Slip-system and EBSD analysis on compressively deformed fine-grained polycrystalline olivine
Slip-system and EBSD analysis on compressively deformed fine-grained polycrystalline olivine
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DOI：
10.1144/sp360.13
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发表时间：
2011-01-01
期刊：
影响因子：
--
通讯作者：
Jackson, I.
中科院分区：
文献类型：
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作者：
Farla, R. J. M.;Gerald, J. D. Fitz;Jackson, I.
两个合成的压缩变形橄榄石聚集体，来自实验溶液-凝胶化（溶胶-凝胶）和天然圣卡洛斯前体，以确定位错密度如何与施密德因素在橄榄石滑移进行滑移系统分析。用电子背散射衍射法测定了单个晶粒的取向。使用装饰位错，晶粒人口分为高与低位错密度的子集。对Schmid因子的择优取向和分布的分析表明，在San卡洛斯晶粒中，Schmid因子与位错密度、（010）[100]上的滑移相关性较弱，而在溶胶-凝胶材料中，Schmid因子与位错密度、（001）[100]上的滑移相关性较弱，且两者都存在多重滑移或应力不均匀性。
A slip-system analysis was performed on two synthetic compressively deformed olivine aggregates, derived from experimental solution-gelation (sol-gel) and natural San Carlos precursors to determine how dislocation density relates to Schmid factor for slip in olivine. Individual grain orientations were measured with electron backscatter diffraction. Using decorated dislocations, grain populations were separated into subsets of high versus low dislocation density. Analysis of preferred orientations and distributions of Schmid factors suggests that there is only weak correlation between Schmid factor and dislocation density, slip on (010)[100] in San Carlos grains but (001)[100] in sol-gel material, with multiple slip or stress heterogeneity in both.