Burning Resistant Behavior and Mechanism of a Ti40 Alloy
Zhao Yongqing, Zhou Lian,
Deng Ju (Northwest Institute for Nonferrous Metal Research, Xi'an 710016)
Burning
resistant titanium alloys have been developing since 90s. However, burning resistant
mechanism is not clear. Both direct current simulation burning (DCSB) and metal liquid drop
methods were used to examine the burning resistant behavior. The reason why some titanium
alloys being not burned and its mechanism are analyzed tentatively. The results suggest that a
Ti40 alloy exhibits a good burning resistance because of its low melting point, high thermal
conductivity, low heat of oxidation and single stable beta structure. On the basis of above
analysis, a simple mathematical equation for burning resistant capacity is deduced. This
equation shows that burning resistant capacity also has a relation with experimental conditions
and the dimensions of sample. Nonburning mechanisms of fast heat dispersion and
suspending oxygen transfer are put forward.
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