High-strength ultrafine-grained Al–2Li (wt.%) alloy produced by accumulative roll bonding (ARB) process possessed poor uniform elongation, indicating that the ultrafine-grained Al–2Li alloy was susceptible to the inhomogeneous deformation (necking) and insufficient strain hardening. Through these strategies for designing and tailoring different microstructure: 1) suppressing recovery and recrystallization by cryogenic rolling, 2) forming a bimodal grain size by strain gradient distribution and 3) precipitating Al₃(Zr, Li) particles by introducing Al–2Li-0.1Zr layers, the simultaneous improvement in uniform elongation and strength of ultrafine grained Al–2Li alloy was achieved. The ultimate tensile strength (UTS) of ultrafine grained Al–2Li alloy was further improved from 300 MPa to 380 MPa by the combination of a bimodal grain size distribution and Al₃(Zr, Li) precipitates, meanwhile, the uniform elongation was significantly increased from 2.8% to 8.4%.

通过累积辊压结合（ARB）工艺生产的高强度超细晶粒Al-2Li（wt。％）合金的均匀伸长率很差，这表明超细晶粒Al-2Li合金易受不均匀变形（颈缩）和不足的影响。应变硬化。通过这些设计和定制不同显微组织的策略：1）通过低温轧制抑制恢复和再结晶； 2）通过应变梯度分布形成双峰晶粒尺寸； 3）沉淀Al ₃通过引入Al-2Li-0.1Zr层形成（Zr，Li）颗粒，可以同时提高超细晶粒Al-2Li合金的均匀伸长率和强度。通过双峰粒度分布和Al ₃（Zr，Li）析出相的结合，超细晶Al-2Li合金的极限拉伸强度（UTS）从300 MPa进一步提高到380 MPa ，同时均匀伸长率显着提高从2.8％增至8.4％。