Effect of laser scanning speed on the microstructure, phase transformation and mechanical property of NiTi alloys fabricated by LPBF

Guo, Wenqian; Feng, Bo; Yang, Ying; Ren, Yang; Liu, Yinong; Yang, Hong; Yang, Qin; Cui, Lishan; Tong, Xin; Hao, Shijie

doi:10.1016/j.matdes.2022.110460

Cited by 53 publications

(25 citation statements)

References 49 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…тонкого" слоя от " толстого" состоит в уменьшении относительного отклонения приблизительно в 100 раз, что согласуется с оценками (13).…”

Section: главное отличие "unclassified

“…Величина сдвига становится малой для тонких слоев металла, см. (13). Асимметрия температурного профиля заметно уменьшается при увеличении скорости сканирования.…”

Section: заключениеunclassified

“…Нагрев вещества (в дальнейшем рассматриваем металл) происходит под воздействием лазерного пучка, сканирующего по поверхности образца. Режим сканирования во многом определяет качество изготавливаемых образцов, и поэтому влияние сканирования и выбор его стратегии широко изучаются в литературе (см., например, [9][10][11][12][13][14][15][16][17][18]). Следует отметить, что на практике между линиями сканирования всегда имеет место некоторый пространственный промежуток.…”

Section: Introductionunclassified

See 2 more Smart Citations

Нагрев Слоя Металла Сканирующим Лазерным Пучком

Trofimov

Lin

Федоров³

et al. 2023

Оптика И Спектроскопия

View full text Add to dashboard Cite

show abstract

Section: главное отличие "unclassified

Section: заключениеunclassified

Section: Introductionunclassified

See 1 more Smart Citation

Нагрев Слоя Металла Сканирующим Лазерным Пучком

Trofimov

Lin

Федоров³

et al. 2023

Оптика И Спектроскопия

View full text Add to dashboard Cite

show abstract

“…A lower scanning speed for LPBF can lead to an enhanced transformation temperature, i.e., stabilized martensite [141]. The finer grains formed as a result of a higher scanning speed enhance the fracture stress while slightly decreasing the fracture strain [143]. Moreover, Xue et al [130] reported that an increase in the scanning speed from 0.83 to 1.08 m/s seriously enhanced the ultimate tensile strength and percentage of elongation to failure.…”

Section: Powder-bed Fusion (Pbf) 221 Laser Powder-bed Fusion (Lpbf)mentioning

confidence: 99%

Additive Manufacturing: An Opportunity for the Fabrication of Near-Net-Shape NiTi Implants

Safavi

Bordbar‐Khiabani

Khalil‐Allafi

et al. 2022

JMMP

View full text Add to dashboard Cite

Nickel–titanium (NiTi) is a shape-memory alloy, a type of material whose name is derived from its ability to recover its original shape upon heating to a certain temperature. NiTi falls under the umbrella of metallic materials, offering high superelasticity, acceptable corrosion resistance, a relatively low elastic modulus, and desirable biocompatibility. There are several challenges regarding the processing and machinability of NiTi, originating from its high ductility and reactivity. Additive manufacturing (AM), commonly known as 3D printing, is a promising candidate for solving problems in the fabrication of near-net-shape NiTi biomaterials with controlled porosity. Powder-bed fusion and directed energy deposition are AM approaches employed to produce synthetic NiTi implants. A short summary of the principles and the pros and cons of these approaches is provided. The influence of the operating parameters, which can change the microstructural features, including the porosity content and orientation of the crystals, on the mechanical properties is addressed. Surface-modification techniques are recommended for suppressing the Ni ion leaching from the surface of AM-fabricated NiTi, which is a technical challenge faced by the long-term in vivo application of NiTi.

show abstract

“…Moreover, L-PBF also shows a great potential to act as a metallurgical method to modify the microstructure and phase transformation temperatures of NiTi alloys. For instance, in our previous work, it was found that the MTTs of L-PBF fabricated NiTi alloys increase monotonously with the increase of laser power ( P ), the decrease of scanning speed ( v ) or hatch spacing ( h ), mainly due to the increased Ni-loss by evaporation under high energy density [ 38 , 39 , 40 , 41 ]. This demonstrates that LPBF is a feasible method to modify the Ni concentration and, thus, the transformation temperature of NiTi alloys.…”

Section: Introductionmentioning

confidence: 99%

Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion

Jiang

et al. 2022

Materials

View full text Add to dashboard Cite

Besides the unique shape memory effect and superelasticity, NiTi alloys also show excellent damping properties. However, the high damping effect is highly temperature-dependent, and only exists during cooling or heating over the temperature range where martensitic transformation occurs. As a result, expanding the temperature range of martensite transformation is an effective approach to widen the working temperature window with high damping performance. In this work, layer-structured functionally graded NiTi alloys were produced by laser powder bed fusion (L-PBF) alternating two or three sets of process parameters. The transformation behavior shows that austenite transforms gradually into martensite over a wide temperature range during cooling, and multiple transformation peaks are observed. A microstructure composed of alternating layers of B2/B19′ phases is obtained at room temperature. The functionally graded sample shows high damping performance over a wide temperature range of up to 70 K, which originates from the gradual formation of the martensite phase during cooling. This work proves the potential of L-PBF to create NiTi alloys with high damping properties over a wide temperature range for damping applications.

show abstract

Effect of laser scanning speed on the microstructure, phase transformation and mechanical property of NiTi alloys fabricated by LPBF

Cited by 53 publications

References 49 publications

Нагрев Слоя Металла Сканирующим Лазерным Пучком

Нагрев Слоя Металла Сканирующим Лазерным Пучком

Additive Manufacturing: An Opportunity for the Fabrication of Near-Net-Shape NiTi Implants

Structure, Martensitic Transformation, and Damping Properties of Functionally Graded NiTi Shape Memory Alloys Fabricated by Laser Powder Bed Fusion

Contact Info

Product

Resources

About