Superplastic Behavior of a Ti-Al-Mn Alloy

Yogesha, B.; Bhattacharya, S. S.

doi:10.1515/ijmsp.2008.9.1-2.81

Cited by 7 publications

(4 citation statements)

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“…Its chemical composition is presented in Table 1 . This material is widely used in aerospace industry and considered to be superplastic in the temperature range of 800–900 °C [ 19 ]. The material flow behavior was investigated by tensile testing at the temperatures of 790, 840, and 890 °C.…”

Section: Materials and Experimentsmentioning

confidence: 99%

“…The significant post-uniform deformation of this alloy at ambient and near ambient temperatures was shown in [ 18 ]. High temperature superplastic bulge forming of OT4-1 was studied in [ 19 ] in a wide range of temperatures. The microstructure of OT4-1 is investigated in [ 19 ].…”

Section: Introductionmentioning

confidence: 99%

“…High temperature superplastic bulge forming of OT4-1 was studied in [ 19 ] in a wide range of temperatures. The microstructure of OT4-1 is investigated in [ 19 ]. According to this paper the post-formed microstructures show no significant grain size changes.…”

Section: Introductionmentioning

confidence: 99%

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Characterization of OT4-1 Alloy by Multi-Dome Forming Test

et al. 2017

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In this study, the rheological characteristics of a titanium alloy have been obtained by multi-dome bulging test. Free bulging process is an experimental technique that can be used to characterize material in conditions of biaxial tension during superplastic, as well as conventional, hot forming. The constitutive constants are calculated on a base of the information about the bulge geometry, applied pressure, and forming time. A multi-dome forming test allows one to reduce the number of the experiments required for the characterization, since every multi-dome test produces several domes of different size. In this study, a specific die for multi-dome test was used. The die has six holes with different radiuses of 20, 25, 30, 35, 40, and 45 mm. During a test, the specimen is clamped between blank holder and die holder, heated to a specific temperature, and formed by applying constant gas pressure. The experiments were conducted at different temperatures for OT4-1 titanium alloy. The constitutive constants were obtained by processing the experimental data using two different techniques and compared with tensile test results. In order to estimate the influence of friction on the experimental results and to verify obtained material characteristics, finite element (FE) simulation was performed. Finally, the results of FE simulation were compared with the experimental data. The results of the simulation show the advantage of material characterization based on multi dome tests and its interpretation by inverse analysis. The deviations produced by the effect of friction are more significant when the direct approach is applied instead of inverse analysis with a semi analytical model of the bulging process.

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Section: Materials and Experimentsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Characterization of OT4-1 Alloy by Multi-Dome Forming Test

et al. 2017

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“…Yogesha and Bhattacharya [13] have analysed a single stage hemispherical dome for its superplastic deformation characteristics in terms of micro-structure, forming time, thickness strain, pole thickness, thinning factor and temperature using a TiAl-Mn alloy. Senthil Kumar et al [14] have studied the forming of a single stage hemispherical die, both experimentally and using the finite element method in terms of relative height, forming time, pressure, temperature and thickness distribution.…”

Section: Introductionmentioning

confidence: 99%