Related Experiment Video
Updated: Mar 12, 2026
06:54
Characterization of Nanocrystal Size Distribution using Raman Spectroscopy with a Multi-particle Phonon Confinement Model
Published on: August 22, 2015
14.7K
Mapping the Residual Stress Distribution in Polycrystalline Quartz Tiger's Eye Using Raman Spectroscopy
Genevieve C Kidman1,2, Ashkan Salamat1, Brian M Patterson2
1Geoscience, University of Nevada Las Vegas, Las Vegas, Nevada, USA.
Small Methods
|March 11, 2026
Summary
This study maps grain-scale residual stresses in Tiger's Eye quartz using Raman spectroscopy. The technique reveals heterogeneous stress distributions, offering insights into polycrystalline material behavior.
Area of Science:
- Materials Science
- Geology
- Spectroscopy
Background:
- Understanding stress distribution in polycrystalline materials is crucial for analyzing crystallite interactions.
- Raman spectroscopy is sensitive to stress-induced wavenumber shifts in crystalline materials undergoing elastic strain.
Purpose of the Study:
- To develop and validate a technique for experimentally measuring grain-scale residual stresses in polycrystalline quartz.
- To create a residual stress map of Tiger's Eye quartz and characterize its stress distribution.
Main Methods:
- Utilized spatially resolved Raman spectroscopy to measure residual stresses at the grain scale.
- Validated the technique through evaluation of the resulting stress map and measurement accuracy.
- Characterized geometric features of iron oxide inclusions within the quartz.
Main Results:
- Generated a residual stress map of Tiger's Eye quartz exhibiting heterogeneous stress patterns with inter- and intra-granular detail.
- Observed stress distribution characteristics similar to other polycrystalline materials.
- Measured stress magnitudes consistent with previously reported values for polycrystalline quartz.
Conclusions:
- The developed Raman spectroscopy technique accurately maps grain-scale residual stresses in Tiger's Eye quartz.
- The study provides a detailed understanding of the heterogeneous stress state within the polycrystal.
- New insights into the geometric nature of iron oxide inclusions in Tiger's Eye quartz were obtained.
Related Concept Videos
01:20Raman Spectroscopy: Overview
2.1K
The underlying principle of Raman spectroscopy is based on the interaction between light and matter, specifically molecules' inelastic scattering of photons. When a monochromatic beam of light, typically from a laser source, interacts with a sample, most scattered light has the same frequency as the incident light. This is known as Rayleigh scattering.
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
However, a small fraction of the scattered light exhibits a frequency shift due to the exchange of energy between the incident photons and...
2.1K
01:26Raman Spectroscopy Instrumentation: Overview
1.5K
A conventional Raman spectrophotometer includes a laser source, a sample holding system, a wavelength selector, and a detector.
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
The monochromatic laser source, typically using visible or near-infrared radiation, generates a highly focused beam of light. This light interacts with the molecules of the sample, scattering some of the light. Liquid and gaseous samples are usually tested in ordinary glass capillaries, while solids can be analyzed as powders packed in capillaries or as potassium...
1.5K
01:26Residual Stresses
735
Residual stresses reside in a structure even after removing the original stress inducer. This phenomenon often arises from varied plastic deformations across different parts of a structure. Consider a rod stretched beyond its yield point. It will not regain its original length due to permanent deformation. Even after load removal, the rod does not entirely lose stress because of uneven plastic deformations, resulting in residual stresses. The computation of these stresses in structures is...
735
01:20Elastic Strain Energy for Shearing Stresses
576
As discussed in previous lessons, strain energy in a material is the energy stored when it is elastically deformed, a concept crucial in materials science and mechanical engineering. This energy results from the internal work done against the cohesive forces within the material. When a material undergoes shearing stress and corresponding shearing strain, the strain energy density, which is the energy stored per unit volume, is calculated. Within the elastic limit, where the stress is...
576
01:24Stress-Strain Diagram - Brittle Materials
4.7K
Brittle materials, including glass, cast iron, and stone, exhibit unique characteristics. They fracture without considerable change in their elongation rate, indicating that their breaking and ultimate strength are equivalent. Such materials also show lower strain levels at the point of rupture. The failure in brittle materials predominantly results from normal stresses, as evidenced by the rupture created along a surface perpendicular to the applied load. These materials do not display...
4.7K
01:18Residual Stresses in Bending
634
In the study of elastoplastic members subjected to bending moments, understanding the loading and unloading phases is crucial for assessing material behavior and structural integrity. During the loading phase, as the bending moment increases, the material initially responds elastically, adhering to Hooke's Law, where stress is directly proportional to strain. When the load exceeds the yield strength, plastic deformation occurs, resulting in permanent strain and deformation that remains even...
634