Author
Daosheng Wen
Other affiliations: University of Jinan
Bio: Daosheng Wen is an academic researcher from Harbin Institute of Technology. The author has contributed to research in topics: Alloy & Dynamic recrystallization. The author has an hindex of 6, co-authored 14 publications receiving 176 citations. Previous affiliations of Daosheng Wen include University of Jinan.
Papers
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TL;DR: In this paper, changes in the morphology and composition of the O, α2 and B2/β phases and the transformation relationship between the three phases of Ti22Al25Nb alloy were systematically investigated by performing a series of short heat treatments.
68 citations
TL;DR: In this paper, the deformation-induced phase transformation at high temperature was attributed to deformation induced phase transformation in a TiAl-based alloy during rolling, low-cost plane strain compression tests were carried out at elevated temperature.
54 citations
22 Feb 2016-Materials Science and Engineering A-structural Materials Properties Microstructure and Processing
TL;DR: In this paper, high temperature deformation behaviors of the unhydrogenated and hydrogenated Ti-46Al-2V-1Cr-0.3Ni alloys were investigated in the temperature range 1050-1200 ǫ c and strain rate range 0.001-1 s−1.
Abstract: High temperature deformation behaviors of the unhydrogenated and hydrogenated Ti-46Al-2V-1Cr-0.3Ni (at%) alloys were investigated in the temperature range 1050–1200 °C and strain rate range 0.001–1 s−1. The flow stress of the hydrogenated alloy was lower than that of the unhydrogenated alloy, which was mainly attributed to hydrogen-promoted lamellar decomposition, twinning and dynamic recrystallization. Processing maps of the unhydrogenated and hydrogenated alloys were constructed. The stability domain of the hydrogenated alloy was enlarged in comparison with that of the unhydrogenated alloy, meaning hydrogen enhanced the hot workability of the Ti-46Al-2V-1Cr-0.3Ni alloy. Hydrogen activated slip systems so that lamellar bending more easily occurred in the hydrogenated alloy, which made inter-lamellar fracture convert into trans-lamellar fracture. Therefore, crack propagation was restrained in the hydrogenated alloy during hot deformation. The critical strain of the hydrogenated alloy was less than those of the unhydrogenated alloy, meaning the dynamic recrystallization occurred earlier in the hydrogenated alloy. γ-phase discontinuous dynamic recrystallization was promoted due to hydrogen addition, leading to a consumption of plentiful dislocations, which restrained continuous dynamic recrystallization to some extent. Hydrogen-promoted discontinuous dynamic recrystallization was mainly attributed to hydrogen-promoted lamellar decomposition, twinning, and hydrogen-decreased stacking fault energy.
25 citations
TL;DR: In this article, the effect of hydrogen on phase transformation and mechanical properties of the unhydrogenated Ti-45Al-5Nb-0.3Y alloy with 1.5 at.
18 citations
TL;DR: In this article, the effect of hydrogen on the microstructural evolution of a Ti-46Al-2V-1Cr-0.3Ni alloy deformed in temperature range 1323-1473 K and strain rate range 0.001-1 s−1 was investigated.
15 citations
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TL;DR: In this article, an intermetallic Ti-22Al-25Nb has been successfully fabricated by selective laser melting (SLM) and the as-printed samples show a high room-temperature ultimate tensile strength ∼1090 MPa and excellent ductility ∼22.7%.
87 citations
TL;DR: In this paper, the precipitation mechanisms of O phase, phase transformation and microstructure control of Ti2AlNb-based alloys are reviewed, and the phase diagram as well as coarsening behavior of these alloys in ageing process is also reviewed.
73 citations
TL;DR: In this article, the relationship of the microstructure and tensile properties between the rolling conditions was investigated by fabricating Ti-44Al-8Nb-(W, B, Y) alloy sheets under different rolling conditions.
58 citations
TL;DR: In this article, a pre-deformation process was employed for a TiAl alloy via high-temperature torsion, in which the stability of the constituent phases was tailored, resulting in enhanced hardening capability and ductility via a gradient microstructure.
57 citations
TL;DR: In this article, quasi-in situ tensile unloading and electron backscatter diffraction (EBSD)-based slip trace analysis were applied to study the room-temperature deformation behaviour of Ti 22Al 25Nb alloys with three different microstructures and the plastic deformation mechanism of the B2, α2, and O phases.
57 citations