Arc-Flash Bead Metallurgy
Definition
Forensic metallurgical analysis of conductor wire segments to distinguish between arc-flash ignition (producing globular fusion beads) and mechanical fracture followed by fire contact (producing a different oxidation signature). Central to the Black Saturday Kilmore East power-line liability finding.
Related terms
- ACM-PE Cladding
- Aluminium composite material with a polyethylene core (Reynobond PE). The combustible cladding type responsible for external fire spread at Grenfell Tower. Now...
- BS 8414-1
- British Standard for external wall systems: fire performance test for facade assemblies. The large-scale test that ACM-PE cladding, as installed at Grenfell...
- Char Depth
- The depth of carbonisation in timber or wood products, used in post-fire investigation to estimate fire duration and intensity at a point....
- Fire Dynamics Simulator (FDS)
- Computational fluid dynamics software developed by NIST that models fire-driven fluid flow and heat transfer. Used in landmark investigations including Station Nightclub...
- Flashover
- The near-simultaneous ignition of all exposed combustible surfaces in a compartment, occurring when the upper gas layer reaches approximately 600°C and radiative...
- Heat Release Rate (HRR)
- The rate at which a burning material releases energy, measured in kilowatts (kW) or megawatts (MW). Measured by cone calorimetry for material...
- Negative Corpus
- The discredited practice of concluding incendiary fire cause by eliminating all identifiable accidental causes without positive physical evidence of intentional fire-setting. NFPA...
- NFPA 921
- US National Fire Protection Association Guide for Fire and Explosion Investigations. The internationally accepted methodology Indian fire investigators and SFSL fire divisions...
- No-Objection Certificate (NOC)
- The fire-safety clearance issued by Indian municipal fire brigades as a prerequisite for operating certain categories of public premises. Absence of a...
Explained in
- Major Arson Casework: Station Nightclub, Grenfell, Uphaar, Kamala MillsForensic metallurgical analysis of conductor wire segments to distinguish between arc-flash ignition (producing globular fusion beads) and mechanical fracture...