Effect of Hydrogen on Phase Transformation, Thermal Deformation Behavior, and Forming Limit of TC2 Alloy

The solidification shrinkage of liquid steel has an important impact on thermal deformation behavior of high-temperature thin shell. Solidification shrinkage of liquid steel is an important basis for structure and shap optimization of the mould. In this paper, a direct coupled model was built on heat transfer in solidification and stress-strain by using the ANSYS software. And solidification shrinkage of liquid steel with the interior temperature and stress distribution were studied in the process of steel solidification, and it provided a theoretical basis for the further optimization of shape of the thin slab FTSC mould. This study was based on analysis of temperature and stress, deriving calculation of solidification shrinkage of steel’s phase change on macro-state by calculating the variation discipline of the distance between nodes.

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Phase transformation and deformation behavior of a TiAl–Nb composite under quasi-static and dynamic loadings

Materials Science and Engineering A ◽

10.1016/j.msea.2021.142155 ◽

2021 ◽

pp. 142155

Author(s):

Li Wang ◽

Xiaopeng Liang ◽

Fuqing Jiang ◽

Sihui Ouyang ◽

Bin Liu ◽

...

Keyword(s):

Phase Transformation ◽

Deformation Behavior ◽

Dynamic Loadings

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Thermal deformation behavior of γ-TiAl based alloy by plasma hydrogenation

International Journal of Hydrogen Energy ◽

10.1016/j.ijhydene.2020.09.008 ◽

2020 ◽

Vol 45 (58) ◽

pp. 34214-34226

Author(s):

Fuyu Dong ◽

Yongda Liu ◽

Yue Zhang ◽

Weidong Li ◽

Peter K. Liaw ◽

...

Keyword(s):

Deformation Behavior ◽

Thermal Deformation ◽

Plasma Hydrogenation

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Investigation on Friction Coefficient Considering Al-Si Coating Layer Fracture of Boron Sheets in Hot and Cold Deep Drawing

Key Engineering Materials ◽

10.4028/www.scientific.net/kem.846.117 ◽

2020 ◽

Vol 846 ◽

pp. 117-121

Author(s):

Min Sik Lee ◽

Jun Park ◽

J.S.Suresh Babu ◽

Chung Gil Kang

Keyword(s):

Friction Coefficient ◽

Deep Drawing ◽

Deformation Behavior ◽

Coating Layer ◽

Surface Condition ◽

Forming Limit ◽

Boron Steel ◽

Drawing Process ◽

Forming Process ◽

Deep Drawing Process

In this paper, hot and cold deep drawing processes are determined with direct deep drawing process and indirect deep drawing process. To predict the friction coefficient, the finite-element method, which can predict deformation behavior until the fracture of a blank sheet, was proposed using the forming limit diagram (FLD) curve. The effect of fracturing of the coating layer on the friction coefficient during the hot and cold deep drawing processes was investigated. The deformation behavior of the coating layer of the boron steel sheet that affects the friction coefficient in the hot and cold deep drawing processes was also proposed. A forming method that can control the surface condition of the formed product is further proposed by explaining the fracture of the coating due to the forming process.

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Continuous Cooling Phase Transformation Rules of High Nb X80 Pipeline Steel

Materials Science Forum ◽

10.4028/www.scientific.net/msf.850.916 ◽

2016 ◽

Vol 850 ◽

pp. 916-921

Author(s):

Pei Pei Xia ◽

Liu Qing Yang ◽

Xiao Jiang Guo ◽

Ye Zheng Li

Keyword(s):

Phase Transformation ◽

Cooling Rate ◽

Acicular Ferrite ◽

Thermal Deformation ◽

Pipeline Steel ◽

Phase Transformation Temperature ◽

X80 Pipeline Steel ◽

Continuous Cooling ◽

Simulation Testing ◽

Cooling Phase

The microstructural evolution of the high Nb X80 pipeline steel in Continuous Cooling Transformation (CCT) by Gleeble-3500HS thermal mechanical simulation testing system was studied, the corresponding CCT curves were drawn and the influence of some parameters such as deformation and cooling rate on microstructure of high Nb X80 pipeline steel was analyzed. The results show that as cooling rate increased, the phase transformation temperature of high Nb X80 steel decreased, with the microstructure transformation from ferrite-pearlite to acicular ferrite and bainite-ferrite. When cooling rate was between 20°C/s and 30°C/s, the microstructure was comparatively ideal acicular ferrite, thermal deformation accelerates phase transformation notably and made the dynamic CCT curves move upward and the initial temperature of phase transformation increase obviously. Meanwhile the thermal deformation refined acicular ferrite and extended the range of cooling rate accessible to acicular ferrite.

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