论文标题
粗糙的钻石砧：ZR中稳定的微观结构，屈服表面和转化动力学
Rough diamond anvils: Steady microstructure, yield surface, and transformation kinetics in Zr
论文作者
论文摘要
对钻石砧高压下的塑性流量和应变诱导的相变（PT）的研究对于材料和地球物理很重要。我们引入粗糙的钻石砧，并将其应用于ZR，这大大改变了塑料流，微结构和PT。到达多个稳定的微观结构，与压力，塑性应变和应变路径无关。达到剪切中的屈服强度等于屈服强度的最大摩擦。这允许确定屈服强度的压力依赖性，并证明了omega-ZR的行为与PT之后的完全塑性，各向同性和应变路径无关。确定了α-Omega PT的最小压力。应变诱导的PT的动力学取决于塑性应变和时间。 PT期间，Omega-ZR中的结晶石大小和位错密度仅取决于omega-ZR的体积分数。
Study of the plastic flow and strain-induced phase transformations (PTs) under high pressure with diamond anvils is important for material and geophysics. We introduce rough diamond anvils and apply them to Zr, which drastically change the plastic flow, microstructure, and PTs. Multiple steady microstructures independent of pressure, plastic strain, and strain path are reached. Maximum friction equal to the yield strength in shear is achieved. This allows determination of the pressure-dependence of the yield strength and proves that omega-Zr behaves like perfectly plastic, isotropic, and strain path-independent immediately after PT. Record minimum pressure for alpha-omega PT was identified. Kinetics of strain-induced PT depends on plastic strain and time. Crystallite size and dislocation density in omega-Zr during PT depend solely on the volume fraction of omega-Zr.
