首页|Improving strength-ductility synchronously of Electron beam welded Ti600/Ti2AlNb joint through isothermal forging

Improving strength-ductility synchronously of Electron beam welded Ti600/Ti2AlNb joint through isothermal forging

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Different alloys can be flexibly combined to meet the performance needs of different parts of the compressor disc by welding process.However,achieving a good combination of dissimilar alloys with different mechanical properties has always been a research difficulty.In this work,a Ti600/Ti2AlNb joint was fabricated through electron beam welding and an isothermal forging was used to optimized its microstructure and mechanical performance.The isothermal forging process increases the ultimate tensile strength(UST)and yield strength(YS)of the Ti600/Ti2AlNb joint by～18％,while～2.5 times the ductility.It is indicated that before forging,the Ti600/Ti2AlNb joint exhibits a much lower strength than that of Ti600 matrix,whereas the opposite is true after isothermal forging.The isothermal forging broken the coarse columnar grains of Ti600/Ti2AlNb joint and render to an equiaxed B2 structure in which the acicular α2 and O phase are precipitated,resulting a synchronous enhancement of strength and ductility.This work may pave an effective routine for improving the comprehensive mechanical properties of dissimilar metal welding joint.

Electron beam weldingTi600/Ti2AlNb jointIsothermal forgingMechanical performance

Yongqiang Zhang、Xiangyi Xue、Guoming Zheng、Jingli Zhang、Huiming Li、Shewei Xin

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State Key Laboratory of Solidification Processing,Northwestern Polytechnical University,Xi'an,710072,China

Xi'an QinTi Intelligent Manufacturing Technologies Co.Ltd.,Xi'an,710016,China

Northwest Institute for Nonferrous Metal Research,Xi'an,710016,China

State Key Laboratory of Solidification Processing,Northwestern Polytechnical,University,Xi'an 710072,China

Northwest Institute for Nonferrous Metal Research,Xi'an 710016,China

Xi an University of Science and Technology,Xi'an 710054,China

AVIC Xi'an Aircraft Industry Group Company Ltd.,Xi'an 710089,China

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2024

10.1016/j.pnsc.2024.04.012

自然科学进展·国际材料(英文)
国家自然科学基金委员会

自然科学进展·国际材料(英文)

影响因子：0.25
ISSN：1002-0071
年,卷(期)：2024.34(3)