Deformation-Induced Melt Migration and Related Attenuation in Texturally-Equilibrated Silicate Partial Melts

这项工作是一个实验研究的变形- 硅酸盐中的诱导熔体迁移和相关的弹性衰减 部分熔化 两相固-液聚集体（具有第一 达到适当的质地平衡）将受到 四点弯曲应力状态;固体热力学， 液体界面表明，在这种情况下， 应该在压缩下从试样侧面流出 拉伸主应力作用下试样侧的主应力 应力 这种熔体迁移被揭示为滞弹性的，完全- 两相试样的可恢复应变（ 在弯曲模式下特别好地“成像”）。 中的作用 弹性衰减中的变形诱导熔体传输将是 使用往复弯曲检查;衰减行为 将由应力-应变曲线中的滞后确定。

This work is an experimental investigation of deformation- induced melt migration and related elastic attenuation in silicate partial melts. Two-phase solid-liquid aggregates (having first attained appropriate textural equilibrium) will be subjected to a four-point flexure state of stress; the thermodynamics of solid- liquid interfaces suggests that, in this case, the melt phase should flow from that side of the specimen under a compressive principal stress to the specimen side under a tensile principal stress. This melt migration is revealed as a anelastic, fully- recoverable strain for the two-phase specimen (which is particularly well "imaged" in the flexure mode). The role of this deformation-induced melt transport in elastic attenuation will be examined using reciprocating flexure; the attenuation behavior will be determined by the hysteresis in stress-strain curves.