Evolution of strain field in laser-repaired stainless steel/nickel-based heterogeneous alloy

In this study, the strain field evolution mechanism of laser-repaired 304 stainless steel /In718 heterogeneous structure was studied using EBSD technique. The results show that the strain concentration in the repaired zone is much smaller than that in the substrate zone. As the laser power increases...

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Bibliographic Details
Published in:Applied physics. A, Materials science & processing Materials science & processing, 2024-10, Vol.130 (10), Article 768
Main Authors: Liu, Fei, Geng, Chuanqing, Hou, Xiaohu, Xie, Huimin
Format: Article
Language:English
Subjects:
Characterization and Evaluation of Materials
Concentration gradient
Condensed Matter Physics
Dislocation density
Grain orientation
Heterogeneous structure
Lasers
Machines
Manufacturing
Nanotechnology
Nickel base alloys
Optical and Electronic Materials
Physics
Physics and Astronomy
Processes
Rapid Communications
Stainless steels
Strain concentration
Substrates
Surfaces and Interfaces
Thin Films
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Summary:In this study, the strain field evolution mechanism of laser-repaired 304 stainless steel /In718 heterogeneous structure was studied using EBSD technique. The results show that the strain concentration in the repaired zone is much smaller than that in the substrate zone. As the laser power increases from 900 W to 1100 W, the strain concentration in the repaired zone and the substrate zone increases significantly. The different strain concentration in the repaired region and the substrate region is mainly related to the increase of lattice distortion, dislocation density and temperature gradient. In addition, because the grains with different orientations have different Taylor factor, and therefore, grain orientation is also key factor affecting the strain concentration.
ISSN:0947-8396
1432-0630
DOI:10.1007/s00339-024-07935-4