| METALS AND METAL MATRIX COMPOSITES |
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| Effect of Heat Treatment System on Microstructure and Mechanical Properties of Linear Friction Welded Joint of TC17 Titanium Alloy |
| LI Rui, ZHOU Jun, LIANG Wu, ZHANG Chunbo, WU Yanquan
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| Heilongjiang Provincial Key Laboratory of Advanced Friction Welding Technology and Equipment, Harbin Welding Institute Limited Company, Harbin 150028, China |
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Abstract In this paper, the linear friction welding test of TC17 titanium alloy, a common material of integral blade disc of aeroengine, was conducted. The microstructure morphology and mechanical properties of joints under different heat treatment conditions were analyzed by OM, SEM, microhardness and tensile test at room temperature. It is found that due to the complex thermal coupling effect in the welding process, the typical microstructure of the welding seam area, the thermal engine influence area and the thermal influence area are formed, and the welding joint perfor-mance is significantly reduced. After heat treatment after welding, thanks to the decomposition of the metastable β phase and the metastable α phase, the diffusely distributed needle-α phase was separated out, which greatly improved the joint performance. Moreover, the diffusely distributed needle-beam strengthening effect is closely related to the heat treatment temperature. The reasonable match between the strength and plasti-city of TC17 linear friction welded joint can be achieved through a reasonable heat treatment system, thus improving the joint’s comprehensive performance.
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Published: 12 November 2021
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| Fund:National Science and Technology Major Projects of China (2018ZX04010001), the Science and Technology Coope-ration Project of Heilongjiang Province (YS20A19). |
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Corresponding Authors:
mch_zhoujun@126.com
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About author:: Rui Li, born in 1995, is a postgraduate of Harbin Welding Institute Limited Company, majoring in linear friction welding technology.
Jun Zhou, born in 1963, director of Heilongjiang Provincial Key Laboratory of Advanced Friction Welding Technology and Equipment, researcher, doctoral supervisor, mainly engaged in friction welding equipment and welding technology research. Special allowance expert of the state council, compound expert of the general research institute of mechanical science, senior member of the society of mechanical engineering, deputy director of the pressure welding professional committee of the welding branch of the chinese society of mechanical engineering, published more than 30 articles and applied for more than 20 invention patents. |
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2021, Vol. 35 
