Tic/Zrc Adding Influence Titanium Zirconium Molybdenum Alloy’S High Temperature Fracture Mechanism
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- Category: Molybdenum knowledge
- Published on 21 August 2015
- Written by yiping
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After observing the alloy which add small amount of TiC/ZrC and carbide-free TZM alloy’s high temperature fracture mechanism found the tensile fracture of carbide-free titanium zirconium molybdenum alloy exhibit typical intergranular brittle fracture characteristics. And when the test temperature at 800 ℃, its tensile fracture is the high temperature fracture mode which mix with transgranular cleavage fracture and dimple fracture temperature. On the other hand, observing 0.4% TiC/ZrC added alloy at 800℃ test temperature tensile fracture manifested mainly dimple fracture. What's more, there are large number of parabolic tear dimple exists 0.4% TiC/ZrC added alloy. Besides the dimples is deeper and has larger size while showing good plasticity and toughness.
Dimple is the main features of metal fracture toughness and the formation of it can be divided into microvoids nucleation, microvoids growth and microvoids aggregation. Microvoids priority generates around in the dispersed second phase particles and to grow to form the dimples. Added small amount of carbide in TZM alloy is conducive to promoting the dimple forming in high-temperature tensile process.
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