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Deformation and failure in extreme regimes by high-energy pulsed lasers: A review

机译：高能脉冲激光在极端情况下的变形和破坏：综述

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摘要

The use of high-power pulsed lasers to probe the response of materials at pressures of hundreds of GPa up to several TPa, time durations of nanoseconds, and strain rates of 10~6-10~(10) s~(-1) is revealing novel mechanisms of plastic deformation, phase transformations, and even amorphization. This unique experimental tool, aided by advanced diagnostics, analysis, and characterization, allows us to explore these new regimes that simulate those encountered in the interiors of planets. Fundamental Materials Science questions such as dislocation velocity regimes, the transition between thermally-activated and phonon drag regimes, the slip-twinning transition, the | ultimate tensile strength of metals, the dislocation mechanisms of void growth are being answered through this powerful tool. In parallel with experiments, molecular dynamics simulations provide modeling and visualization at comparable strain rates (10~8-10~(10) s~(-1)) and time durations (hundreds of picoseconds). This powerful synergy j is illustrated in our past and current work, using representative face-centered cubic (fcc) copper, body-centered i cubic (bcc) tantalum and diamond cubic silicon as model structures.
机译：使用高功率脉冲激光来探测材料在数百GPa到几Tpa的压力，纳秒的持续时间以及10〜6-10〜（10）s〜（-1）的应变速率下的响应是揭示了塑性变形，相变甚至非晶化的新机制。这种独特的实验工具，借助先进的诊断，分析和表征，使我们能够探索这些新的机制，以模拟在行星内部遇到的机制。基础材料科学问题，例如位错速度机制，热激活和声子阻力机制之间的过渡，孪生孪生相移，通过这种强大的工具，可以解决金属的极限拉伸强度，空洞生长的位错机制。与实验并行，分子动力学模拟提供了可比的应变速率（10〜8-10〜（10）s〜（-1））和持续时间（数百皮秒）的建模和可视化。在我们过去和当前的工作中，使用具有代表性的面心立方（fcc）铜，体心i立方（bcc）钽和金刚石立方硅作为模型结构来说明这种强大的协同作用j。

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