Microstructural characteristic and mechanical properties of titanium-copper alloys in-situ fabricated by selective laser melting

Wang, Qiang; Zhang, Kang; Niu, Wenjuan

doi:10.1016/j.jallcom.2021.161032

Cited by 27 publications

(3 citation statements)

References 33 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…[5,48,49] Wei et al [50] introduced TiC nanoparticles into Ni-based René 104 superalloy to decrease the number of cracks using SLM. Zhang et al [51] and Wang et al [52] described the innovated TiÀCu alloys that possess a very fine structure after AM. All these studies tried to fabricate new alloy systems to obtain desired microstructure and refined grains.…”

Section: Potential Methods For Grain Refinement and Duplex Feature Of...mentioning

confidence: 99%

Selective Laser Melting of 304L and 316L Stainless Steels: A Comparative Study of Microstructures and Mechanical Properties

Zhai

Zhou

Zhu

et al. 2022

steel research int.

View full text Add to dashboard Cite

Among various types of stainless steel, 304L and 316L have the most engineering applications. Herein, 304L and 316L powders with similar size distributions and morphologies are used as raw materials for selective laser melting (SLM) using the same parameters. It is found that SLM 304L has two phases, γ-austenite (%95%) and δ-ferrite (%5%) phases, while SLM 316L contains only γ-austenite phase. The average grain size is found to be 4.9 μm (average grain size of γ-austenite phase: 5.0 μm; δ-ferrite: 3.4 μm) for SLM 304L and 16.7 μm for SLM 316L. The small grain size of 304L is attributed to the peritectic reaction during solidification. δ-ferrite acts as a heterogeneous nucleation site for γ-austenite. SLM 316L has higher hardness and yield strength than 304L. Results obtained from the comparative study indicate that adding ferrite stabilizer elements (e.g., Cr, Mo, Si, Nb, or Ti) into 316L can lead to peritectic reaction or austenite to ferrite solid phase transformation, which is a possible approach for grain refinement.

show abstract

Section: Potential Methods For Grain Refinement and Duplex Feature Of...mentioning

confidence: 99%

Selective Laser Melting of 304L and 316L Stainless Steels: A Comparative Study of Microstructures and Mechanical Properties

Zhai

Zhou

Zhu

et al. 2022

steel research int.

View full text Add to dashboard Cite

show abstract

“…Установлено, что для получения бездефектных образцов из орто-сплава Ti 2 AlNb с добавлением микролегирующих элементов необходим подогрев подложки более 800 °С [20]. Тем не менее влияние меди на технологичность получения орто-сплава в процессе СЛП еще не было подробно изучено [21].…”

Section: введение введениеunclassified

Influence of copper on the microstructure and mechanical properties of titanium ortho-alloy produced by selective laser melting

Polozov,

Sokolova,

Gracheva

et al. 2024

Izv. VUZ. Poroshk. Met.

View full text Add to dashboard Cite

This study explores an intermetallic orthorhombic titanium alloy produced by incorporating varying copper concentrations ranging from 0 to 6 wt. % through in-situ doping during selective laser melting (SLM) fabrication, coupled with simultaneous substrate preheating. The investigation delves into the influence of copper introduction on grain refinement within the primary B2/β-phase and subsequent alterations in mechanical properties. Through X-ray diffraction analysis and scanning electron microscopy, the microstructure characterized by the presence of the B2/β-phase and orthorhombic phase precipitates was identified. Additionally, the detection of a minor quantity of the α2-Ti3Al-phase was noted, with its proportion increasing proportionally with the augmentation of copper content. Differential scanning calorimetry revealed a shift in the phase transformation temperatures towards higher temperatures and a constricted α2-Ti3Al + B2/β + Ti2AlNb region, attributed to the inclusion of copper. The addition of copper, up to 6 wt. %, resulted in the softening and embrittlement of the orthorhombic alloy, forming a fine-grained microstructure with an average grain size of 8.3 μm. Energy dispersive X-ray spectroscopy confirmed the presence of an intermetallic O-phase along the grain boundaries, contributing to a 12 % increase in hardness compared to the orthorhombic alloy without copper after SLM with substrate heating at 850 °C. An alloy containing 4 wt. % copper exhibited superior plastic properties and a tensile strength of 1080 MPa, comparable to the strength of the orthorhombic alloy obtained via SLM followed by hot isostatic pressing.

show abstract

“…The content of Cu is recommended to be low to provide high mechanical properties. In [30], the authors managed to achieve a uniform distribution of titanium and copper in a mixture with contents ranging from 1.25-5% by weight. It is noted that even a small increase in copper content significantly improves mechanical properties.…”

Section: A State Of the Art On The L-pbf Mmcsmentioning

confidence: 99%

Physical and technological aspects of formation of metal matrix composites by laser-powder bed fusion

Pivkin,

Gusarov,

Khmyrov

et al. 2024

Laser + Photonics for Advanced Manufacturing

View full text Add to dashboard Cite

Due to high functional properties such as resistance to mechanical, thermal and other physical and chemical impacts, metal matrix composites (MMCs) are widely used in high-tech industries for instance aerospace, automotive, medical, chemical, etc. Modern additive technologies that produce 3D products from metal powders using lasers are unique in terms of the possibility of obtaining new materials and complex parts with the required functional properties in one manufacturing cycle. Laser Powder Bed Fusion (L-PBF) technology makes it possible to greatly facilitate and accelerate the production of such products directly from their CAD (computer-aided design) models. The fundamentals of L-PBF technology provide a significant advantage both in the development of new materials and the manufacture of products from them. However, direct formation (in situ) and application of MMCs in the L-PBF process is constrained by insufficient elaboration of the fundamentals of the formation of these materials during laser processing and incomplete knowledge of the influence of the properties and nature of the initial materials and technological parameters of L-PBF on the final properties of MMCs. The investigation of the processes of forming metal matrix composites by laser-powder bed fusion is driven by the need to ensure stable and confident properties of L-PBF MMCs materials and parts regardless of the equipment used. In this research, the fundamentals of the L-PBF process during in-situ manufacturing of MMCs from dissimilar powders having different melting points and granulomorphometric properties are considered. Preliminary numerical simulations of thermal fields for different parameters of the L-PBF process on the powder mixture have been carried out.

show abstract

Microstructural characteristic and mechanical properties of titanium-copper alloys in-situ fabricated by selective laser melting

Cited by 27 publications

References 33 publications

Selective Laser Melting of 304L and 316L Stainless Steels: A Comparative Study of Microstructures and Mechanical Properties

Selective Laser Melting of 304L and 316L Stainless Steels: A Comparative Study of Microstructures and Mechanical Properties

Influence of copper on the microstructure and mechanical properties of titanium ortho-alloy produced by selective laser melting

Physical and technological aspects of formation of metal matrix composites by laser-powder bed fusion

Contact Info

Product

Resources

About