通过等温锻造同步提高电子束焊接 Ti600/Ti2AlNb 接头的强度和电导率

IF 4.8 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Yongqiang Zhang , Xiangyi Xue , Guoming Zheng , Jingli Zhang , Huiming Li , Shewei Xin
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引用次数: 0

摘要

不同的合金可以通过焊接工艺灵活组合,以满足压缩机盘不同部件的性能需求。然而,如何将具有不同机械性能的异种合金很好地结合在一起一直是研究的难点。在这项工作中,通过电子束焊接制造了 Ti600/Ti2AlNb 接头,并采用等温锻造优化了其微观结构和机械性能。等温锻造工艺使 Ti600/Ti2AlNb 接头的极限拉伸强度(UST)和屈服强度(YS)提高了 18%,延展性提高了 2.5 倍。这表明,锻造前,Ti600/Ti2AlNb 接头的强度远低于 Ti600 基体的强度,而等温锻造后则相反。等温锻造破坏了 Ti600/Ti2AlNb 接头的粗柱状晶粒,使其变成等轴状的 B2 结构,其中析出了针状的 α2 和 O 相,从而同步提高了强度和延展性。这项工作可为改善异种金属焊接接头的综合机械性能铺平道路。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Improving strength-ductility synchronously of Electron beam welded Ti600/Ti2AlNb joint through isothermal forging

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.

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来源期刊
CiteScore
8.60
自引率
2.10%
发文量
2812
审稿时长
49 days
期刊介绍: Progress in Natural Science: Materials International provides scientists and engineers throughout the world with a central vehicle for the exchange and dissemination of basic theoretical studies and applied research of advanced materials. The emphasis is placed on original research, both analytical and experimental, which is of permanent interest to engineers and scientists, covering all aspects of new materials and technologies, such as, energy and environmental materials; advanced structural materials; advanced transportation materials, functional and electronic materials; nano-scale and amorphous materials; health and biological materials; materials modeling and simulation; materials characterization; and so on. The latest research achievements and innovative papers in basic theoretical studies and applied research of material science will be carefully selected and promptly reported. Thus, the aim of this Journal is to serve the global materials science and technology community with the latest research findings. As a service to readers, an international bibliography of recent publications in advanced materials is published bimonthly.
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