如何使合金兼具高强度与高塑性

马恩, 刘畅

Achieving Alloys with Concurrent High Strength and High Ductility

MA En (MA Evan), LIU Chang

图2 几种典型结构调控案例：fcc-hcp相变诱导塑性[8]、fcc-bcc相变诱导塑性[9]、层错和孪晶诱导塑性[10]和“双峰”晶粒尺寸分布[13]

Fig.2 Several typical structural regulation cases (a) fcc-hcp transformation induced plasticity[8] (εloc—local strain, TD—tensile direction) (b) fcc-bcc transformation induced plasticity[9] with transformation-induced plasticity (TRIP) induced rapid strain hardening in engineering stress-strain curves (ΔUTS, ΔUE, and ΔYS represent the increase in the UTS, UE, and yield strength (YS), respectively. FNAT: Fe-32.6Ni-6.1Al-2.9Ti; FNAT-m: FNAT-matrix) (c) twinning induced plasticity with deformation twins and stacking faults (SFs)[10] (Letters M, T, and S represent the fcc-matrix, twin, and SFs, respectively) (d) bimodal grain size distribution[13]