Microstructure refinement of a transformation-induced plasticity high-entropy alloy

Hai Long Yi, Daixiu Wei, Ren Yi Xie, Yi Fan Zhang, Hidemi Kato

研究成果: Article査読

11 被引用数 (Scopus)


High-entropy alloys (HEAs) have attracted extensive interest due to their unprecedented structure and mechanical performance. We recently proposed a series of novel corich twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) HEAs with superior tensile properties at room temperature; however, the hot deformation behavior has not been reported. Here, we investigated the dynamic recrystallization behavior and grain refinement of a representative TRIP-HEA, compressed at temperatures of 1123–1273 K with strain rates of 0.1–0.001 s−1. We characterized the impact of the temperature and strain rate on the grain structure evolution. A constitutive equation was constructed to reveal the correlations between the flow stress, strain rate, temperature, and strain. The apparent activation energy was estimated to be ~385.7 kJ/mol. The discontinuous dynamic recrystallization played an important role in the grain refinement, particularly at a relatively higher temperature and a lower strain rate, and the volume fraction and morphology of the recrystallized grains exhibited a strong dependency on the Zener–Hollomon parameter. The study provides guidelines for the grain refinement of HEAs through thermomechanical processing.

出版ステータスPublished - 2021 3月 1

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学


「Microstructure refinement of a transformation-induced plasticity high-entropy alloy」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。