Temperature field and morphology simulation of laser melting deposited Inconel718 alloy

被引：0

作者：

Tan S.-J. ^{[1
]}

Li D.-S. ^{[1
]}

Ye Y. ^{[1
]}

Qin Q.-H. ^{[2
]}

He J.-J. ^{[1
]}

Zou W. ^{[1
]}

机构：

[1] School of Materials Science and Engineering, Nanchang Hangkong University, Nanchang

[2] College of Engineering and Computer Science, Australian National University, Canberra

来源：

Li, Duo-Sheng (duosheng.li@nchu.edu.cn) | 2018年 / Central South University of Technology卷 / 28期

基金：

中国国家自然科学基金;

关键词：

Inconel718; Laser melting deposition; Numerical simulation; Temperature field;

D O I：

10.19476/j.ysxb.1004.0609.2018.11.16

中图分类号：

学科分类号：

摘要：

Laser melting deposited technology was applied using an internal laser coaxial-powder feeding way, and the heat source model of among light-powder-substrate interaction was built, which was used to simulate the single channel of laser melting deposited Inconel718 alloy under different process parameters. The simulation was used by dead-live unit method, via changing the unit material properties and restarting solver to finish the change of metal powder to solid. The results show that when the scanning speed is constant, with increasing laser power from 500 W to 1000 W, the molten pool increases gradually, the highest temperature of molten pool also increases from 2494 K to 3456 K, and the width and height of deposited single channel increase. When the laser power is constant, with increasing scanning speed from 5 mm/s to 15 mm/s, the highest temperature of molten pool decreases from 2494 K to 2047 K, meantime, the width and height of deposition single channel decrease. The simulation results are almost consistent with the experimental results, thus, the model has good reliability and important application value. © 2018, Science Press. All right reserved.

引用

页码：2296 / 2304

页数：8

共 22 条

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[22] Samuel S., Joel B., The prediction of the emissivity and thermal conductivity of powder beds, Particulate Science and Technology, 22, 4, pp. 427-440, (2004)

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