Dongsheng Zhang¹, Wei Liu², Yuxiao Li³, Darui Sun⁴, Yu Wu², Shengnian Luo³, Sen Chen⁵, Ye Tao⁴, Bingbing Zhang^4*

1 Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing, China

2 3D Printing Research and Engineering Technology Center, Beijing Institute of Aeronautical Materials, Beijing, China

3 The Peac Institute of Multiscale Sciences, Chengdu, Sichuan, China

4 Institute of High Energy Physics, Chinese Academy of Sciences, 19B Yuquan Road, Beijing, China

5 Institute of Fluid Physics, China Academy of Engineering Physics, Mianyang, Sichuan 621900, China

* Corresponding authors emails: zhangbb@ihep.ac.cn

DOI10.24435/materialscloud:86-cq [version v1]

Publication date: Mar 02, 2023

How to cite this record

Dongsheng Zhang, Wei Liu, Yuxiao Li, Darui Sun, Yu Wu, Shengnian Luo, Sen Chen, Ye Tao, Bingbing Zhang, Dynamic crystal rocking of nickel-based single crystal superalloy during the epitaxial growth of the additive manufacturing process, Materials Cloud Archive 2023.32 (2023), https://doi.org/10.24435/materialscloud:86-cq

Description

The understanding of dynamic process of epitaxial microstructure forming in laser additive manufacturing is of vital importance for achieving products with single crystalline texture. Here, we perform in-situ, real-time synchrotron Laue diffraction experiments to capture the microstructural evolution of nickel-based single-crystal superalloys during rapid laser remelting process. In-situ synchrotron radiation Laue diffraction characterizes the crystal rotation behavior and stray grains formation process. With complementary thermo-mechanical coupled finite element simulation and molecular dynamics simulation, we identify that the crystal rotation is governed by the localized heating/cooling heterogeneity induced deformation gradient, and that the subgrains rotation caused by rapid dislocation movement and complex stress field could be the major mechanism in the generation of granular stray grains at the bottom of the melt pool.

Materials Cloud sections using this data

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source data.rar MD5md5:432730d9aadacfb83381a998f8d0b1b5	13.7 MiB	The experimental and simulation data, as well as the simulation specifications generated in the above preprint

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Keywords

in-situ Laue diffraction microstructural evolution nickel-based superalloy laser remelting