METALLURGICAL AND COMPOSITION ANALYSIS OF MELTED MARKS DUE TO ELECTRICAL FAILURES

Authors

  • Ying Wu Ministry of Public Security
  • Decai Han Ministry of Public Security

DOI:

https://doi.org/10.5755/j01.mech.18.2.1558

Keywords:

metallurgical and composition analysis, melted marks, electrical failures

Abstract

Electrical distribution wires with melted ends showing beaded, drop-shaped, and pointed shapes are frequently encountered after fires, which may be provide useful information on the cause and development of the fire. Various methods have been studied for identifying between primary melted marks (PMM), indicating arcing as the cause of the fire, and secondary melted marks (SMM), indicating arcing as a result of the fire. But in some major cases, PMM and SMM are difficultly identified just using one method. In this study, a correlation of such behavior with some macroscopic, the in-depth composition of carbon and oxygen quantitative analysis, the composition and the chemical state in the near-surface regions, and metallurgical analysis of PMM and SMM has been studied. As a result, the given fire cause is the integrative judgments of these methods.

DOI: http://dx.doi.org/10.5755/j01.mech.18.2.1558

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Published

2012-04-20

Issue

Vol. 18 No. 2 (2012)

Section

MECHANICAL TECHNOLOGIES

License

The copyright for the articles in this journal is retained by the author(s) with the first publication right granted to the journal. The journal is licensed under the Creative Commons Attribution License 4.0 (CC BY 4.0).