TEM characterization of dislocations in TiB 2 particles after hypervelocity impact

Guo, Qiang; Li, J.F.; Hou, Lili; Sun, Dalin

doi:10.1016/j.micron.2014.06.007

Cited by 5 publications

(2 citation statements)

References 8 publications

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Section: Resultsmentioning

confidence: 99%

“…During the die forging, a large amount of dislocations could be activated in α grains and significant amount of dislocations with different Burgers vector slip in the same region. Therefore when different dislocations encountered with each other the dislocation reaction might occur and then formed the dislocation networks[16].Effect of microstructure on high cycle fatigue property. The high cycle fatigue life obtained for the two microstructures with different volume fraction of primary α was listed in Table2.…”

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Effect of Alpha Phase Characteristics on the High Cycle Fatigue Properties of Ti-6Al-4V Alloy

Kou

et al. 2016

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In this paper, high cycle fatigue (HCF) properties of Ti-6Al-4V alloys prepared by different forging processes have been investigated. Optical microscopy (OM) and Transmission electron microscopy (TEM) were used to characterize microstructure, and the fatigue fracture micromechanisms were analyzed. Fracture surfaces of specimens were observed by scanning electron microscopy (SEM) to identify the macroscopic fracture mode. It was found that die forging at high temperature would increase the proportion of low angle grain boundary in equiaxed primary α phase and lead to lamella secondary α coarsen with the appearance of dislocation networks, which would make the HCF properties decline. Besides, it showed that the HCF properties increase with increasing the volume fraction of primary α.

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Section: Resultsmentioning

confidence: 99%

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confidence: 99%