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Zhang Z.,Xian Jiaotong University | Peng L.,Xian Jiaotong University | Wang J.,Xian Jiaotong University | Li Y.,Xian Jiaotong University | Liu R.,Baoji Titanium Industry Co.
Procedia Engineering | Year: 2011

In this paper, the dynamic process of explosive welding for large-sized plates is studied by numerical simulation. Folding deformation could be found during the process of explosive welding based on the studies on the morphological changes of the flyer plate at different time. The calculation results are in good agreement with the practical projects. The study shows that folding deformation is a crucial problem which should be noticed in the process of explosive welding, and the reasons for folding deformation are discussed in the paper. The conclusion can give reference for the development of explosive welding technology. © 2010 Published by Elsevier Ltd. Source

Wang X.-X.,Baoti Group Co. | Wang W.-Q.,Baoji Titanium Industry Co. | Zhang Y.-Q.,Baoti Group Co.
Materials Science Forum | Year: 2013

The microstructures of the Alloy C+ with three different heat treatment processes have been investigated after exposure at 550 °C for 100 hours in this study. The alloy shows typical equiaxed β grains with second phase precipitation and twin formation inside the β grains in the as-rolled condition. Solution treatment at lower temperature led to a smaller β grain size while higher temperature solution treatment produced coarse grains with increasing precipitated phases inside the β grains. Ageing treatment after solution and thermal exposure for a long period of time resulted in an increasing α phase precipitation at the grain boundaries due to their tendency for preferential nucleation of second phases. In a certain condition, continuous coarsening of the α phase is concentrated on the grain boundaries therefore violate the properties of the alloy. © (2013) Trans Tech Publications, Switzerland. Source

Wang X.,Baoji Titanium Industry Co. | Liu J.,CAS Shenyang Institute of Metal Research | Lei J.,CAS Shenyang Institute of Metal Research
Ti 2011 - Proceedings of the 12th World Conference on Titanium | Year: 2012

The microstructure, tensile property, and damage tolerance property of the Ti-6Al-2Zr-2V-1. 5Mo ELI titanium alloy after two processes routines was investigated. The results showed that the microstructure after two processes was the bunched lamellar structure without primary α phase, and the α lamellar of bars after β forging was thicker, The high damage tolerance property could be achieved by one of these two processes routine Tensile strength and fracture toughness of the bars after β forging and double annealing at α+β dual phase zone were higher while the plasticity, dynamic: ductility and resistance of fatigue crack propagation of bars after α+β zone forging followed by β annealing were higher, It in dicated that the fracture toughness property increased and resistance of fatigue crack growth decreased with the increasing of thickness of α lamellar in the Ti-6Ai-2Zr-2V-1. 5Mo ELI titanium alloy. Source

Xin T.,Baoji Titanium Industry Co.
Ti 2011 - Proceedings of the 12th World Conference on Titanium | Year: 2012

To the technical problem of easy occurrence of missed test on deficiencies or of difficulty in evaluating films because of big blackness difference when performing l00% X-ray test on key places at crossing angles in T shaped titanium castings, this article describes how to choose the incidence angle at corner of T shaped titanium castings for X ray test, and how to calculate the radiographic thickness according to chosen incidence angle. Based on the work, this article determines the test sensitivity and the radiographic process parameters. Source

Chen J.,Northwestern Polytechnical University | Chen J.,Xian Technological University | Yan W.,Northwestern Polytechnical University | Yan W.,Xian Technological University | And 3 more authors.
Transactions of Nonferrous Metals Society of China (English Edition) | Year: 2011

The texture evolution of cold drawing copper wires produced by continuous casting was measured by X-ray diffractometry and electron back-scatter diffractometry, and was simulated using Taylor model. The results show that in the drawn poly-crystal copper wires produced by traditional continuous casting, 〈111〉 and 〈100〉 duplex fiber texture forms, and with increasing strain, the intensities of 〈111〉 and 〈100〉 increase. In the drawn single-crystal copper wires produced by Ohno continuous casting, 〈100〉 rotates to 〈111〉, and there is inhomogeneous distribution of fiber texture along radial direction of the wires, which is caused by the distribution of shear deformation. Compared with 〈100〉, 〈111〉 fiber texture is more stable in the drawn copper wires. Comparison of the experimental results with the simulated results shows that the simulation by Taylor model can analyze the texture evolution of drawn copper wires. © 2011 The Nonferrous Metals Society of China. Source

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