2D transient model for rapid laser remelt

Zhu Daqing; Zuo Duluo; Li Shimin

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Volume 27 Issue 2

Sep. 2013

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Article Navigation > LASER TECHNOLOGY > 2003 > 27(2): 90-93

Citation:

2D transient model for rapid laser remelt

1.
National Laboratory of Laser Technology, HUST, Wuhan, 430074

Received Date: 2002-03-26
Accepted Date: 2002-08-20

Abstract

A two-dimensional transient model for high speed laser remelt was presented by solving the heat conduction and convection equations through finite element method and multigrid method.The time dependent physical process of laser remelt under CW laser and pulse laser with high scanning speed (HSP)(2m/s) and lowscanning speed (LSP)(0.2m/s)were simulated.The result shows that the scanning speed has big impact on the streamline and the distribution of the composition.It also shows that the same area on surface may be heated by multi-pulses of laser under LSP while it only be heated by one pulse under HSP.The result indicates that during laser remelt,the surface of the melt pool changes,the middle hollows and the edge reises.In addition,the shape,the size,the average cooling rate of the pool and the cooling rate at the edge of the pool can be obtained through the results.These cooling rates are useful to analyze the microstructure.
- laser remelt,
- transient model,
- convection,
- Marangoni flow

References

[1]	徐恒钧.北京工业大学学报,1998,24(3):130～136.
[2]	Cline H E,Anthony T R.J A P,1977,48(9):3895～3900.
[3]	Kou S,Hsu S C,Mehrebian R.Metall Trans B,1981,B12(3):33～45.
[4]	Chan C,Mazumder J,Chen M M.Metall Trans A,1984,A15(2):2175～2184.
[5]	Chande T,Mazumder J.J A P,1985,57(6):2226～2232.
[6]	Kou S,Wang Y H.Metall Trans A,1986,A17(12):2265～2270.
[7]	Chan C,Mazumder J,Chen M M.Mater Sci Technol,1987,3(4):306～311.
[8]	Chan C,Mazumder J,Chen M M.J A P,1988,64(11):6166～6174.
[9]	Hoadley A,Rappaz M.Metall Trans B,1991,B22(2):101～109.
[10]	Mazumder J.Opt Engng,1991,30(8):1208～1219.
[11]	Picasso M,Hoadley A F A.Int J Num Meth Heat Fluid Flow,1994,4:61～83.
[12]	Ravindran K,Srinivasan J,Marathe A G.Mech Res Commun,1995,22(3):291～304.
[13]	Yilbas B S.Int J Heat Mass Transfer,1997,40(5):1131～1143.
[14]	Tuerk S.Int J Num Meth in Fluids,1994,18:71～105.
[15]	Zhu D Q,Zuo D L,Li Sh M.Laser Tech,2000,24(1):24～26.

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通讯作者: 陈斌, bchen63@163.com

1.
沈阳化工大学材料科学与工程学院沈阳 110142

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2D transient model for rapid laser remelt

1. National Laboratory of Laser Technology, HUST, Wuhan, 430074

Received Date: 2002-03-26
Accepted Date: 2002-08-20
Available Online: 2003-03-25

Abstract: A two-dimensional transient model for high speed laser remelt was presented by solving the heat conduction and convection equations through finite element method and multigrid method.The time dependent physical process of laser remelt under CW laser and pulse laser with high scanning speed (HSP)(2m/s) and lowscanning speed (LSP)(0.2m/s)were simulated.The result shows that the scanning speed has big impact on the streamline and the distribution of the composition.It also shows that the same area on surface may be heated by multi-pulses of laser under LSP while it only be heated by one pulse under HSP.The result indicates that during laser remelt,the surface of the melt pool changes,the middle hollows and the edge reises.In addition,the shape,the size,the average cooling rate of the pool and the cooling rate at the edge of the pool can be obtained through the results.These cooling rates are useful to analyze the microstructure.

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Reference (15)

[1]	徐恒钧.北京工业大学学报,1998,24(3):130～136.
[2]	Cline H E,Anthony T R.J A P,1977,48(9):3895～3900.
[3]	Kou S,Hsu S C,Mehrebian R.Metall Trans B,1981,B12(3):33～45.
[4]	Chan C,Mazumder J,Chen M M.Metall Trans A,1984,A15(2):2175～2184.
[5]	Chande T,Mazumder J.J A P,1985,57(6):2226～2232.
[6]	Kou S,Wang Y H.Metall Trans A,1986,A17(12):2265～2270.
[7]	Chan C,Mazumder J,Chen M M.Mater Sci Technol,1987,3(4):306～311.
[8]	Chan C,Mazumder J,Chen M M.J A P,1988,64(11):6166～6174.
[9]	Hoadley A,Rappaz M.Metall Trans B,1991,B22(2):101～109.
[10]	Mazumder J.Opt Engng,1991,30(8):1208～1219.
[11]	Picasso M,Hoadley A F A.Int J Num Meth Heat Fluid Flow,1994,4:61～83.
[12]	Ravindran K,Srinivasan J,Marathe A G.Mech Res Commun,1995,22(3):291～304.
[13]	Yilbas B S.Int J Heat Mass Transfer,1997,40(5):1131～1143.
[14]	Tuerk S.Int J Num Meth in Fluids,1994,18:71～105.
[15]	Zhu D Q,Zuo D L,Li Sh M.Laser Tech,2000,24(1):24～26.

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2D transient model for rapid laser remelt

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通讯作者: 陈斌, bchen63@163.com

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2D transient model for rapid laser remelt

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