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Microstructure and mechanical properties of 304 stainless steel produced by interpass milling hybrid direct energy deposition-arc

Microstructure and mechanical properties of 304 stainless steel produced by interpass milling hybrid direct energy deposition-arc

Authors :
Xiaohui Zhao
Ziwei Li
Bin Yang
Xiaoyu Sun
Guorui Sun
Shupeng Wang
Chao Chen
Source :
Journal of Materials Research and Technology, Vol 27, Iss , Pp 3744-3756 (2023)
Publication Year :
2023
Publisher :
Elsevier, 2023.

Abstract

Good surface forming accuracy is an important indicator for evaluating the quality of the additive components, especially for complex components that require high surface forming accuracy, and the regulation of microstructure and properties has a very important impact on metal processing and manufacturing. In this study, an experimental device for interpass milling hybrid direct energy deposition-arc was developed. Combined with the simulation method, the effect of interpass milling on the forming accuracy was deeply studied from the liquid metal's force and flow behavior. The changes in microstructure and properties were also studied in depth from the evolution mechanism of residual stress and the solidification of liquid metal, thereby enhancing the controllability of the forming and properties of stainless steel additive components. The results showed that the addition of interpass milling refined the grains, weakened the orientation texture of the crystal plane, and significantly improved the uniformity of the microstructure. Finally, the additive component with the best mechanical properties was obtained at a milling depth of 200 μm, with a 31.8 % increase in microhardness, 14.9 %, and 59.2 % increase in tensile strength and elongation, respectively. The anisotropy to isotropy of the deposited sample was transformed.

Details

Language :
English
ISSN :
22387854
Volume :
27
Issue :
3744-3756
Database :
Directory of Open Access Journals
Journal :
Journal of Materials Research and Technology
Publication Type :
Academic Journal
Accession number :
edsdoj.bc829c08bc7447a5824ec11c9eb68c79
Document Type :
article
Full Text :
https://doi.org/10.1016/j.jmrt.2023.10.137