纳米结构多主元合金的力学行为及强塑化机制

刘畅, 吴戈, 吕坚

Nanostructural Multi-Principal-Element Alloys: Mechanical Properties and Toughening Mechanisms

LIU Chang, WU Ge, LU Jian

图6 多主元合金中的孪生诱发塑性(TWIP)效应和相变诱发塑性(TRIP)效应^{[19,20,63,66,67]}

Fig.6 Twinning induced plasticity (TWIP) and transformation induced plasticity (TRIP) behaviors for multi-principal-element alloys
(a) twining was observed in a high-stacking fault energy Fe-26Mn-16Al-5Ni-5C alloy^[63] (TB—twin boundary)
(b) schematic of high-order twins^[67] (Ⅰ-Ⅶ—the order of nanotwins, θ_i —the angle of different nanotwins)
(c) a nanostructured (CoCrNi)₇₅Fe₂₁Si₂B₂alloy reveals five-order twins, which can serve as effect barriers against dislocation motion^[66]
(d) schematics of the deformation mechanism for a TRIP dual-phase Fe₅₀Mn₃₀Co₁₀Cr₁₀ alloy^[19]
(e) in situ SEM observations of the TRIP process in a Ta_0.5HfZrTi alloy during continuous loading^[20] (σ—tensile stress)