Development and Performing of a Method of Comparative Flammability Tests of Magnesium Alloys

Sergey Barbot’Ko,Oleg Volniy,Andrei Sivenkov,Marina Gravit,Aleksandr Leonov,Nikolai Trofimov,Y Klochkov

doi:10.1051/e3sconf/202132002003

Abstract

Magnesium alloys find their application in aviation technology for manufacturing of structural elements in uninhabited compartments and outside areas with increased fire hazard. At the stage of development of magnesium alloys with low fire hazard, it is advisable to perform comparative tests on relatively small samples so that all test equipment can be located in a laboratory. A method has been developed for conducting flammability tests when exposed to a flame with a temperature of 1,100 ° C for samples of magnesium alloys of small sizes. Comparative tests of two magnesium alloys - the standard ML5 and the new experimental one with increased fire safety - have been carried out. Significant differences have been established in the flammability and extinguishing ability of various grades of magnesium alloys - it is shown that the samples of the experimental magnesium alloy, in comparison with the ML5 alloy, are more difficult to ignite and in most cases can self-extinguish rapidly, while the weight loss of the sample practically does not occur.

Highlights

IntroductionIn comparison with aluminum alloys, have a lower density and better physical and mechanical characteristics
Magnesium alloys, in comparison with aluminum alloys, have a lower density and better physical and mechanical characteristics
When replacing parts made of aluminum alloys with those made of magnesium alloys, weight saving reaches 25 - 30%

Summary

Introduction

In comparison with aluminum alloys, have a lower density and better physical and mechanical characteristics. The developed method of fire testing of samples of magnesium alloys for the manufacturing of structural elements of seats, set forth in section 25 of the current Handbook on methods of fire testing of aviation materials, requires the use of relatively large samples of a powerful kerosene burner. In the technique proposed by Airbus, there is no direct contact between flame and the test sample (the sample is placed on a steel sheet heated from below by the flame of a gas burner) In this regard, the task was set to develop a test procedure for small-sized samples when exposed to a flame with a temperature of 1100 °C. "Fundamental-oriented research, qualification of materials and non-destructive testing" and 8.4 "High-strength corrosion-resistant weldable magnesium and cast aluminum alloys for new generation aerospace products." ("Strategic directions for the development of materials and technologies for their processing for the period up to 2030") [22, 23]

Materials and methods

Results and discussion

Conclusion