Microstructure and mechanical properties of TC4 titanium alloy hollow shaft formed by cross wedge rolling

• Autorzy: Feng Pengni , Yang Cuiping , Wang Baoyu , Li Junling , Liu Ronge

Identyfikatory

DOI

10.1007/s43452-021-00276-6

• Języki publikacji: EN

Abstrakty

EN

Production of hollow shafts satisfying mechanical performance requirements can well meet the needs of lightweight. The purpose of this work is to investigate the effect of cross wedge rolling (CWR) process parameters on microstructure and mechanical properties of TC4 titanium alloy hollow shafts, so as to ensure the feasibility of forming TC4 titanium alloy hollow shaft by CWR. The results demonstrate that the initial deformation temperature, area reduction, wall thickness, and mandrel have significant effects on the volume fraction of primary alpha phase (fα_p), morphology of alpha phase and interface of alpha/beta phase. The decrease of the fα_p, the increase of fine secondary alpha phase content and the increase of the number of alpha/beta phase interfaces can increase the strength of TC4 alloy hollow shafts, but decrease the elongation. When the initial deformation temperature is 950 °C, the contribution of the thick secondary alpha phase is similar to that of the primary alpha phase, resulting in the decrease of strength. The strength is further improved owing to the grain refinement with the increase of area reduction to 60%. The strength decreases as the wall thickness increases owing to the non-uniform microstructure distribution, which can be improved by increasing the area reduction appropriately. The comprehensive mechanical properties of the workpiece rolled with a mandrel are evidently higher than that rolled without a mandrel. Under any forming condition in this work, every fracture surface is covered with abundant dimples and voids, showing good ductile fracture characteristics.

Słowa kluczowe

EN

TC4 titanium alloy; cross wedge rolling; microstructure; mechanical properties; hollow shafts

PL

stop tytanu; walcowanie klinowe; mikrostruktura; właściwości mechaniczne

• Wydawca: Springer ; Wrocław University of Science and Technology
• Czasopismo: Archives of Civil and Mechanical Engineering
• Rocznik: 2021
• Tom: Vol. 21, no. 3
• Strony: 737--751
• Opis fizyczny: Bibliogr. 23 poz., rys., wykr.

Twórcy

autor

Feng Pengni

• School of Mechanical Engineering, University of Science and Technology, No.30 Xueyuan Road, Haidian District, Beijing 100083, China

autor

Yang Cuiping

• School of Mechanical Engineering, University of Science and Technology, No.30 Xueyuan Road, Haidian District, Beijing 100083, China
• Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, Beijing 100083, China

autor

Wang Baoyu

• School of Mechanical Engineering, University of Science and Technology, No.30 Xueyuan Road, Haidian District, Beijing 100083, China
• Beijing Laboratory of Metallic Materials and Processing for Modern Transportation, Beijing 100083, China

• https://orcid.org/0000-0003-0462-9511

autor

Li Junling

• School of Mechanical Engineering, University of Science and Technology, No.30 Xueyuan Road, Haidian District, Beijing 100083, China

autor

Liu Ronge

• School of Mechanical Engineering, University of Science and Technology, No.30 Xueyuan Road, Haidian District, Beijing 100083, China

Bibliografia

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Uwagi

PL

Opracowanie rekordu ze środków MEiN, umowa nr SONP/SP/546092/2022 w ramach programu "Społeczna odpowiedzialność nauki" - moduł: Popularyzacja nauki i promocja sportu (2022-2023)