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Analysis of the Microstructure and Mechanical Properties during inertia friction welding of the Near-α TA19 Titanium Alloy

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Chinese Journal of Mechanical Engineering 2020年第6期33卷 205-217页

作者： Yanquan Wu Chunbo Zhang Jun Zhou Wu Liang Yunlei Li Research and Development Center Harbin Welding Institute Limited CompanyHarbin150028China China Academy of Machinery Science and Technology Group Co. LtdBeijing100044China

The current research of titanium alloy on friction welding process in the field of aero-engines mainly focuses on the linear friction *** to the linear friction welding,inertial friction welding of titanium alloy still has important application position in the welding of aero-engine rotating ***,up to now,few reports on inertial friction welding of titanium alloy are *** this paper,the near-alpha TA19 titanium alloy welded joint was successfully obtained by inertial friction welding(IFW)*** microstructures and mechanical properties were investigated *** showed that the refined grains within 15‒20μm and weak texture were found in the weld zone due to dynamic recrystallization caused by high temperature and plastic *** weld zone consisted of acicularα′martensite phase,αp phase and metastableβ*** lath-shapedαs andβphase in base metal were transformed into acicular martensiteα′phase and metastableβphase in thermo-mechanically affected zone and heat affected *** a result,the microhardness of welded joint gradually decreased from the weld zone to the base *** specimens in room temperature and high temperature of 480℃ were all fractured in base metal illustrating that the inertia friction welded TA19 titanium alloy joint owned higher tensile strength compared to the base metal.

关键词： inertia friction welding TA19 Micostructure Mechanical property Texture

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THE COUPLED FEM ANALYSIS OF THE TRANSIENT TEMPERATURE FIELD DURING inertia friction welding OF GH4169 ALLOY

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Acta Metallurgica Sinica(English Letters) 2007年第4期20卷 301-306页

作者： L.W. Zhang J.B. Pei Q.Z. Zhang C.D. Liu W.H. Zhu S. Qu J.H. Wang The State Key Laboratory for Materials Modification by Laser Ion and Electron Beams Dalian University of Technology Dalian 116023 China School of Materials Science and Engineering Dalian University of Technology Dalian 116023 China Shenyang Li Ming Aero-Engine Group Corporation Shenyang 110043 China

The inertia friction welding process is a non-linear process because of the interaction between the temperature field and the material properties as well as the friction force. A thermo-mechanical coupled finite element model is established to simulate the temperature field of this process. The transient temperature distribution during the inertia friction welding process of two similar workpieces of GH4169 alloy is calculated. The region of the circular cross-section of the workpiece is divided into a number of four-nodded isoparametric elements. In this model, the temperature dependent thermal properties, time dependent heat inputs, contact condition of welding interface, and deformation of the flash were considered. At the same time, the convection and radiation heat losses at the surface of the workpieces were also considered. A temperature data acquisition system was developed. The temperature at some position near the welding interface was measured using this system. The calculated temperature agrees well with the experimental data. The deformation of the flash and the factor affecting the temperature distribution at the welding interface are also discussed.

关键词： inertia friction welding temperature field numerical simulation finite element method

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Heterogeneous Deformation Behaviors of an inertia friction Welded Ti_(2)AlNb Joint:an In‑situ Study

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Acta Metallurgica Sinica(English Letters) 2023年第4期36卷 611-622页

作者： Dingcong Cui Qingfeng Wu Feng Jin Chenbo Xu Mingxin Wang Zhijun Wang Junjie Li Feng He Jinglong Li Jincheng Wang State Key Laboratory of Solidification Processing Northwestern Polytechnical UniversityXi’an 710072China

A defect-free Ti_(2)AlNb joint has been obtained by the inertia friction welding(IFW)*** weld zone(WZ)is composed of B2 grains refined by discontinuous dynamic recrystallization and enhanced by grain refinement *** the average microhardness decreases by about 30 HV from the WZ to the base ***-situ SEM analysis reveals that the heterogeneous structure of the joint causes strong strain partitioning during tensile *** microcrack initiation occurs at the interface of the initial B2 phases and B2/O *** to stress concentration,the multi-slip bands and cracks tend to generate in the heat-affected zone(HAZ),causing a premature fracture.

关键词： Ti_(2)AlNb alloy inertia friction welding Microstructure Deformation behaviors

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High-Temperature Fatigue Behavior of inertia friction Welded Joints of GH4065A Ni-Based Superalloy

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Acta Metallurgica Sinica(English Letters) 2024年第11期37卷 1935-1946页

作者： Xiaoguang Li Jiatao Liu Qing Liu Chunbo Zhang Hang Liang Lei Cui Yongchang Liu School of Materials Science and Engineering Tianjin UniversityTianjin300072China AECC Shenyang Liming Aero-Engine Co. LtdShenyang110043China Harbin welding Institute Co. LtdHarbin150028China Tianjin Key Laboratory of Advanced Joining Technology Tianjin300072China

In this work,the novel Ni-based superalloy GH4065A inertia friction welding(IFW)joints were subjected to the post-welding heat treatments(PWHT)at 730℃for 5 h or 760℃for 5 h,and the differences in microstructure characteristics,local mechanical properties,and fatigue failure life were ***,based on the high-temperature low-cycle fatigue testing and characterization results,the correlation between the microstructure characteristics and low-cycle fatigue damage behavior was systematically *** was found that there were smaller grains in the thermo-mechanically affected zone(TMAZ)than in the weld zone and heat-affected zone(HAZ),and the boundary region between TMAZ and HAZ was the fatigue failure position of IFW joints under the high-temperature low-cycle fatigue *** fatigue testing results showed that the high-temperature fatigue performance for GH4065A IFW joints degenerated with the increase in PWHT *** existed cyclic softening and inhomogeneous fatigue damage in an IFW joint,which was more significant under the 760℃5 h PWHT ***,dislocation tangles and cells formed in the boundary region between TMAZ and HAZ under the fatigue *** difference in grain size after the IFW process and the inhomogeneousγ′phrase re-precipitation after the PWHT in the boundary region between TMAZ and HAZ resulted in the local inhomogeneous strengthening,corresponding to uneven plastic deformation and fatigue failure behavior under the fatigue loadings.

关键词： inertia friction welding GH4065A alloy Low-cycle fatigue Post-welding heat treatment Fatigue behavior

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Effect of Rotation Speed on Temperature Field and Axial Shortening of inertia friction Welded GH4169 Joints by Numerical Simulation

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Journal of Shanghai Jiaotong university(Science) 2011年第3期16卷 277-280页

作者：陈亮李文亚李京龙 State Key Laboratory of Solidification Processing Shaanxi Key Laboratory of friction welding Technologies School of Materials Science and EngineeringNorthwestern Polytechnical University

A 2D finite element model was established for inertia friction welding of GH4169 nickel-base superalloy based on the ABAQUS *** remeshing and map solution techniques were adopted to solve the problem of element *** effect of rotation speed on the temperature field and axial shortening of joints was *** results show that the interface temperature increases rapidly to higher than 900℃within *** then,it increases slowly to a quasi-stable *** axial shortening begins to augment quickly when a uniform interface temperature field has formed and the plasticized material is extruded from the interface to form an obvious *** rotation speed of the flywheel controls the welding process and has a significant influence on the temperature evolution and axial shortening of joints.

关键词： inertia friction welding numerical simulation map solution temperature field

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