Abstract：
:Material and failure analysis techniques are key tools for determining causation in case of explosive and bursting accident result from material and process defect of product in the field of forensic science. The boiler rupture generated by defect of the welding division, corrosion, overheating and degradation of the material have devastating power. If weak division of boiler burner is fractured by internal pressure, saturated vapor and water is vaporized suddenly. At that time, volume of the saturated vapor and water increases up to thousands of volume. This failure of boiler burner can lead to a fatal disaster. In order to prevent an explosion and of the boiler, it is critical to introduce a systematic investigation and prevention measures in advance. In this research, the cause of boiler failure is investigated through forensic engineering method. Specifically, the failure mechanism will be identified by fractography using scanning electron microscopes (SEM) and Optical Microscopes (OM) and mechanical characterizations. This paper presents a failure analysis of household welding joints for the water tank of a household boiler burner. Visual inspection was performed to find out the characteristics of the fracture of the as-received material. Also, the micro-structural changes such as grain growth and carbide coarsening were examined by optical microscope. Detailed studies of fracture surfaces were made to find out the crack propagation on the weld joint of a boiler burner. It was concluded that the rupture may be caused by overheating induced by insufficient water on the boiler, and it could be accelerated by the metal temperature increase.
journal_name
Forensic Sci Intjournal_title
Forensic science internationalauthors
Kim ESdoi
10.1016/j.forsciint.2017.07.036subject
Has Abstractpub_date
2017-09-01 00:00:00pages
e1-e7eissn
0379-0738issn
1872-6283pii
S0379-0738(17)30295-5journal_volume
278pub_type
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pub_type： 杂志文章,评审
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pub_type： 杂志文章
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journal_title：Forensic science international
pub_type： 杂志文章
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journal_title：Forensic science international
pub_type： 杂志文章
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doi：10.1016/j.forsciint.2012.12.019
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pub_type： 杂志文章
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