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首页> 外文会议>International Conference on Information and Computing >Finite element calculation of residual stress and cold-work hardening induced in Inconel 718 by Low Plasticity Burnishing
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Finite element calculation of residual stress and cold-work hardening induced in Inconel 718 by Low Plasticity Burnishing

机译：通过低塑性抛光，在第718型诱导的残余应力和冷加工硬化的有限元计算

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Low Plasticity Burnishing (LPB), a mechanical surface enhancement technology was developed to produce a deep layer of highly compressive residual stress comparable to laser shot peening, but with minimal cold-work hardening, LPB produces the most thermally stable compression to hot sections of gas turbine engines made by superalloy like Inconel 718. Literatures detailing the experimental effects of LPB are comprehensive, however, there is still a special need for a reliable Finite Element (FE) calculation to provide a fundamental understanding of LPB mechanism. The paper establishes a three-dimensional non-linear FE model, where the flow stress is taken as a function of strain, strain rate and temperature, and the Zienkiewics-Zhu adaptive plastic strain remeshing method is used. Calculated results show that LPB can produce the maximum compressive residual stress about 1000 MPa to a depth more than 1.6 mm, but the cold-work hardening can be controlled to less than 2.5%, the predicted results is validated by the experimental data obtained by X-ray diffraction measurements.
机译：低塑性抛光（LPB），开发了一种机械表面增强技术，以产生与激光喷丸的深层压缩残余应力的深层，但具有最小的冷加工硬化，LPB为热部分产生最热稳定的压缩由Superalloy制造的涡轮发动机如Inconel 718.详细说明LPB的实验效果是全面的，然而，仍然需要一种可靠的有限元（FE）计算，以提供对LPB机制的基本理解。本文建立了一种三维非线性Fe模型，其中流应力作为应变，应变率和温度的函数，使用Zienkiewics-Zhu自适应塑性应变倒闭方法。计算结果表明，LPB可以产生约1000MPa的最大压缩残余应力，深度为1.6毫米，但冷加工硬化可以控制为小于2.5％，预测结果由X获得的实验数据验证 - 射线衍射测量。

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