K_IC Crack Measurement

Advanced Crack Detection and Measurement Under Load

The KIC module enables precise detection and evaluation of cracks formed during hardness testing, even under applied load conditions.

• Automated crack detection from indentation corners
• Measurement of crack lengths with high accuracy
• Support for both Palmqvist and Median/Radial crack models
• Consistent results independent of operator interpretation

This allows users to perform detailed fracture analysis with confidence and repeatability.

Standards-Compliant KIC Testing

The software is fully configured to perform fracture toughness calculations in accordance with internationally recognized standards, ensuring reliable and comparable results.

• ISO 28079 – Palmqvist crack method for fracture toughness evaluation
• ASTM E1820 – Standard test methods for fracture toughness measurement

By embedding these standards directly into the software, the system ensures that all measurements, calculations, and outputs align with required testing methodologies.

Embedded KIC Calculations for Accurate Results

All required KIC fracture toughness calculations are fully integrated within the software, eliminating manual data processing and ensuring consistent application of formulas.

For indentation-based fracture toughness testing, commonly applied models include:

Palmqvist Crack Model (ISO 28079)

Where:

• P = applied test force
• Σl = total crack length from indentation corners

Median / Radial Crack Model

Where:

• E = Young’s modulus
• H = hardness value
• P = applied load
• c = crack length from center of indent
• χ = material constant

These calculations are automatically executed by the software, ensuring:

• Accurate and repeatable KIC values
• Elimination of manual calculation errors
• Full alignment with ISO and ASTM methodologies
• Consistent results across multiple operators and test setups

Customized Reporting Aligned with Industry Standards

The KIC module includes advanced reporting tools designed to match the output requirements of ISO and ASTM standards.

• Pre-configured report templates for KIC testing
• Inclusion of crack measurements, hardness values, and calculated results
• Clear visualization of indentation and crack geometry
• Exportable reports for documentation, audits, and research

This ensures that all fracture toughness results are presented in a clear, standardized, and audit-ready format.

Automated vs Traditional Fracture Toughness Testing

Traditional fracture toughness testing methods—such as compact tension (CT) or single-edge notch bending (SENB) tests—are often complex, time-consuming, and require specialized sample preparation.

The KIC module provides a more efficient alternative:

Traditional Methods (ASTM E1820 – Mechanical Testing)

• Requires large, precisely machined specimens
• Time-intensive preparation and testing procedures
• Dedicated equipment separate from hardness testing
• Higher operational costs

Indentation-Based KIC Testing with IMPRESSIONS™

• Performed directly on standard hardness testing samples
• Minimal sample preparation required
• Fully integrated into Vickers hardness testing workflow
• Faster results with automated crack detection and calculation
• Ideal for high throughput testing and material screening

This makes indentation-based KIC testing a highly efficient solution for both research and industrial applications.

Applications of KIC Fracture Toughness Testing

KIC crack measurement is critical in industries where understanding material performance under stress is essential.

• Aerospace – Evaluation of fatigue resistance in high-performance alloys
• Automotive – Fracture analysis of safety-critical components
• Tooling and Manufacturing – Assessment of wear resistance and durability
• Energy Sector – Materials exposed to extreme stress, pressure, and temperature
• Research and Development – Advanced studies in fracture mechanics and material innovation

Reliable and Reproducible Fracture Analysis

By integrating crack detection, standardized calculations, and automated reporting, the KIC module transforms complex fracture toughness testing into a streamlined and repeatable process.

The result is a powerful, efficient, and scalable solution for fracture toughness testing, crack growth analysis, and advanced material characterization—all within a single hardness testing platform.