Applicability Evaluation of Surface and Sub-Surface Defects for Railway Wheel Material Using Induced Alternating...

Area of Science:

• Materials Science
• Mechanical Engineering
• Non-Destructive Testing

Background:

• Catastrophic railway wheelset failures often stem from fatigue cracks on the wheel tread or inner surface.
• Mandatory regular inspections are crucial for railway safety, utilizing methods like ultrasonic testing, acoustic emissions, and eddy current testing.
• Conventional non-destructive inspection systems frequently fail to detect developing surface and subsurface defects in railway wheels.

Purpose of the Study:

• To introduce and evaluate a new technique for detecting surface and subsurface defects in railway wheel material.
• To assess the efficacy of alternating current (AC) electromagnetic field distribution in identifying defects.

Main Methods:

• Application of a novel alternating current (AC) electromagnetic field technique to railway wheel specimens.
• Analysis of the AC electromagnetic field distribution for defect detection.

Main Results:

• The new technique successfully detected surface and subsurface defects in railway wheel specimens.
• Surface cracks with depths as small as 0.5 mm were identified using this method.
• The technique demonstrated superior defect detection capabilities compared to conventional methods.

Conclusions:

• The developed AC electromagnetic field technique offers a promising advancement for detecting critical defects in railway wheelsets.
• This method enhances the reliability of non-destructive inspection for railway components, potentially preventing catastrophic failures.