Additive manufacturing of dense components in beta‑titanium alloys with crystallographic texture from a mixture of pure metallic element powders

Nagase, Takeshi; Hori, Takao; Todai, Mitsuharu; Sun, Shang; Nakano, Takayoshi

doi:10.1016/j.matdes.2019.107771

Cited by 101 publications

(22 citation statements)

References 22 publications

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“…In contrast, Scan Strategy_XY produced a strong <001> alignment along the x, y, and z directions. The obtained results are similar to those reported for other materials with fcc and bcc structures [7][8][9][10].…”

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confidence: 91%

Control of crystallographic orientation by metal additive manufacturing process of β-type Ti alloys based on the bone tissue anisotropy

et al. 2020

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Variation in the scanning strategy for β-type Ti alloys during additive manufacturing (AM) enables the fabrication of a singlecrystal-like microstructure possessing a crystallographic texture, in which the low-Young’s modulus-<100> direction is aligned along a specific direction. Thus, metal biomaterial with low elasticity, comparable to the bone Young’s modulus, can be developed by AM, which will contribute to suppress the stress shielding of bone and prevent degradation of bone tissue anisotropy.

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confidence: 91%

Control of crystallographic orientation by metal additive manufacturing process of β-type Ti alloys based on the bone tissue anisotropy

et al. 2020

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“…As far as the authors are aware, the superelastic effect has not been observed in β phase titanium alloys obtained using AM techniques until now. The vast majority of the investigation in the field of AM concerns the influence of the processing parameters on the properties and microstructure of the alloys [ 18 , 55 , 56 ] or the fabrication of porous structures [ 11 , 57 ]. Fischer et al [ 58 ] conducted cyclic tests on Ti-27.5Nb fabricated using the CLAD technique but no evidence of superelasticity was reported.…”

Section: Resultsmentioning

confidence: 99%

Superelastic Behavior of Ti-Nb Alloys Obtained by the Laser Engineered Net Shaping (LENS) Technique

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The effect of Nb content on microstructure, mechanical properties and superelasticity was investigated for a series of Ti-xNb alloys, fabricated by the laser engineered net shaping method, using elemental Ti and Nb powders. The microstructure of as-deposited materials consisted of columnar β-phase grains, elongated in the built direction. However, due to the presence of undissolved Nb particles during the deposition process, an additional heat treatment was necessary. The observed changes in mechanical properties were explained in relation to the phase constituents and deformation mechanisms. Due to the elevated oxygen content in the investigated materials (2 at.%), the specific deformation mechanisms were observed at lower Nb content in comparison to the conventionally fabricated materials. This made it possible to conclude that oxygen increases the stability of the β phase in β–Ti alloys. For the first time, superelasticity was observed in Ti–Nb-based alloys fabricated by the additive manufacturing method. The highest recoverable strain of 3% was observed in Ti–19Nb alloy as a result of high elasticity and reverse martensitic transformation stress-induced during the loading.

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“…Taking advantage of such features of AM, metal AM technology has been applied to the fabrication of products with hollow structures, three-dimensional complex porous bodies, and tailor-made products, among others. 1,2) Meanwhile, in recent studies, metal AM has emerged as a methodology for controlling the crystallographic texture of metallic materials [3][4][5] in addition to controlling the shape of products. Crystallographic texture, which is an important material parameter for metallic materials, is a major factor that affects the functionality of a product, independent of shape parameters.…”

Section: Introductionmentioning

confidence: 99%

Crystallographic Orientation Control of 316L Austenitic Stainless Steel via Selective Laser Melting

Ishimoto

Ito

et al. 2020

ISIJ Int.

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Additive manufacturing of dense components in beta‑titanium alloys with crystallographic texture from a mixture of pure metallic element powders

Cited by 101 publications

References 22 publications

Control of crystallographic orientation by metal additive manufacturing process of β-type Ti alloys based on the bone tissue anisotropy

Control of crystallographic orientation by metal additive manufacturing process of β-type Ti alloys based on the bone tissue anisotropy

Superelastic Behavior of Ti-Nb Alloys Obtained by the Laser Engineered Net Shaping (LENS) Technique

Crystallographic Orientation Control of 316L Austenitic Stainless Steel via Selective Laser Melting

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