Microstructure evolution in the high temperature compression of Ti-5.6Al-4.8Sn-2.0Zr alloy

Li, Miaoquan; Luo, Jiao; Pan, Hongsi

doi:10.1007/s12598-010-0163-7

Cited by 6 publications

(2 citation statements)

References 11 publications

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“…When four cycles of MDIF were performed, a homogeneous equiaxed grained microstructure with an average grain size of 0.14 µm was achieved. This is quite consistent with the investigation results on TC4 alloy by Li et al [22].…”

Section: Microstructure Of Specimens After Four Cycles Of Mdifsupporting

confidence: 94%

Effect of Multidirectional Isothermal Forging on Microstructure and Mechanical Properties in Ti-6Al-4V Alloy

Yang

Fan

et al. 2022

Materials

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In the present work, the microstructure and mechanical properties of Ti-6Al-4V alloy during multidirectional isothermal forging (MDIF) were systematically investigated. The evolution of the microstructure and texture of Ti-6Al-4V alloy during MDIF was studied using TEM and electron backscattered diffraction (EBSD). The experiment results showed that the grain size decreased with the increase in cumulative strain, especially in the easy deformation zone. After four deformation cycles, a homogeneous equiaxed grained microstructure with an average grain size of 0.14 μm was achieved. The texture changes of the alloy were studied in detail. After one cycle of MDIF, the texture was mainly composed of (0002) [01 10], and the Euler angles were (8°, 30°, 30°). The density of texture decreased with the increase in loading cycle, but the dispersion of texture increased. After four cycles of MDIF, the non-basal texture (1010) <1102> texture was observed, and the Euler angles were (82°, 33°, 0°). The highest achieved mechanical properties for Ti-6Al-4V alloy in the MDIF condition were a yield strength 900 MPa, ultimate tensile strength of 921 MPa, and an elongation of 12.1% at room temperature. The increase in MDIF cycles improved the hardness of the alloy. The significant improvement in mechanical properties was attributed to the ultrafine-grained microstructure.

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Section: Microstructure Of Specimens After Four Cycles Of Mdifsupporting

confidence: 94%

Effect of Multidirectional Isothermal Forging on Microstructure and Mechanical Properties in Ti-6Al-4V Alloy

Yang

Fan

et al. 2022

Materials

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“…The elongated a grain is perpendicular to the compression axis direction and has an obviously oriented characteristic. This is a typical DRV structure, implying that the dominant softening mechanism is DRV at this strain rate [17]. Additionally, the microstructure has a fine b transformed matrix and the grain boundaries of b phase are distinct.…”

Section: Effect Of Deformation Temperaturementioning

confidence: 78%

Quantitative analysis on microstructure evolution of Ti-6Al-2Zr-2Sn-2Mo-1.5Cr-2Nb alloy during isothermal compression

Gao

et al. 2015

Rare Met.

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Isothermal compression tests of Ti-6Al-2Zr-2Sn-2Mo-1.5Cr-2Nb alloy were conducted at a Gleeble-1500 simulator in deformation temperature range of 1103-1243 K, strain rate range of 0.01-5.00 s -1 and height reduction range of 50 %-70 %. The effects of processing parameters on morphology, grain size and contents of a and b phases were discussed based on the quantitative microstructure examination, and the detailed explanation was shown. The results show that b transformed matrix will obviously grow up at higher deformation temperature or lower strain rate because of low grain growth activation energies. The content of a phase will decrease at higher deformation temperature or higher strain rate due to the phase transformation. Some elongated a or b grains exist at higher strain rate, implying that the dominant softening mechanism is dynamic recovery. The effect of height reduction on b transformed matrix is negligible, but the height reduction has some effects on the morphology of primary a phase.

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Modeling of grain size in isothermal compression of Ti-6Al-4V alloy using fuzzy neural network

Luo

2011

Rare Metals

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Isothermal compression of Ti-6Al-4V alloy was conducted in the deformation temperature range of 1093-1303 K, the strain rates of 0.001, 0.01, 0.1, 1.0, and 10.0 s −1 , and the height reductions of 20%-60% with an interval of 10%. After compression, the effect of the processing parameters including deformation temperature, strain rate, and height reduction on the flow stress and the microstructure was investigated. The grain size of primary α phase was measured using an OLYMPUS PMG3 microscope with the quantitative metallography SISC IAS V8.0 image analysis software. A model of grain size in isothermal compression of Ti-6Al-4V alloy was developed using fuzzy neural network (FNN) with back-propagation (BP) learning algorithm. The maximum difference and the average difference between the predicted and the experimental grain sizes of primary α phase are 13.31% and 7.62% for the sampled data, and 16.48% and 6.97% for the non-sampled data, respectively. It can be concluded that the present model with high prediction precision can be used to predict the grain size in isothermal compression of Ti-6Al-4V alloy.

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Microstructure evolution in the high temperature compression of Ti-5.6Al-4.8Sn-2.0Zr alloy

Cited by 6 publications

References 11 publications

Effect of Multidirectional Isothermal Forging on Microstructure and Mechanical Properties in Ti-6Al-4V Alloy

Effect of Multidirectional Isothermal Forging on Microstructure and Mechanical Properties in Ti-6Al-4V Alloy

Quantitative analysis on microstructure evolution of Ti-6Al-2Zr-2Sn-2Mo-1.5Cr-2Nb alloy during isothermal compression

Modeling of grain size in isothermal compression of Ti-6Al-4V alloy using fuzzy neural network

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