Determination of crystallographic young’s modulus for sheet metals by in situ neutron diffraction
Determination of crystallographic young’s modulus for sheet metals by in situ neutron diffraction
复制标题
原位中子衍射测定金属板材的晶体杨氏模量
DOI：
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发表时间：
2017
期刊：
影响因子：
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通讯作者：
W. Volk
中科院分区：
文献类型：
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作者：
S. Vitzthum;C. Hartmann;H. A. Weiss;G. Baumgartner;M. Hofmann;W. Volk
Elastic recovery is an important issue in sheet metal forming, especially in the context of the upcoming use of high strength steels due to shifted relations between Young’s modulus and strength. One important factor when it comes to elastic recovery prediction is a deep understanding for the elasto-plastic characteristics of the material. Today in general simple elastic behavior with constant Young’s modulus and Poisson’s ratio is assumed. Macroscopic analysis in standard tests shows that these assumptions are insufficient for an appropriate prediction of elastic recovery in sheet metal forming, which is why different phenomenological correlation models are derived. An experimental setup and microscopic investigation to further prove these models and to verify the approaches on another scale for sheet metals is presented within this paper. In the study microscopic deformation behavior of loading and unloading of a HC260LA sheet metal is analysed using in-situ neutron diffraction. Based on the lattice plane strains an orientation specific crystallographic Young’s modulus for different rolling directions is determined.
