Thermo Scientific ARL iSpark Plus Optical Emission Spectrometer

Significance of the Topic

Ultra-fast inclusion analysis is critical for ensuring the structural integrity and performance of steel and non-ferrous metal products. Detecting microscopic non-metallic inclusions helps manufacturers prevent defects, reduce scrap, and maintain consistent quality in high-throughput production environments.

Objectives and Article Overview

This document presents Thermo Scientific’s Spark-DAT inclusion analysis solution implemented on the ARL iSpark Plus Optical Emission Spectrometer. It reviews the combined elemental and inclusion analysis capabilities, outlines available analytical methods, introduces software modules, and describes application support for steel, aluminum, and other alloys.

Methodology and Instrumentation

The ARL iSpark Plus uses spark optical emission spectroscopy to ablate sample material and measure emitted light signatures. Spark-DAT algorithms process individual spark signals to characterize inclusion chemistry, size distribution, and volume fraction. The OXSAS software controls the spectrometer, handles raw data, applies statistical algorithms, and exports results to LIMS or SPC systems. Optional modules include:

• Spark Explorer for interactive signal visualization and threshold adjustment
• Inclusions Report for detailed summary documents
• Ternary Diagrams for compositional mapping of multicomponent inclusions
• SPC connectivity for online monitoring and trend detection

Main Results and Discussion

Spark-DAT delivers combined elemental and inclusion analyses in a single run with no extension of cycle time, enabling hundreds of samples per day. Three methods are available:

• Basic Inclusion Analysis for low-alloy steels (qualitative detection of Al, Ca, Mg, S inclusions)
• Standard Inclusion Analysis for all metals (qualitative data on a wide range of inclusions)
• Advanced Inclusion Analysis for low-alloy steels (quantitative size distribution, inclusion volume fraction, oxygen content)

OXSAS processes large datasets without limits, ensuring high statistical reliability and customizable reporting.

Benefits and Practical Applications

• Concurrent elemental and inclusion analysis reduces laboratory turnaround time.
• High sample throughput supports continuous quality monitoring.
• Customizable statistical alerts and reports help minimize rework and scrap.
• Integration with automated sample handling and information systems streamlines production workflows.

Future Trends and Potential Applications

Emerging directions include integrating machine learning for predictive inclusion control, expanding methods to new alloy families, leveraging cloud-based data sharing, and enhancing remote diagnostics. Advanced data analytics and real-time visualization will further embed inclusion analysis within Industry 4.0 and smart manufacturing frameworks.

Conclusion

The ARL iSpark Plus combined with Spark-DAT algorithms offers a powerful, high-speed platform for simultaneous elemental and inclusion analysis across diverse metal grades. With modular software, flexible reporting, and seamless integration, it delivers critical insights that drive product quality and process optimization.

References

1. Thermo Fisher Scientific. Thermo Scientific ARL iSpark Plus Optical Emission Spectrometer brochure. 2023.