A strategy for enhancing the mechanical property of the precipitation-strengthened medium-entropy alloy

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

研究成果: Article査読

2 被引用数 (Scopus)

抄録

Medium-entropy alloys strengthened by the L12-type coherent precipitates were recently proposed, whereas the mechanical property still needs to be improved. Here, we demonstrated a strategy for notably improving the strength of the representative (CoCrNi)94Ti3Al3 alloy, in which the refinement of grain structures and the promotion of precipitation were concurrently achieved by pre-strain followed by aging. A refined grain structure containing incoherent σ-precipitates and a large number of coherent L12-precipitates was formed, which enhances the yield strength and ultimate tensile strength up to 1431 MPa and 1683 MPa respectively. Furthermore, decreasing pre-strain temperature or increasing strain further aids the enhancement. The present study opens an avenue for fabricating high-performance precipitation-strengthened alloys.

本文言語English
論文番号141390
ジャーナルMaterials Science and Engineering A
819
DOI
出版ステータスPublished - 2021 7 5

ASJC Scopus subject areas

  • 材料科学(全般)
  • 凝縮系物理学
  • 材料力学
  • 機械工学

フィンガープリント

「A strategy for enhancing the mechanical property of the precipitation-strengthened medium-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。

引用スタイル