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

这项工作是对硅酸盐部分熔体中形变诱导的熔体迁移和相关的弹性衰减的实验研究。两相固-液集合体(首先达到适当的织构平衡)将受到四点弯曲应力状态的影响；固-液界面的热力学表明，在这种情况下，熔体相应该从压缩主应力下的试件一侧流动到拉伸主应力下的试件一侧。这种熔体迁移被揭示为两相样品的滞弹性、完全可恢复的应变(这在弯曲模式下被特别好地“成像”)。这种由变形引起的熔体传输在弹性衰减中的作用将通过往复弯曲来检验；衰减行为将由应力-应变曲线中的滞后来确定。

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.