Cold-Workability and Microstructure Change with β-Phase Stability in High-Strength Ti-Mn Binary Alloys

Mohammed K. Gouda; Mohamed A.H. Gepreel; Kenta Yamanaka; Haukang Bian; Koichi Nakamura; Akihiko Chiba

doi:10.1007/s11837-019-03690-7

Cold-Workability and Microstructure Change with β-Phase Stability in High-Strength Ti-Mn Binary Alloys

Mohammed K. Gouda, Mohamed A.H. Gepreel, Kenta Yamanaka, Haukang Bian, Koichi Nakamura, Akihiko Chiba

Materials Processing and Characterization Division

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

The effect of manganese content (Mn-content) on the beta phase (β-phase) stability, plastic deformability and mechanical behavior of titanium and (8–18 wt.%) manganese low-cost alloys were investigated. The alloys were produced by electric-arc melting under inert argon atmosphere. Microstructure change during cold rolling was evaluated through x-ray diffraction, scanning electron microscope, transmission electron microscope and electron backscatter diffraction in solution-treated and cold-deformed conditions. The β-phase was predominant in all the alloys under study in addition to very fine ω-phase precipitates, especially in the lower Mn-content alloys. Cold workability of the alloys was initially increased in the low Mn-content alloys and then decreased dramatically in the higher Mn-content alloys. The deformation mechanisms were a combination between dislocation slipping and twinning, with a predominance of twinning in the low Mn-content and slipping in the high Mn-content alloys. Tensile test results showed that an ultra-high-strength alloy of about 1950 MPa was obtained in the high Mn-content alloys after cold deformation.

Original language	English
Pages (from-to)	3590-3599
Number of pages	10
Journal	JOM
Volume	71
Issue number	10
DOIs	https://doi.org/10.1007/s11837-019-03690-7
Publication status	Published - 2019 Oct 1

ASJC Scopus subject areas

Materials Science(all)
Engineering(all)

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title = "Cold-Workability and Microstructure Change with β-Phase Stability in High-Strength Ti-Mn Binary Alloys",

abstract = "The effect of manganese content (Mn-content) on the beta phase (β-phase) stability, plastic deformability and mechanical behavior of titanium and (8–18 wt.%) manganese low-cost alloys were investigated. The alloys were produced by electric-arc melting under inert argon atmosphere. Microstructure change during cold rolling was evaluated through x-ray diffraction, scanning electron microscope, transmission electron microscope and electron backscatter diffraction in solution-treated and cold-deformed conditions. The β-phase was predominant in all the alloys under study in addition to very fine ω-phase precipitates, especially in the lower Mn-content alloys. Cold workability of the alloys was initially increased in the low Mn-content alloys and then decreased dramatically in the higher Mn-content alloys. The deformation mechanisms were a combination between dislocation slipping and twinning, with a predominance of twinning in the low Mn-content and slipping in the high Mn-content alloys. Tensile test results showed that an ultra-high-strength alloy of about 1950 MPa was obtained in the high Mn-content alloys after cold deformation.",

author = "Gouda, {Mohammed K.} and Gepreel, {Mohamed A.H.} and Kenta Yamanaka and Haukang Bian and Koichi Nakamura and Akihiko Chiba",

note = "Funding Information: The authors gratefully acknowledge the Ministry of Higher Education (MoHE) of Egypt for providing a scholarship to conduct this study as well as the Japan International Cooperation Agency (JICA). This work is in the frame of the joint ASRT/DST research project. Funding Information: The authors gratefully acknowledge the Ministry of Higher Education (MoHE) of Egypt for providing a scholarship to conduct this study as well as the Japan International Cooperation Agency (JICA). This work is in the frame of the joint ASRT/DST research project. Publisher Copyright: {\textcopyright} 2019, The Minerals, Metals & Materials Society.",

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T1 - Cold-Workability and Microstructure Change with β-Phase Stability in High-Strength Ti-Mn Binary Alloys

AU - Gouda, Mohammed K.

AU - Gepreel, Mohamed A.H.

AU - Yamanaka, Kenta

AU - Bian, Haukang

AU - Nakamura, Koichi

AU - Chiba, Akihiko

N1 - Funding Information: The authors gratefully acknowledge the Ministry of Higher Education (MoHE) of Egypt for providing a scholarship to conduct this study as well as the Japan International Cooperation Agency (JICA). This work is in the frame of the joint ASRT/DST research project. Funding Information: The authors gratefully acknowledge the Ministry of Higher Education (MoHE) of Egypt for providing a scholarship to conduct this study as well as the Japan International Cooperation Agency (JICA). This work is in the frame of the joint ASRT/DST research project. Publisher Copyright: © 2019, The Minerals, Metals & Materials Society.

PY - 2019/10/1

Y1 - 2019/10/1

N2 - The effect of manganese content (Mn-content) on the beta phase (β-phase) stability, plastic deformability and mechanical behavior of titanium and (8–18 wt.%) manganese low-cost alloys were investigated. The alloys were produced by electric-arc melting under inert argon atmosphere. Microstructure change during cold rolling was evaluated through x-ray diffraction, scanning electron microscope, transmission electron microscope and electron backscatter diffraction in solution-treated and cold-deformed conditions. The β-phase was predominant in all the alloys under study in addition to very fine ω-phase precipitates, especially in the lower Mn-content alloys. Cold workability of the alloys was initially increased in the low Mn-content alloys and then decreased dramatically in the higher Mn-content alloys. The deformation mechanisms were a combination between dislocation slipping and twinning, with a predominance of twinning in the low Mn-content and slipping in the high Mn-content alloys. Tensile test results showed that an ultra-high-strength alloy of about 1950 MPa was obtained in the high Mn-content alloys after cold deformation.

AB - The effect of manganese content (Mn-content) on the beta phase (β-phase) stability, plastic deformability and mechanical behavior of titanium and (8–18 wt.%) manganese low-cost alloys were investigated. The alloys were produced by electric-arc melting under inert argon atmosphere. Microstructure change during cold rolling was evaluated through x-ray diffraction, scanning electron microscope, transmission electron microscope and electron backscatter diffraction in solution-treated and cold-deformed conditions. The β-phase was predominant in all the alloys under study in addition to very fine ω-phase precipitates, especially in the lower Mn-content alloys. Cold workability of the alloys was initially increased in the low Mn-content alloys and then decreased dramatically in the higher Mn-content alloys. The deformation mechanisms were a combination between dislocation slipping and twinning, with a predominance of twinning in the low Mn-content and slipping in the high Mn-content alloys. Tensile test results showed that an ultra-high-strength alloy of about 1950 MPa was obtained in the high Mn-content alloys after cold deformation.

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Cold-Workability and Microstructure Change with β-Phase Stability in High-Strength Ti-Mn Binary Alloys

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