Details

Autor(en) / Beteiligte

• Chen, Y.
• Deng, H.W.
• Xie, Z.M.
• Wang, M.M.
• Yang, J.F.
• Zhang, T.
• Xiong, Y.
• Liu, R.
• Wang, X.P.
• Fang, Q.F.
• Liu, C.S.

Titel

Tailoring microstructures and tensile properties of a precipitation-strengthened (FeCoNi)94Ti6 medium-entropy alloy

Ist Teil von

• Journal of alloys and compounds, 2020-07, Vol.828, p.154457, Article 154457

Ort / Verlag

Lausanne: Elsevier B.V

Erscheinungsjahr

2020

Quelle

Access via ScienceDirect (Elsevier)

Beschreibungen/Notizen

• The coherent precipitate L12-type Ni3Ti nanoclusters and nano-sized particles in a fcc-FeCoNi medium-entropy alloy (MEA) matrix were designed and realized through minor Ti addition. The mechanical properties were modulated by thermo-mechanical processing and various annealing treatments, which leads to different hardening mechanisms such as dislocation strengthening and precipitation strengthening. An excellent combination of yield strength (∼893 MPa), ultimate tensile strength (UTS ∼ 1263 MPa) and ductility (∼24% elongation) can be achieved because of the precipitation strengthening from the L12-type Ni3Ti nano-sized precipitates. The present study is important not only for understanding the strengthening mechanisms of metallic materials, but also provides a generic way to obtain the desirable mechanical properties of alloys via microstructural regulation. •Precipitation of coherent nanoclusters in a fcc-FeCoNi medium-entropy alloy (MEA) was designed and realized.•An excellent combination of yield strength, ultimate tensile strength (1263 MPa) and ductility (24%) has been achieved.•This manuscript gives a detailed analysis of the relationships between the mechanical properties and microstructures.