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Ti-6Al-4V电弧熔丝增材轧制复合制造的有限元模拟
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作者单位:

1.中国科学院金属研究所;2.中航工业北京航空制造工程研究所

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中图分类号:

TG44

基金项目:

国家重点研发计划项目资助(2016YFB0701304)


Finite Element Simulation of Hybrid Manufacturing of Ti-6Al-4V by Wire Arc Additive Manufacturing and Rolling
Author:
Affiliation:

1.Institute of Metal Research, Chinese Academy of Sciences;2.AVIC Manufacturing Technology Institute

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    摘要:

    增材制造过程中由于在凝固及随后的冷却阶段易产生残余应力,从而影响部件的成形和使用。在增材过程中引入轧制工序,可望降低宏观残余应力,从而降低部件的变形。本文通过建立Ti-6Al-4V钛合金电弧熔丝增材与层间轧制复合成形过程的有限元模型,研究圆柱形轧辊条件下不同压下量对部件温度、应力、应变及残余应力分布的影响规律。结果表明,层间轧制可显著降低沉积层金属中的残余宏观应力;同时降低对基板的整体应力。采用圆柱形轧辊并增加压下量可显著降低宏观残余应力,还可以通过塑性变形改变材料的微观组织,提高材料性能,为复合增材工艺的优化指明了方向。

    Abstract:

    In Wire Arc Additive Manufacturing (WAAM), residual stress is easily generated during solidification and subsequent cooling, which affects the formation and use of the components. In this paper, finite element simulations are carried out to investitgate the influence of roller reductions on the temperature, stress, strain and residual stress distribution in components during the hybrid forming of Ti-6Al-4V alloy by WAAM and interlayer rolling. The results show that interlayer rolling reduce the residual macroscopic stress significantly in the deposited metal, and at the same time reduce the overall stress on the substrate. Increasing reduction can reduce significantly the macroscopic residual stresses and distorsion of the components. The microstructure of the material can be changed dramatically by the plastic deformation after rolling, which lead to a new route for the optimization of the microstructure during additive manufcturing.

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鞠洪涛,徐东生,单飞虎,杨锐. Ti-6Al-4V电弧熔丝增材轧制复合制造的有限元模拟[J].稀有金属材料与工程,2020,49(3):878~882.[Ju Hongtao, Xu Dongsheng, Shan Feihu, Yang Rui. Finite Element Simulation of Hybrid Manufacturing of Ti-6Al-4V by Wire Arc Additive Manufacturing and Rolling[J]. Rare Metal Materials and Engineering,2020,49(3):878~882.]
DOI:10.12442/j. issn.1002-185X.17Ti2019229

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  • 收稿日期:2019-06-24
  • 最后修改日期:2019-09-03
  • 录用日期:2019-09-04
  • 在线发布日期: 2020-04-08
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