Multi-scale modelling of solidification and microstructure evolution in laser-deposition of T15 high speed steel

Jammal, Ali1,2; Wang, Gang1; JiaXin, Zhao1; Yang, Hanbo1; Yang, Songge3; Zhong, Yu3; Rong, Yiming2

2020

10.1016/j.jmapro.2019.12.024

Journal of Manufacturing Processes   影响因子和分区

1526-6125

2212-4616

Laser powder deposition (LPD) process is used in additive manufacturing for powder deposition of metal alloys, it involves parts building and re-manufacturing. However, this process is subjected to high cooling rates and rapid solidification hence the prediction of solidifying microstructure becomes challenging. In order to model the solidification process of the LPD of single track T15 steel, a phase field model (PFM) was proposed coupled with a nucleation, phase transition and heat transfer models. This model was employed to simulate the different microstructure phases and solute distribution. Further, a level set volume of fluid (LS-VOF) model was used to calculate the cooling rate and thermal gradient of the melt pool where these variables are subsequently used as a comparison with the PFM. PF results showed two main phases of microstructure identified as cellular and equiaxed which evolved as solidification took place. The results were compared to thermal analysis and experimental results. Experimental analysis showed cellular microstructure dominated at the substrate-track interface and equiaxed microstructure in the remainder of the track. The grains size distribution obtained from PFM at different location in the track was compared to Scanning electron microscopy (SEM) imaging. The paper showed that the proposed PFM is a promising tool for microstructure prediction in LPD process.
© 2019 The Society of Manufacturing Engineers

Laser powder deposition T15 steel Rapid solidification Phase field Nucleation Level set-volume of fluid model

SCI ; EI

英语

其他

National Basic Research Program of China (973 Program)[61328302]

Engineering

Engineering, Manufacturing

WOS:000513922000003

Elsevier Ltd

20195207924960

Cooling ; Deposition ; High speed steel ; Nucleation ; Powder metals ; Scanning electron microscopy ; Textures ; Thermoanalysis

Heat Transfer:641.2 ; Chemistry:801 ; Chemical Operations:802.3 ; Crystal Growth:933.1.2

Web of Science

1.State Key Laboratory of Tribology & Institute of Manufacturing Engineering, Department of Mechanical Engineering, Tsinghua University, Beijing; 100084, China
2.Department of Mechanical and Energy Engineering, Southern University of Science and Technology, Shenzhen; 518055, China
3.Department of Mechanical Engineering, Worcester Polytechnic Institute, Worcester; MA; 01609, United States

Jammal, Ali,Wang, Gang,JiaXin, Zhao,et al. Multi-scale modelling of solidification and microstructure evolution in laser-deposition of T15 high speed steel[J]. Journal of Manufacturing Processes,2020,50:24-33.

Jammal, Ali.,Wang, Gang.,JiaXin, Zhao.,Yang, Hanbo.,Yang, Songge.,...&Rong, Yiming.(2020).Multi-scale modelling of solidification and microstructure evolution in laser-deposition of T15 high speed steel.Journal of Manufacturing Processes,50,24-33.

Jammal, Ali,et al."Multi-scale modelling of solidification and microstructure evolution in laser-deposition of T15 high speed steel".Journal of Manufacturing Processes 50(2020):24-33.