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Chang, Yao Jen
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Topics
Publications (6/6 displayed)
- 2024The recrystallization behavior of cryo- and cold-rolled AlCoCrFeNiTi high entropy alloycitations
- 2022Revealing the Precipitation Sequence with Aging Temperature in a Non-equiatomic AlCoCrFeNi High Entropy Alloycitations
- 2021Reversal of favorable microstructure under plastic ploughing vs. interfacial shear induced wear in aged Co1.5CrFeNi1.5Ti0.5 high-entropy alloycitations
- 2021Aging temperature role on precipitation hardening in a non-equiatomic AlCoCrFeNiTi high-entropy alloycitations
- 2021Influence of pre-deformation on the precipitation characteristics of aged non-equiatomic Co1.5CrFeNi1.5 high entropy alloys with Ti and Al additionscitations
- 2020Enhanced age hardening effects in FCC based Co1.5CrFeNi1.5 high entropy alloys with varying Ti and Al contentscitations
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article
The recrystallization behavior of cryo- and cold-rolled AlCoCrFeNiTi high entropy alloy
Abstract
<p>The present work was conducted on the non-equiatomic Al<sub>0·2</sub>Co<sub>1·5</sub>CrFeNi<sub>1·5</sub>Ti<sub>0.3</sub> high entropy alloy (HEA), which was separately subjected to 50% cold- and cryo-rolling. Subsequent annealing was performed within the temperature range of 800–1000 °C to investigate their recrystallization behavior. A partial recrystallization was achieved up to 900 °C for the cold-rolled material, while the cryo-rolled one had shown nearly fully recrystallized microstructure after 800 °C. A significant reduction in grain size from the solution-treated state (∼784 μm) to fully recrystallized state (∼71 μm for cold-rolled and ∼6 μm for cryo-rolled) was observed. A combined XRD and TEM analysis confirms that the cryo-rolled sample exhibits higher dislocation density than the cold-rolled sample, which resulted in faster recrystallization kinetics observed in the former than in the latter. Additionally, the Johnson–Mehl–Avrami–Kolmogorov model was employed to understand the recrystallization behavior.</p>