A Review on Friction Stir Processing of Titanium Alloy: Characterization, Method, Microstructure, Properties

Shape memory based high performance nickel-titanium alloy particles were embedded by friction stir processing in graded concentration on the surface of light weight commercially pure magnesium cast plates. The novel functionally graded material so developed was analyzed for microhardness evolution and vibration damping effect. The nickel-titanium alloy particles were filled in a 2.5 wide × 3 mm deep slot and embedded on the surface by friction stir processing. A shallower slot 2.5 wide × 1.5 mm deep was milled over the previously embedded surface in which nickel-titanium alloy powder was again filled and embedded on the surface by second pass friction stir processing. This sequence of pass created the graded variation in nickel-titanium alloy concentration. The so fabricated functionally graded material was cut out from the plate and it was hot-forged to 2/3 thickness and subsequently quenched. The microstructural examination confirmed homogeneous dispersion of nickel-titanium alloy particles and clear interface between high and low concentration regions. The microhardness confirmed a uniform graded variation in hardness. The vibration damping tests confirm considerable improvement in the damping capacity of the fabricated functionally graded material.

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Friction Stir Processing of Metastable Beta Titanium Alloy Ti- 5Al-5Mo-5V-3Cr

Proceedings of the 13th World Conference on Titanium ◽

10.1002/9781119296126.ch40 ◽

2016 ◽

pp. 269-273

Author(s):

Shanoob Balachandran ◽

Rajiv S. Mshra ◽

Dipankar Banerjee

Keyword(s):

Titanium Alloy ◽

Friction Stir Processing ◽

Beta Titanium Alloy ◽

Friction Stir ◽

Beta Titanium ◽

Metastable Beta

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Friction Stir Processing Trials of SP-700 (Ti-4.5Al-3V-2Fe-2Mo) Titanium Alloy

Defect and Diffusion Forum ◽

10.4028/www.scientific.net/ddf.385.349 ◽

2018 ◽

Vol 385 ◽

pp. 349-354

Author(s):

Hamed Mofidi Tabatabaei ◽

Chiaki Okuyama ◽

Tadashi Nishihara ◽

Takahiro Ohashi

Keyword(s):

Titanium Alloy ◽

Friction Stir Processing ◽

Temperature Measurements ◽

Nominal Composition ◽

Friction Stir ◽

Automotive Components ◽

Beta Alloy ◽

Fine Microstructure ◽

Alpha Beta

Superplastic titanium alloy (SP-700 with nominal composition of Ti-4.5Al-3V-2Fe-2Mo) an alpha-beta alloy, with a beta-rich fine microstructure and excellent superplastic formability has wide applications in aerospace components, metal wood heads, tools, automotive components. However, very little information is available regarding friction stir processing (FSP) characteristics of this alloy. This study discusses the trials of FSP of this highly formable titanium alloy. Results are discussed in terms of hardness and temperature measurements and microstructural observations.

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Friction Stir Processing of Additively Manufactured Ti-6Al-4V Alloy: Structure Modification and Mechanical Properties

Metals ◽

10.3390/met12010055 ◽

2021 ◽

Vol 12 (1) ◽

pp. 55

Author(s):

Kirill Kalashnikov ◽

Andrey Chumaevskii ◽

Tatiana Kalashnikova ◽

Andrey Cheremnov ◽

Evgeny Moskvichev ◽

...

Keyword(s):

Titanium Alloy ◽

Friction Stir Processing ◽

Growth Direction ◽

Material Strength ◽

Material Structure ◽

Strength Increase ◽

Friction Stir ◽

Nickel Based Superalloy ◽

Columnar Grain ◽

Tensile Strength Increase

This work explores the possibility of using friction stir processing to harden the Ti-6Al-4V titanium alloy material produced by wire-feed electron beam additive manufacturing. For this purpose, thin-walled workpieces of titanium alloy with a height of 30 cm were printed and, after preparation, processed with an FSW-tool made of heat-resistant nickel-based superalloy ZhS6U according to four modes. Studies have shown that the material structure and properties are sensitive to changes in the tool loading force. In contrast, the additive material’s processing direction, relative to the columnar grain growth direction, has no effect. It is shown that increasing the axial load leads to forming a 𝛽-transformed structure and deteriorates the material strength. At the same time, compared to the additive material, the ultimate tensile strength increase during friction stir processing can achieve 34–69%.

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