Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling

Micromechanical behaviour of Ni-based superalloys close to the yield point: a comparative study between neutron diffraction on different polycrystalline microstructures and crystal plasticity finite element modelling
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镍基高温合金接近屈服点的微观力学行为:不同多晶微观结构的中子衍射与晶体塑性有限元建模的比较研究

DOI:
10.1007/s00161-018-0720-0
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发表时间:
--
影响因子:
2.6
通讯作者:
Werner
Werner
中科院分区:
工程技术3区
文献类型:
--
作者:
Kobylinski;Lawitzki;R. Hofmann;Krempaszky;Werner

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为了研究多晶镍基高温合金(Haynes 282和Inconel 718)在弹塑性区变形时的微观结构依赖关系,通过原位中子衍射监测单轴拉伸加载过程中晶格应变沿沿着不同宏观方向和沿着不同晶向的演化。此外,基于晶体塑性的有限元模型被建立来描述单轴加载的多晶集合体中的单胞的微观力学行为。适当的(微机械)场量的后处理允许模拟衍射实验,从而直接比较和讨论实验和建模结果。
To investigate the microstructure-dependent relationships in polycrystalline Ni-based superalloys (Haynes 282 and Inconel 718) deformed in the elastoplastic regime, the lattice strain evolution along various macroscopic directions and along various crystallographic directions is monitored via in situ neutron diffraction during uniaxial tensile loading. In addition, a crystal plasticity-based finite element model is set up to describe the micromechanical behaviour of a unit cell within a uniaxially loaded polycrystalline aggregate. Appropriate postprocessing of the (micromechanical) field quantities allows to simulate the diffraction experiment and thus to directly compare and to discuss experimental and modelling results.
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