结果表明,合金的TYS和UTS随着Li含量的增加而增加。对于0.2wt%Li的合金,其TYS和UTS是锌的两倍以上。当Li达到0.8wt%时,TYS和UTS分别增加到194MPa和213MPa,是锌的5倍以上。注意,锌-1.4Li合金极脆,无法获得拉伸性能。通过压缩试验测量的锌和ZneLi合金的强度与拉伸试验的趋势相同(表2和图。1c)。抗压屈服强度(CYS)和极限抗压强度(UCS)均低于70MPa的纯锌在其抗压应变(CS)达到2.6%时失效(表2)。对于合金,压缩试验停止在30%的大CS处,并得到了其UCS的下限。锌的CYS随着Li含量的增加而显著增加,从0.1%Li的116.9MPa增加到1.4%Li的372.1MPa。材料的硬度从纯锌的76HV急剧上升到锌-1.4Li合金的264.3HV(图。1d)。
The results show that TYSs and UTSs of the alloys increase with Li content. For the alloy with 0.2 wt% Li, its TYS and UTS are over two times of those of Zn. When Li reaches 0.8 wt%, TYS and UTS increase to 194 MPa and 213 MPa, respectively, which are over five times of those of Zn. Note that tensile properties of Zn-1.4Li alloy are failed to be obtained because it is extremely brittle. The strengths of Zn and ZneLi alloys measured by compressive tests show the same trend of those from the tensile tests (Table 2 and Fig. 1c). Pure Zn with compressive yield strength (CYS) and the ultimate compressive strength (UCS) lower than 70 MPa fails when its compressive strain (CS) reaches 2.6% (Table 2). For the alloys, the compressive tests stop at a large CS of 30%, and the lower limits of their UCSs are obtained. The CYS of Zn increases dramatically with Li content, from 116.9 MPa at 0.1% Li to 372.1 MPa at 1.4% Li. Consistently, the hardnesses of the materials rise dramatically from 76 HV of pure Zn to 264.3 HV of Zn-1.4Li alloy (Fig. 1d).