin, Ping

doi:10.1016/j.addma.2020.101381

Cited by 26 publications

(9 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Due to the presence of impurities in the melt pool of UNT BM, the Marangoni convection was reversed, which circulated inward and downward, hindering hydrogen bubbles in the escape process [32][33][34]. At the same time, the oxide film and impurities affected the viscous force of the liquid metal [35].…”

Section: The Influence Mechanism Of Surface Treatment On Weldmentioning

confidence: 99%

Influence of surface pre-treatments on porosity and microstructure of laser welding in AlSi10Mg alloys sheets fabricated by selective laser melting

Wang

Cui

et al. 2023

Preprint

View full text Add to dashboard Cite

The surface pre-treatment is of great significance for improving the welding quality of metal materials, especially aluminum alloys. At present, the welding process is introduced to achieve the joining of the selective laser melting (SLM) AlSi10Mg alloys or their repair during manufacturing or service. However, the high susceptibility of hydrogen pores is one of the most important problems encountered in the fusion welding process of SLM AlSi10Mg alloys. To clarify the influence of the surface state of the base metal on the hydrogen pore characteristics, the SLM AlSi10Mg alloys sheets were pretreated by chemical cleaning treatment (CCT), mechanical polishing treatment (MPT) and chemical cleaning after mechanical polishing (MPT-CCT) before autogenous laser welding. Subsequently, the hydrogen pore characteristics, microstructure and micro-hardness of the weld joints were investigated. The experimental results show that the autogenous laser welding with MPT-CCT pre-treatment conspicuously reduces the porosity and pore diameter. In addition, TEM results show that MPT-CCT pre-treatment can eliminate most of the broken and discontinuous surface oxide film and Mg enrichment. In summary, the necessity of MPT-CCT surface pre-treatment for SLM aluminum alloy parts is analyzed systematically, which is of great significance to improve the welding quality.

show abstract

Section: The Influence Mechanism Of Surface Treatment On Weldmentioning

confidence: 99%

Influence of surface pre-treatments on porosity and microstructure of laser welding in AlSi10Mg alloys sheets fabricated by selective laser melting

Wang

Cui

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…Before AM is widely used in fabrication of GMMCs, somebody tried to use laser irradiation as consolidating way by melting Fe-based matrix with addition of single-layer GO layer by layer, and found that the fatigue property was largely improved due to the well-dispersed GO [55]. With the rapid development of AM processing technology and equipment, L-PBF and DED are widely used in consolidation of powder mixtures during fabrication of graphene/MMCs [47,53,56]. An unexpected result with enhanced strength and unaffecting ductility was obtained through L-PBF for GNP-316L matrix composite [56].…”

Section: Liquid Dispersionmentioning

confidence: 99%

“…With the rapid development of AM processing technology and equipment, L-PBF and DED are widely used in consolidation of powder mixtures during fabrication of graphene/MMCs [47,53,56]. An unexpected result with enhanced strength and unaffecting ductility was obtained through L-PBF for GNP-316L matrix composite [56]. It is reported that graphene and Al matrix can be bonded well with no gap via laser AM method as shown in figure 2(o) [47].…”

Section: Liquid Dispersionmentioning

confidence: 99%

Recent advances in 2D graphene reinforced metal matrix composites

Chen¹,

Zhou²

2021

Nanotechnology

View full text Add to dashboard Cite

The unique combination of excellent mechanical and functional properties makes graphene an ideal component for high-performance ‘smart’ composites, which are sensitive to thermal, optical, electrical and mechanical excitations, hence being potential in application of a range of sensors. It has confirmed that the addition of graphene into metal matrix can significantly enhance the mechanical property and deliver surprising functional properties. Thus, graphene reinforced metal matrix composites (GMMCs) have long been regarded as potential prospects of nanotechnology applications. Recently, researchers mainly focused on: (i) solving the interfacial issues and realizing controllable alignment of graphene in metal matrix to achieve optimal performance; (ii) reasonable designing of the microstructures basing on usage requirement and then fabricating via efficient technique. Thus, it is necessary to figure out key roles of microstructure in fabrication process, mechanical and multi-functional properties. This review consists of four parts: (i) fabrication process. The fabrication processes are firstly divided into three kinds basing on the different bonding nature between graphene and metal matrix. (ii) Mechanical property. The microstructural characteristics of metal matrix accompanying by the incorporation of graphene and their vital effects on mechanical properties of GMMCs are systematically summarized. (iii) Functional property. The crucial effects of microstructure on electrical and thermal properties are summarized. (iv) Prospect applications and future challenges. Application and challenges basing on the research status are discussed to provide useful directions for future exploration in related fields. All these four parts are discussed with a focus on key role of microstructure characteristics, which is instructive for the microstructures design and fabrication process optimization during academic researches and potential commercial applications.

show abstract

“…The strength and ductility of stainless steel also has a great influence on its application. Han et al [15] investigated the microstructural features and mechanical properties of graphene nanoplatelets (GNPs) reinforced 316L composite parts via SLM and found that GNPs reinforcement improves the strength of the 316L SS matrix without affecting the ductility. Co-based alloys are widely used in aerospace and biological field due to their excellent thermal corrosion resistance and corrosion resistance [8,16].…”

Section: Introductionmentioning

confidence: 99%

Selective Laser Melting of 316L Stainless Steel: Influence of Co-Cr-Mo-W Addition on Corrosion Resistance

Wang

et al. 2021

Metals

View full text Add to dashboard Cite

The selective laser melting (SLM) of o-Cr-Mo-W/316L composite with 10wt% Co-Cr-Mo-W addition to 316 L stainless steel (SS) powder is produced to explore it’s the corrosion behavior. The tensile experiment of SLM composites is also measured to investigate the difference between the two samples. The optimum parameters of SLM 316 L SS and it’s composite samples are obtained by adjusting laser power and scanning speed with the relative density of 99.04 ± 0.69 and 99.15 ± 0.43. The yield strength of samples is increased from 731.96 MPa to 784.09 MPa after doping, and no obvious crack or fracture failure in the tensile samples are observed, indicating that the excellent plasticity is still maintained. The corrosion resistance of samples is improved largely with an order of magnitude lower corrosion current density than that of 316 L SS and increasing of 277 mv of epit Ep. The addition of Cr element in the doped powder contributes to the formation of the passivated film containing Cr. The different pitting corrosion pit occurs mainly around the pre-existing pores of the powder and further extends outward to form pits with the increase of voltage.

show abstract

Selective laser melting of low-content graphene nanoplatelets reinforced 316L austenitic stainless steel matrix: Strength enhancement without affecting ductility

Cited by 26 publications

References 53 publications

Influence of surface pre-treatments on porosity and microstructure of laser welding in AlSi10Mg alloys sheets fabricated by selective laser melting

Influence of surface pre-treatments on porosity and microstructure of laser welding in AlSi10Mg alloys sheets fabricated by selective laser melting

Recent advances in 2D graphene reinforced metal matrix composites

Selective Laser Melting of 316L Stainless Steel: Influence of Co-Cr-Mo-W Addition on Corrosion Resistance

Contact Info

Product

Resources

About