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Abstract：
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In order to study and verify the superplastic forming properties of Ti2AlNb alloy, the thermal properties of Ti2AlNb alloy were tested, and the thermal conductivity, specific heat capacity and thermal expansion coefficient of Ti2AlNb alloy at room temperature and high temperature were obtained. Combined with the test results of thermal properties, the superplastic forming/diffusion bonding（SPF/DB）process of two-layer Ti2AlNb alloy structural parts with typical aeronautical dimensions was simulated by MSC.MARC software, and the thickness change and stress distribution after forming were analyzed. Then, the two-layer Ti2AlNb alloy structural parts with typical aeronautical dimensions were successfully fabricated by SPF/DB process, and the thickness of key positions, the metallographic structure and strength of diffusion bonding area were analyzed and measured. The test results show that the two-layer Ti2AlNb alloy structure parts can be fabricated at the forming temperature of 970 ℃ and the strain rate of 3×10-4 s-1, and the forming quality of structural parts is good to meet the requirements of aeronautical engineering manufacturing. Thus, the test results are in good agreement with the simulation results.
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Funds：
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国家自然科学基金资助项目（5187122）
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AuthorIntro：
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王珏（1986-），男，硕士，高级工程师，E-mail：wangjue_wangjue@126.com
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Reference：
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