Modeling of thermal behavior and mass transport in multi-layer laser additive manufacturing of Ni-based alloy on cast iron | |
Gan ZT(甘正涛); Liu H(刘昊); Li SX(李少霞); He XL(何秀丽); Yu G(虞钢); He, XL; Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China. | |
发表期刊 | INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER |
2017-08-01 | |
卷号 | 111页码:709-722 |
ISSN | 0017-9310 |
摘要 | During multi-layer additive manufacturing, multiple thermal cycles and addition of dissimilar-metal powder, even functionally graded materials (FGMs), lead to complicated transport phenomena and solidification behavior in the molten pool, which significantly impact the microstructure evolution and mechanical properties of deposited part. In this study, a predictive three-dimensional numerical model is developed to understand the multi-physical processes such as thermal behavior, Marangoni effect, composition transport, solidification behavior, and dendrite growth in multi-layer additive manufacturing of Ni-based alloy on cast iron. Dimensional analysis is performed to simplify the force balance equation on the liquid-gas interface, which determines the dynamic profile of molten pool. The conservation equations of mass, momentum, enthalpy and concentration are solved in parallel. Transient temperature distribution and thermal cycles at different locations are obtained. The solidification parameters at the liquid-solid interface are evaluated to interpret the solidification microstructure. The distribution of alloy elements and composition profile (Ni and Cr) are also present and compared with the relevant experimental results. The results show that the cooling rate declines progressively as the subsequent layers deposit, which results in the coarser solidified grains in the upper of part. Even though the powder and substrate can be efficiently mixed to be a homogeneous molten pool, a non-uniform concentration distribution is observed at the bottom of the deposited part, which agrees well with the experimental composition profile using Energy Dispersive Spectrometer (EDS). (C) 2017 Elsevier Ltd. All rights reserved. |
关键词 | Additive Manufacturing Thermal Behavior Mass Transfer Liquid-gas Interface Solidification Functionally Graded Materials |
DOI | 10.1016/j.ijheatmasstransfer.2017.04.055 |
收录类别 | SCI ; EI |
语种 | 英语 |
WOS记录号 | WOS:000404092900066 |
关键词[WOS] | Numerical-simulation ; Steel ; Solidification ; Deposition ; Evolution ; Profile ; Field ; Heat |
WOS研究方向 | Thermodynamics ; Engineering ; Mechanics |
WOS类目 | Thermodynamics ; Engineering, Mechanical ; Mechanics |
项目资助者 | National Natural Science Foundation of China(11272316||Natural Science Foundation of Jiangsu Province(BK20160258)||11272317||11502269) |
课题组名称 | MAM激光智能制造工艺力学 |
论文分区 | 一类 |
力学所作者排名 | 1 |
引用统计 | |
文献类型 | 期刊论文 |
条目标识符 | http://dspace.imech.ac.cn/handle/311007/60629 |
专题 | 先进制造工艺力学实验室 |
通讯作者 | He, XL; Yu, G (reprint author), Chinese Acad Sci, Inst Mech, Key Lab Mech Adv Mfg, Beijing 100190, Peoples R China. |
推荐引用方式 GB/T 7714 | Gan ZT,Liu H,Li SX,et al. Modeling of thermal behavior and mass transport in multi-layer laser additive manufacturing of Ni-based alloy on cast iron[J]. INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,2017,111:709-722. |
APA | Gan ZT.,Liu H.,Li SX.,He XL.,Yu G.,...&Yu, G .(2017).Modeling of thermal behavior and mass transport in multi-layer laser additive manufacturing of Ni-based alloy on cast iron.INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER,111,709-722. |
MLA | Gan ZT,et al."Modeling of thermal behavior and mass transport in multi-layer laser additive manufacturing of Ni-based alloy on cast iron".INTERNATIONAL JOURNAL OF HEAT AND MASS TRANSFER 111(2017):709-722. |
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