The effects of lamellar features on the fracture toughness of Ti-17 titanium alloy

Shi, Xiaohui; Zeng, Weidong; Zhao, Qinyang

doi:10.1016/j.msea.2015.04.021

Cited by 72 publications

(22 citation statements)

References 31 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…It is evident that fracture surfaces of both were covered with dense dimples. Crack propagated in ductile mode, which was also found in Reference [7]. However, some big differences between the two microstructures were observed.…”

Section: Fracture Toughnesssupporting

confidence: 77%

“…On the other hand, the fracture surface of the lamellar microstructure is characterized by secondary cracks and a big fracture step, which increases the toughness. Previous investigations found that there was a positive correlation between the crack path length and the fracture toughness [7,19,20]. Therefore, the crack path geometry has to be taken into account as a parameter responsible for the different fracture toughness.…”

Section: Fracture Toughnessmentioning

confidence: 99%

“…Take Ti-5Al-2Sn-2Zr-4Mo-4Cr (Ti17), for example: due to its higher strength level as compared to the typical α + β Ti-6Al-4V alloy [6][7][8], the alloy has been favored as a jet engine compressor and has attracted more attention in recent times [6][7][8][9][10][11][12][13][14][15][16]. Luo et al conducted isothermal compression tests on Ti17 alloy and observed the microstructural evolution [11].…”

Section: Introductionmentioning

confidence: 99%

See 2 more Smart Citations

Effect of Microstructure on Fracture Toughness and Fatigue Crack Growth Behavior of Ti17 Alloy

Rong

Wang³

et al. 2016

Metals

View full text Add to dashboard Cite

Ti-5Al-2Sn-2Zr-4Mo-4Cr (Ti17) is used extensively in turbine engines, where fracture toughness and fatigue crack growth (FCG) resistance are important properties. However, most research on the alloy was mainly focused on deformation behavior and microstructural evolution, and there have been few studies to examine the effect of microstructure on the properties. Accordingly, the present work studied the influences of the microstructure types (bimodal and lamellar) on the mechanical properties of Ti17 alloy, including fracture toughness, FCG resistance and tensile property. In addition, the fracture modes associated with different microstructures were also analyzed via the observation of the fracture surface. The results found that the lamellar microstructure had a much higher fracture toughness and superior resistance to FCG. These results were discussed in terms of the tortuous crack path and the intrinsic microstructural contributions.

show abstract

Section: Fracture Toughnesssupporting

confidence: 77%

Section: Fracture Toughnessmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Effect of Microstructure on Fracture Toughness and Fatigue Crack Growth Behavior of Ti17 Alloy

Rong

Wang³

et al. 2016

Metals

View full text Add to dashboard Cite

show abstract

“…The crystal defect that serves as heterogeneous nucleation sites for the content of second a phase increases enormously with the increase in deformation degree [18,20,21], leading to the second a phase of three morphologies. When the deformation degree is up to 60 %, the microstructure is composed of fine equiaxed a phase, a small amount of short rod-like a phases and intergranular b, and the long rod-like a structure almost disappears, which are illustrated in Fig.…”

Section: Effect Of Deformation Degree On Microstructurementioning

confidence: 99%

“…Comparing the deformation degree of 50 % with that of 60 %, the grain size of second a phase increases. The larger deformation degree may result in the shear of lamellar a structure, and a large number of dislocations along the shear plane induce the globularization of lamellar a structure [20,21]. Therefore, the content of long rod-like a structure decreases with the increase in deformation degree.…”

Section: Effect Of Deformation Degree On Microstructurementioning

confidence: 99%

Microstructure evolution of a new near-β titanium alloy: Ti555211 during high-temperature deformation

Feng

2015

Rare Met.

View full text Add to dashboard Cite

The isothermal compression testing of Ti555211 titanium alloys was carried out at deformation temperatures from 750 to 950°C in 50°C intervals, with strain rate of 0.001-1.000 s -1 and height reduction of 20 %-60 %. The effect of processing parameters (deformation temperature, strain rate and deformation degree) on the microstructure evolution and the microstructure variables was investigated. The results show that the content of primary a phase decreases with the increase in deformation temperature. The effect of strain rate on microstructure variables of isothermally compressed Ti555211 alloy is mainly dependent on the deformation temperature. The fine second a phase partly transforms to b phase due to the deformation heat effect at the high strain rate. a phase becomes globular with temperature increasing and strain rate decreasing. In contrast, a phase is refined with temperature decreasing and strain rate increasing. The deformation degree has a little influence on the grain size and the morphology of primary a phase, but the effect of deformation degree on the morphology of second a phase is significant. The larger deformation degree is in favor of the globularization of lamellar a structure.

show abstract

Tensile performance and impact toughness of Ti-55531 alloy with multilevel lamellar microstructure

et al. 2021

View full text Add to dashboard Cite

The effects of lamellar features on the fracture toughness of Ti-17 titanium alloy

Cited by 72 publications

References 31 publications

Effect of Microstructure on Fracture Toughness and Fatigue Crack Growth Behavior of Ti17 Alloy

Effect of Microstructure on Fracture Toughness and Fatigue Crack Growth Behavior of Ti17 Alloy

Microstructure evolution of a new near-β titanium alloy: Ti555211 during high-temperature deformation

Tensile performance and impact toughness of Ti-55531 alloy with multilevel lamellar microstructure

Contact Info

Product

Resources

About