Deformation twinning and residual stress in calcite studied with synchrotron polychromatic X-ray microdiffraction

被引：19

作者：

Chen, Kai ^{[1
]}

Kunz, Martin ^{[2
]}

Tamura, Nobumichi ^{[2
]}

Wenk, Hans-Rudolf ^{[1
]}

机构：

[1] Univ Calif Berkeley, Dept Earth & Planetary Sci, Berkeley, CA 94720 USA

[2] Univ Calif Berkeley, Lawrence Berkeley Lab, Adv Light Source, Berkeley, CA 94720 USA

来源：

PHYSICS AND CHEMISTRY OF MINERALS | 2011年 / 38卷 / 06期

基金：

美国国家科学基金会;

关键词：

Calcite; Twinning; Residual stress; Laue microdiffraction; NUMERICAL DYNAMIC ANALYSIS; DIFFERENTIAL STRESS; E-TWINS; LAMELLAE; STRAIN; DOLOMITE; MARKERS; QUARTZ;

D O I：

10.1007/s00269-011-0422-7

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Microstructures of deformed calcite in marble from the Bergell Alps are studied by using a microfocused polychromatic synchrotron X-ray beam. The high spatial resolution, together with orientation and strain resolutions, reveals twin plane orientation, multiple twin lamellae, and strain distributions associated with the twins. Single and multiple mechanical twins on e - {01 (1) over bar8} systems are confirmed. Residual stresses are derived from the strain tensor that is derived from Laue diffraction patterns. Average lattice strains from several hundred to over one thousand microstrains are detected in a deformed marble from the Bergell Alps. Such strains suggest 60-120 MPa residual stresses. A detailed study of strain components shows that shear stresses on twin planes are completely released.

引用

页码：491 / 500

页数：10

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