采用LAMMPS模拟不同Mg含量的铝镁合金从液态快速凝固成金属玻璃,研究了动态拉伸过程中温度对铝镁合金纳米线的拉伸强度和晶体结构的影响.结果表明:升高温度会降低纳米线的拉伸强度,提高其塑性变形能力.Mg的原子百分比低于5％时,在400K及以下的温度下拉伸,纳米线会发生晶化,由非晶转变为面心立方结构,应力是导致相变的重要因素.Mg的原子百分比高于5％时,在低温(100K、200K)和室温(300K)下拉伸,纳米线的塑性变形主要发生在断裂带,有明显的颈缩现象;而在400K、500K的温度下,纳米线的塑性变形能力显著提高.
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