Revealing a Transformation-Induced Plasticity (TRIP) Phenomenon in a Medium-Entropy Alloy |
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| Authors: | Ibrahim Ondicho Bernard Alunda Dicken Owino Luke Otieno Melody Chepkoech |
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| Affiliation: | Department of Mechanical Engineering, Dedan Kimathi University of Technology, Private Bag-10143, Nyeri, Kenya;Materials, Design and Manufacturing (MADEMA)Group, Dedan Kimathi University of Technology, Private Bag-10143, Dedan Kimathi, Nyeri, Kenya;Department of Advanced Root Industry Engineering,Yuengnam University, Gyeongsan, South Korea;Department of Mining and Minerals Processing Engineering,Taita Taveta University, P.O.Box 635-80300, Voi, Kenya;Department of Mechanical Engineering, Inha University,Incheon, South Korea;School of Mechanical Engineering, Kyungpook National University, Daegu, South Korea;Department of Mechanical Engineering, Howard University,Washington, DC, USA |
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| Abstract: | A transformation-induced plasticity phenomenon in Fe65(CoCrMnNi)35 medium-entropy alloy was investigated. According to the X-ray diffraction patterns, the as-cast specimen contains a single-phase face-centered cubic (fcc), while low-temperature annealing at 500 °C and 600 °C leads to the introduction of a body-centered cubic (bcc) phase as a secondary phase. Further increment of the annealing temperature to above 700 °C eliminates the bcc phase, and the microstructure was found to contain a single-phase fcc. At 20% true strain, an fcc-to-bcc phase transformation is observed; whereas, at 28% true strain, an fcc-to-hcp phase transformation takes place as an additional deformation mechanism. This strain-induced phase transformation phenomenon leads to improved tensile properties of this alloy. |
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| Keywords: | Phase transformation X-ray diffraction Mechanical behavior Microstructure evolution Multicomponent alloys |
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