The effect of thermal cycling in superplastic diffusion bonding of 2205 duplex stainless steel |
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| Affiliation: | 1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 10083, PR China;2. Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 10024, PR China;1. Super Insulation Composite Laboratory, College of Materials Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, PR China;2. School of Electronic Science and Engineering, Nanjing University, Nanjing 210016, PR China;3. Center of Materials Physics and Chemistry, School of Physics and Nuclear Energy Engineering, Beijing University of Aeronautics and Astronautics, Beijing 100191, PR China;1. Université de Lorraine, Laboratoire de Chimie Physique et Microbiologie pour l''Environnement (LCPME), UMR 7564, 405 rue de Vandœuvre, F-54600 Villers-lès-Nancy, France;2. CNRS, Laboratoire de Chimie Physique et Microbiologie pour l''Environnement (LCPME), UMR 7564, 405 rue de Vandœuvre, F-54600 Villers-lès-Nancy, France;3. Ecole Nationale Supérieure de Chimie de Rennes, UMR CNRS 6226, 11 Allée de Beaulieu, CS 50837, F-35708 Rennes cedex 7, France;4. Université Européenne de Bretagne, 4 Boulevard Laennec, F-35700 Rennes, France;1. School of Materials Science and Engineering, Dalian University of Technology, Dalian 116085, PR China;2. Beijing Aeronautical Manufacturing Technology Research Institute, Beijing 100024, PR China;1. Department of Applied and Environmental Chemistry, University of Szeged, Rerrich Béla tér 1, Szeged H-6720, Hungary;2. Laboratory of High Performance Ceramics, Swiss Federal Laboratories for Materials Science and Technology, Überlandstrasse 129, Dübendorf CH-8600, Switzerland;3. Laboratory of Physics of Complex Matter, École Polytechnique Fédérale de Lausanne, Ecublens CH-1026, Switzerland;1. School of Manufacturing Science and Engineering, Sichuan University, Chengdu 610065, China;2. Sichuan Engineering Technical College, Deyang 618000, China |
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| Abstract: | In view of the requirement of large cold rolling deformation and bonding pressure in the conventional superplastic diffusion bonding of 2205 duplex stainless steel, a novel method of introducing thermal cycling into the process was proposed. During the thermal cycling process, due to the change of temperature, surface chemical activity of 2205 duplex stainless steel was improved, activity of atoms and grain boundaries were improved, and the recrystallized grains were refined. The shear bond strength of joint prepared in the mode of thermal cycling using specimens with the cold roll reduction of 60% was 15 MPa higher than that of conventional bonding using specimens with the cold roll reduction of 85%. Compared to the shear bond strength of 430 MPa under the specific pressure of 10 MPa after conventional bonding, shear bond strength of 623 MPa was obtained under the condition of Tmax = 1000 °C, Tmin = 900 °C, cycle number of heating and cooling N = 3, and specific pressure P = 5 MPa. |
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