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首页> 外文期刊>Materials Science and Engineering >Process-influenced fatigue behavior of AISI 316L manufactured by powder-and wire-based Laser Direct Energy Deposition
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Process-influenced fatigue behavior of AISI 316L manufactured by powder-and wire-based Laser Direct Energy Deposition

机译：基于粉丝和线激光直接能量沉积制造的AISI 316L的过程影响的疲劳行为

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摘要

Because of the enormous potential of Laser Direct Energy Deposition (L-DED) regarding the production and maintenance of components with complex geometries, this type of Additive Manufacturing processes is of great industrial and scientific interest. As two principals of L-DED, i.e., wire-based (L-DED-W) and powder-based (L-DED-P) processes, are commonly used, it is indispensable to thoroughly analyze the influence of the raw material as well as process conditions on the resulting material properties. Therefore, in the present work specimens made of AISI 316L and manufactured via L-DED-P and L-DED-W were investigated. To characterize the cyclic properties of the produced material volume, instrumented cyclic indentation tests (CITs) as well as uniaxial fatigue tests were performed. The cyclic deformation behavior obtained in fatigue tests indicate a significantly higher fatigue strength of L-DED-W material, correlating with a higher 8-ferrite fraction and smaller grain size. This is caused by the different process conditions, whereby the increased S-ferrite fraction of L-DED-W results from the difference in chemical composition. However, the S-N_f curves show a higher fatigue limit at 2 × 10~6 cycles for L-DED-P, which is caused by the significantly larger process-induced nonmetallic inclusions observed in L-DED-W specimens. In summary, the present work shows significant differences between the material produced with L-DED-P and L-DED-W, and demonstrates a strong influence of process-induced defects on the fatigue behavior of additively manufactured materials.
机译：由于激光直接能量沉积的巨大潜力（L-DED）关于具有复杂几何形状的组件的生产和维护，这种添加剂制造工艺具有巨大的工业和科学兴趣。作为L-DED的两个原则，即常用的基于线（L-DED-W）和粉末（L-DED-P）工艺，是必不可少的，彻底分析原材料的影响以及所得材料特性的工艺条件。因此，在本作品中，由AISI 316L制成并通过L-DED-P和L-DED-W制备。为了表征产生的材料体积的循环性质，进行仪表循环压痕试验（Cits）以及单轴疲劳试验。在疲劳试验中获得的循环变形行为表示L-DED-W材料的显着提高疲劳强度，与较高的8-铁素体级分和较小的晶粒尺寸相关。这是由不同的工艺条件引起的，由此L-DED-W的S-铁素体分数增加是由化学成分的差异产生的。然而，S-N_F曲线对于L-DED-P的2×10〜6循环显示出较高的疲劳极限，这是由L-DED-W样本中观察到的显着更大的工艺诱导的非金属夹杂物引起的。总之，目前的作品显示了用L-DED-P和L-DED-W产生的材料之间的显着差异，并表明了过程诱导的缺陷对橡皮花的疲劳行为对橡皮花行为的强烈影响。

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  • 来源
    《Materials Science and Engineering》 |2021年第22期|141383.1-141383.10|共10页
  • 作者

    B.Blinn; P.Lion; O.Jordan; S. Meiniger; S. Mischliwski; C.Tepper; C.Glaeβner; J.C. Aurich; M. Weigold; T. Beck;

  • 作者单位

    Institute of Materials Science and Engineering TU Kaiserslautern Gottlieb-Daimler Str. 44 67663 Kaiserslautern Germany;

    Institute of Materials Science and Engineering TU Kaiserslautern Gottlieb-Daimler Str. 44 67663 Kaiserslautern Germany;

    Institute of Materials Science and Engineering TU Kaiserslautern Gottlieb-Daimler Str. 44 67663 Kaiserslautern Germany;

    Institute of Production Management Technology and Machine Tools (PTW) Technical University of Darmstadt Otto-Berndt-Str. 2 64287 Darmstadt Germany;

    Institute of Production Management Technology and Machine Tools (PTW) Technical University of Darmstadt Otto-Berndt-Str. 2 64287 Darmstadt Germany;

    Institute of Production Management Technology and Machine Tools (PTW) Technical University of Darmstadt Otto-Berndt-Str. 2 64287 Darmstadt Germany;

    Institute for Manufacturing Technology and Production Systems TU Kaiserslautern Gottlieb-Daimler Str. 42 67663 Kaiserslautern Germany;

    Institute for Manufacturing Technology and Production Systems TU Kaiserslautern Gottlieb-Daimler Str. 42 67663 Kaiserslautern Germany;

    Institute of Production Management Technology and Machine Tools (PTW) Technical University of Darmstadt Otto-Berndt-Str. 2 64287 Darmstadt Germany;

    Institute of Materials Science and Engineering TU Kaiserslautern Gottlieb-Daimler Str. 44 67663 Kaiserslautern Germany;

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  • 正文语种 eng
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  • 关键词

    Laser direct energy deposition; Fatigue; Nonmetallic inclusions; Cyclic deformation behavior; Cyclic indentation tests; Additive manufacturing;

    机译：激光直接能量沉积;疲劳;非金属夹杂物;循环变形行为;循环压痕试验;添加剂制造;

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