- [Korean]
- Effect of Fe and Cr on ω phase formation in metastable β-Ti alloy
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Sun-Young Park, Young-Bum Chun
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Received July 15, 2025 Accepted August 21, 2025 Published online August 21, 2025
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DOI: https://doi.org/10.4150/jpm.2025.00220
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 Abstract
- This study investigated the effects of Fe and Cr contents on ω phase formation and transformation during solution treatment and the subsequent aging process, for which four model alloys with varying Fe and Cr contents but keeping Mo equivalent of ~ 12.6 were prepared by plasma arc melting and fabricated into plates by hot forging followed by hot-rolling. The atherrmal ω phase was observed in all Ti alloys after solution treatment followed by water quenching through XRD and TEM analysis. The largest volume fraction of athermal ω phase is formed in Ti alloy with only Fe 4 wt.% among all Ti alloys, leading to the highest Vickers value due to hardening effect ω phase. It was found that not only Mo equivalent but also each characteristic of β stabilizing elements should be considered to understand a microstructure evolution and mechanical properties.
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